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<!DOCTYPE html>
<html lang="en">
  <head>
    <title>MGLHeatmapStyleLayer Class Reference</title>
    <link rel="stylesheet" type="text/css" href="../css/jazzy.css" />
    <link rel="stylesheet" type="text/css" href="../css/highlight.css" />
    <meta charset="utf-8">
    <script src="../js/jquery.min.js" defer></script>
    <script src="../js/jazzy.js" defer></script>
    <link rel='shortcut icon' href='https://www.mapbox.com/img/favicon.ico' type='image/x-icon' />

    <style type="text/css">
      .nav-group-name[data-name="MGLHeatmapStyleLayer"] > .small-heading,
      .nav-group-task[data-name="MGLHeatmapStyleLayer"] {
        background-color: #f5f8fc;
        font-family: "Open Sans Bold";
        border-left: 3px solid #3a68d8;
        padding-left: 5px
      }
    </style>
  </head>
  <body>

    <a name="//apple_ref/objc/Class/MGLHeatmapStyleLayer" class="dashAnchor"></a>

    <a title="MGLHeatmapStyleLayer Class Reference"></a>

    <header class="header-container">
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            <span class='header-tag'>Maps SDK for macOS  Reference</span>
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      		      <path stroke="none" stroke-width="1" fill="white" fill-rule="evenodd" d="M16.6,0.4 C7.6,0.4 0.3,7.7 0.3,16.7 C0.3,23.9 5,30 11.4,32.2 C12.2,32.3 12.5,31.8 12.5,31.4 L12.5,28.6 C8,29.6 7,26.4 7,26.4 C6.3,24.5 5.2,24 5.2,24 C3.7,23 5.3,23 5.3,23 C6.9,23.1 7.8,24.7 7.8,24.7 C9.3,27.2 11.6,26.5 12.5,26.1 C12.6,25 13.1,24.3 13.5,23.9 C9.9,23.5 6.1,22.1 6.1,15.8 C6.1,14 6.7,12.6 7.8,11.4 C7.6,11 7.1,9.3 8,7.1 C8,7.1 9.4,6.7 12.5,8.8 C13.8,8.4 15.2,8.3 16.6,8.3 C18,8.3 19.4,8.5 20.7,8.8 C23.8,6.7 25.2,7.1 25.2,7.1 C26.1,9.3 25.5,11 25.4,11.4 C26.4,12.5 27.1,14 27.1,15.8 C27.1,22.1 23.3,23.4 19.7,23.8 C20.3,24.3 20.8,25.3 20.8,26.8 L20.8,31.3 C20.8,31.7 21.1,32.2 21.9,32.1 C28.4,29.9 33,23.8 33,16.6 C32.9,7.7 25.6,0.4 16.6,0.4 L16.6,0.4 Z"></path>
              </svg>
              View on GitHub
            </a>
          </p>
    
          <p class="header-col header-col--secondary">
            <a class="header-link bold" href="dash-feed://https%3A%2F%2Fmapbox%2Egithub%2Eio%2Fmapbox%2Dgl%2Dnative%2Fmacos%2Fdocsets%2FMapbox%2Exml">
              <img style="margin-bottom: 1px;" class="header-icon" src="../img/dash.png"/>
              Install in Dash
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        <a class="breadcrumb" href="../index.html">Mapbox Maps SDK for macOS Reference</a>
        <img class="carat" src="../img/carat.png" />
        MGLHeatmapStyleLayer Class Reference
      </div>
    </div>

    <div class="content-wrapper limiter">
      <nav class="navigation">
        <ul class="nav-groups">
          <li class="nav-group-name" data-name="Guides">
            <a class="small-heading" href="../Guides.html">Guides<span class="anchor-icon" /></a>
            <ul class="nav-group-tasks">
              <li class="nav-group-task" data-name="Working with GeoJSON Data" data-url="working-with-geojson-data.html">
                <a title="Working with GeoJSON Data" class="nav-group-task-link" href="../working-with-geojson-data.html">Working with GeoJSON Data</a>
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                <a title="Predicates and Expressions" class="nav-group-task-link" href="../predicates-and-expressions.html">Predicates and Expressions</a>
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                <a title="For Style Authors" class="nav-group-task-link" href="../for-style-authors.html">For Style Authors</a>
              </li>
              <li class="nav-group-task" data-name="Migrating to Expressions" data-url="migrating-to-expressions.html">
                <a title="Migrating to Expressions" class="nav-group-task-link" href="../migrating-to-expressions.html">Migrating to Expressions</a>
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            <a class="small-heading" href="../Maps.html">Maps<span class="anchor-icon" /></a>
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                <a title="MGLAccountManager" class="nav-group-task-link" href="../Classes/MGLAccountManager.html">MGLAccountManager</a>
              </li>
              <li class="nav-group-task" data-name="MGLMapCamera" data-url="Classes/MGLMapCamera.html">
                <a title="MGLMapCamera" class="nav-group-task-link" href="../Classes/MGLMapCamera.html">MGLMapCamera</a>
              </li>
              <li class="nav-group-task" data-name="MGLMapView" data-url="Classes/MGLMapView.html">
                <a title="MGLMapView" class="nav-group-task-link" href="../Classes/MGLMapView.html">MGLMapView</a>
              </li>
              <li class="nav-group-task" data-name="MGLMapViewDelegate" data-url="Protocols/MGLMapViewDelegate.html">
                <a title="MGLMapViewDelegate" class="nav-group-task-link" href="../Protocols/MGLMapViewDelegate.html">MGLMapViewDelegate</a>
              </li>
              <li class="nav-group-task" data-name="MGLMapSnapshot" data-url="Classes/MGLMapSnapshot.html">
                <a title="MGLMapSnapshot" class="nav-group-task-link" href="../Classes/MGLMapSnapshot.html">MGLMapSnapshot</a>
              </li>
              <li class="nav-group-task" data-name="MGLMapSnapshotOptions" data-url="Classes/MGLMapSnapshotOptions.html">
                <a title="MGLMapSnapshotOptions" class="nav-group-task-link" href="../Classes/MGLMapSnapshotOptions.html">MGLMapSnapshotOptions</a>
              </li>
              <li class="nav-group-task" data-name="MGLMapSnapshotter" data-url="Classes/MGLMapSnapshotter.html">
                <a title="MGLMapSnapshotter" class="nav-group-task-link" href="../Classes/MGLMapSnapshotter.html">MGLMapSnapshotter</a>
              </li>
            </ul>
          </li>
          <li class="nav-group-name" data-name="Shapes and Annotations">
            <a class="small-heading" href="../Shapes and Annotations.html">Shapes and Annotations<span class="anchor-icon" /></a>
            <ul class="nav-group-tasks">
              <li class="nav-group-task" data-name="MGLAnnotation" data-url="Protocols/MGLAnnotation.html">
                <a title="MGLAnnotation" class="nav-group-task-link" href="../Protocols/MGLAnnotation.html">MGLAnnotation</a>
              </li>
              <li class="nav-group-task" data-name="MGLAnnotationImage" data-url="Classes/MGLAnnotationImage.html">
                <a title="MGLAnnotationImage" class="nav-group-task-link" href="../Classes/MGLAnnotationImage.html">MGLAnnotationImage</a>
              </li>
              <li class="nav-group-task" data-name="MGLOverlay" data-url="Protocols/MGLOverlay.html">
                <a title="MGLOverlay" class="nav-group-task-link" href="../Protocols/MGLOverlay.html">MGLOverlay</a>
              </li>
              <li class="nav-group-task" data-name="MGLShape" data-url="Classes/MGLShape.html">
                <a title="MGLShape" class="nav-group-task-link" href="../Classes/MGLShape.html">MGLShape</a>
              </li>
              <li class="nav-group-task" data-name="MGLMultiPoint" data-url="Classes/MGLMultiPoint.html">
                <a title="MGLMultiPoint" class="nav-group-task-link" href="../Classes/MGLMultiPoint.html">MGLMultiPoint</a>
              </li>
              <li class="nav-group-task" data-name="MGLPointAnnotation" data-url="Classes/MGLPointAnnotation.html">
                <a title="MGLPointAnnotation" class="nav-group-task-link" href="../Classes/MGLPointAnnotation.html">MGLPointAnnotation</a>
              </li>
              <li class="nav-group-task" data-name="MGLPointCollection" data-url="Classes/MGLPointCollection.html">
                <a title="MGLPointCollection" class="nav-group-task-link" href="../Classes/MGLPointCollection.html">MGLPointCollection</a>
              </li>
              <li class="nav-group-task" data-name="MGLPolygon" data-url="Classes/MGLPolygon.html">
                <a title="MGLPolygon" class="nav-group-task-link" href="../Classes/MGLPolygon.html">MGLPolygon</a>
              </li>
              <li class="nav-group-task" data-name="MGLPolyline" data-url="Classes/MGLPolyline.html">
                <a title="MGLPolyline" class="nav-group-task-link" href="../Classes/MGLPolyline.html">MGLPolyline</a>
              </li>
              <li class="nav-group-task" data-name="MGLMultiPolygon" data-url="Classes/MGLMultiPolygon.html">
                <a title="MGLMultiPolygon" class="nav-group-task-link" href="../Classes/MGLMultiPolygon.html">MGLMultiPolygon</a>
              </li>
              <li class="nav-group-task" data-name="MGLMultiPolyline" data-url="Classes/MGLMultiPolyline.html">
                <a title="MGLMultiPolyline" class="nav-group-task-link" href="../Classes/MGLMultiPolyline.html">MGLMultiPolyline</a>
              </li>
              <li class="nav-group-task" data-name="MGLShapeCollection" data-url="Classes/MGLShapeCollection.html">
                <a title="MGLShapeCollection" class="nav-group-task-link" href="../Classes/MGLShapeCollection.html">MGLShapeCollection</a>
              </li>
            </ul>
          </li>
          <li class="nav-group-name" data-name="Styling the Map">
            <a class="small-heading" href="../Styling the Map.html">Styling the Map<span class="anchor-icon" /></a>
            <ul class="nav-group-tasks">
              <li class="nav-group-task" data-name="MGLStyle" data-url="Classes/MGLStyle.html">
                <a title="MGLStyle" class="nav-group-task-link" href="../Classes/MGLStyle.html">MGLStyle</a>
              </li>
              <li class="nav-group-task" data-name="MGLLight" data-url="Classes/MGLLight.html">
                <a title="MGLLight" class="nav-group-task-link" href="../Classes/MGLLight.html">MGLLight</a>
              </li>
            </ul>
          </li>
          <li class="nav-group-name" data-name="Content Primitives">
            <a class="small-heading" href="../Content Primitives.html">Content Primitives<span class="anchor-icon" /></a>
            <ul class="nav-group-tasks">
              <li class="nav-group-task" data-name="MGLFeature" data-url="Protocols/MGLFeature.html">
                <a title="MGLFeature" class="nav-group-task-link" href="../Protocols/MGLFeature.html">MGLFeature</a>
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              <li class="nav-group-task" data-name="MGLLineJoin" data-url="Enums/MGLLineJoin.html">
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                <a title="MGLTileCoordinateSystem" class="nav-group-task-link" href="../Enums/MGLTileCoordinateSystem.html">MGLTileCoordinateSystem</a>
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      <article class="main-content">

        <section class="section">
          <div class="section-content">
            <a href="#/MGLHeatmapStyleLayer"><h1 id="MGLHeatmapStyleLayer">MGLHeatmapStyleLayer<span class="anchor-icon" /></h1></a>
              <div class="declaration">
                <div class="language">
                  <pre class="highlight objective_c"><code>
<span class="k">@interface</span> <span class="nc">MGLHeatmapStyleLayer</span> <span class="p">:</span> <span class="nc"><a href="../Classes/MGLVectorStyleLayer.html">MGLVectorStyleLayer</a></span></code></pre>

                </div>
              </div>
            <p>An <code>MGLHeatmapStyleLayer</code> is a style layer that renders a <a
href="https://en.wikipedia.org/wiki/Heat_map">heatmap</a>.</p>

<p>A heatmap visualizes the spatial distribution of a large, dense set of point
data, using color to avoid cluttering the map with individual points at low
zoom levels. The points are weighted by an attribute you specify. Use a heatmap
style layer in conjunction with point or point collection features. These
features can come from vector tiles loaded by an <code><a href="../Classes/MGLVectorTileSource.html">MGLVectorTileSource</a></code> object,
or they can be <code><a href="../Classes/MGLPointAnnotation.html">MGLPointAnnotation</a></code>, <code><a href="../Content Primitives.html#/c:objc(cs)MGLPointFeature">MGLPointFeature</a></code>, <code><a href="../Classes/MGLPointCollection.html">MGLPointCollection</a></code>,
or <code><a href="../Content Primitives.html#/c:objc(cs)MGLPointCollectionFeature">MGLPointCollectionFeature</a></code> instances in an <code><a href="../Classes/MGLShapeSource.html">MGLShapeSource</a></code> or
<code><a href="../Classes/MGLComputedShapeSource.html">MGLComputedShapeSource</a></code> object.</p>

<p>Consider accompanying a heatmap style layer with an <code><a href="../Classes/MGLCircleStyleLayer.html">MGLCircleStyleLayer</a></code> or
<code><a href="../Classes/MGLSymbolStyleLayer.html">MGLSymbolStyleLayer</a></code> at high zoom levels. If you are unsure whether the point
data in an <code><a href="../Classes/MGLShapeSource.html">MGLShapeSource</a></code> is dense enough to warrant a heatmap, you can
alternatively cluster the source using the <code><a href="../Other Constants.html#/c:@MGLShapeSourceOptionClustered">MGLShapeSourceOptionClustered</a></code>
option and render the data using an <code><a href="../Classes/MGLCircleStyleLayer.html">MGLCircleStyleLayer</a></code> or
<code><a href="../Classes/MGLSymbolStyleLayer.html">MGLSymbolStyleLayer</a></code>.</p>

<p>You can access an existing heatmap style layer using the
<code><a href="../Classes/MGLStyle.html#/c:objc(cs)MGLStyle(im)layerWithIdentifier:">-[MGLStyle layerWithIdentifier:]</a></code> method if you know its identifier;
otherwise, find it using the <code><a href="../Classes/MGLStyle.html#/c:objc(cs)MGLStyle(py)layers">MGLStyle.layers</a></code> property. You can also create a
new heatmap style layer and add it to the style using a method such as
<code><a href="../Classes/MGLStyle.html#/c:objc(cs)MGLStyle(im)addLayer:">-[MGLStyle addLayer:]</a></code>.</p>
<h3 id='example' class='heading'>Example</h3>
<pre class="highlight swift"><code><span class="k">let</span> <span class="nv">layer</span> <span class="o">=</span> <span class="kt">MGLHeatmapStyleLayer</span><span class="p">(</span><span class="nv">identifier</span><span class="p">:</span> <span class="s">"earthquake-heat"</span><span class="p">,</span> <span class="nv">source</span><span class="p">:</span> <span class="n">earthquakes</span><span class="p">)</span>
<span class="n">layer</span><span class="o">.</span><span class="n">heatmapWeight</span> <span class="o">=</span> <span class="kt">NSExpression</span><span class="p">(</span><span class="nv">format</span><span class="p">:</span> <span class="s">"mgl_interpolate:withCurveType:parameters:stops:(magnitude, 'linear', nil, %@)"</span><span class="p">,</span>
                                   <span class="p">[</span><span class="mi">0</span><span class="p">:</span> <span class="mi">0</span><span class="p">,</span>
                                    <span class="mi">6</span><span class="p">:</span> <span class="mi">1</span><span class="p">])</span>
<span class="n">layer</span><span class="o">.</span><span class="n">heatmapIntensity</span> <span class="o">=</span> <span class="kt">NSExpression</span><span class="p">(</span><span class="nv">format</span><span class="p">:</span> <span class="s">"mgl_interpolate:withCurveType:parameters:stops:($zoomLevel, 'linear', nil, %@)"</span><span class="p">,</span>
                                      <span class="p">[</span><span class="mi">0</span><span class="p">:</span> <span class="mi">1</span><span class="p">,</span>
                                       <span class="mi">9</span><span class="p">:</span> <span class="mi">3</span><span class="p">])</span>
<span class="n">mapView</span><span class="o">.</span><span class="n">style</span><span class="p">?</span><span class="o">.</span><span class="nf">addLayer</span><span class="p">(</span><span class="n">layer</span><span class="p">)</span>
</code></pre>

          </div>
        </section>

        <section class="section">
          <div class="section-content">
            <div class="task-group">
              <ul class="item-container">
                <li class="item">
                  <div>
                    <code>
                    <a name="/c:objc(cs)MGLHeatmapStyleLayer(im)initWithIdentifier:source:"></a>
                    <a name="//apple_ref/objc/Method/-initWithIdentifier:source:" class="dashAnchor"></a>
                    <a class="token" href="#/c:objc(cs)MGLHeatmapStyleLayer(im)initWithIdentifier:source:"><span class="token-name">-initWithIdentifier:source:</span><span class="token-icon" /></a>
                    </code>
                  </div>
                  <div class="height-container">
                    <section class="section">
                      <div class="abstract">
                        <p>Returns a heatmap style layer initialized with an identifier and source.</p>

<p>After initializing and configuring the style layer, add it to a map view’s
style using the <code><a href="../Classes/MGLStyle.html#/c:objc(cs)MGLStyle(im)addLayer:">-[MGLStyle addLayer:]</a></code> or
<code><a href="../Classes/MGLStyle.html#/c:objc(cs)MGLStyle(im)insertLayer:belowLayer:">-[MGLStyle insertLayer:belowLayer:]</a></code> method.</p>

                      </div>
                      <div class="declaration">
                        <h4>Declaration</h4>
                        <div class="language keyline-blue">
                          <p  style="background: rgba(65, 131, 196, 0.15);" class="aside-title text-blue">Objective-C</p>
                          <pre class="highlight objective_c"><code><span class="k">-</span> <span class="p">(</span><span class="n">nonnull</span> <span class="n">instancetype</span><span class="p">)</span><span class="nf">initWithIdentifier</span><span class="p">:(</span><span class="n">nonnull</span> <span class="n">NSString</span> <span class="o">*</span><span class="p">)</span><span class="nv">identifier</span>
                                    <span class="nf">source</span><span class="p">:(</span><span class="n">nonnull</span> <span class="n"><a href="../Classes/MGLSource.html">MGLSource</a></span> <span class="o">*</span><span class="p">)</span><span class="nv">source</span><span class="p">;</span></code></pre>

                        </div>
                        <div class="language keyline-purple">
                          <p style="background: rgba(149, 149, 209, 0.21);" class="aside-title text-purple">Swift</p>
                          <pre class="highlight swift"><code><span class="nf">init</span><span class="p">(</span><span class="nv">identifier</span><span class="p">:</span> <span class="kt">String</span><span class="p">,</span> <span class="nv">source</span><span class="p">:</span> <span class="kt"><a href="../Classes/MGLSource.html">MGLSource</a></span><span class="p">)</span></code></pre>

                        </div>
                      </div>
                      <div>
                        <h4>Parameters</h4>
                        <table class="graybox">
                          <tbody>
                            <tr>
                              <td>
                                <code>
                                  identifier
                                </code>
                              </td>
                              <td>
                                <div>
                                  <p>A string that uniquely identifies the source in the style to
which it is added.</p>
                                </div>
                              </td>
                            </tr>
                            <tr>
                              <td>
                                <code>
                                  source
                                </code>
                              </td>
                              <td>
                                <div>
                                  <p>The source from which to obtain the data to style. If the source
has not yet been added to the current style, the behavior is undefined.</p>
                                </div>
                              </td>
                            </tr>
                          </tbody>
                        </table>
                      </div>
                      <div>
                        <h4>Return Value</h4>
                        <p>An initialized foreground style layer.</p>
                      </div>
                      <div class="show-on-github">
                        <a href="https://github.com/mapbox/mapbox-gl-native/tree/macos-v0.9.0/platform/darwin/src/MGLHeatmapStyleLayer.h#L64">
                          <img style="margin-bottom: 1px;" class="show-on-github-icon" src="../img/github.svg"/>
                          View Source on GitHub
                        </a>
                      </div>
                    </section>
                  </div>
                </li>
              </ul>
            </div>
            <div class="task-group">
              <div class="task-name-container">
                <a name="/Accessing%20the%20Paint%20Attributes"></a>
                <a name="//apple_ref/objc/Section/Accessing the Paint Attributes" class="dashAnchor"></a>
                <a href="#/Accessing%20the%20Paint%20Attributes">
                  <h3 id="Accessing%20the%20Paint%20Attributes" class="section-name">Accessing the Paint Attributes<span class="anchor-icon" /></h3>
                </a>
              </div>
              <ul class="item-container">
                <li class="item">
                  <div>
                    <code>
                    <a name="/c:objc(cs)MGLHeatmapStyleLayer(py)heatmapColor"></a>
                    <a name="//apple_ref/objc/Property/heatmapColor" class="dashAnchor"></a>
                    <a class="token" href="#/c:objc(cs)MGLHeatmapStyleLayer(py)heatmapColor"><span class="token-name">heatmapColor</span><span class="token-icon" /></a>
                    </code>
                  </div>
                  <div class="height-container">
                    <section class="section">
                      <div class="abstract">
                        <p>The color of each screen point based on its density value in a heatmap. This
property is normally set to an interpolation or step expression with the
<code>$heatmapDensity</code> value as its input.</p>

<p>The default value of this property is an expression that evaluates to a rainbow
color scale from blue to red. Set this property to <code>nil</code> to reset it to the
default value.</p>

<p>You can set this property to an expression containing any of the following:</p>

<ul>
<li>Constant <code>NSColor</code> values</li>
<li>Predefined functions, including mathematical and string operators</li>
<li>Conditional expressions</li>
<li>Variable assignments and references to assigned variables</li>
<li>Interpolation and step functions applied to the <code>$heatmapDensity</code> variable</li>
</ul>

<p>This property does not support applying interpolation or step functions to
feature attributes.</p>

                      </div>
                      <div class="declaration">
                        <h4>Declaration</h4>
                        <div class="language keyline-blue">
                          <p  style="background: rgba(65, 131, 196, 0.15);" class="aside-title text-blue">Objective-C</p>
                          <pre class="highlight objective_c"><code><span class="k">@property</span> <span class="p">(</span><span class="n">assign</span><span class="p">,</span> <span class="n">readwrite</span><span class="p">,</span> <span class="n">nonatomic</span><span class="p">,</span> <span class="n">null_resettable</span><span class="p">)</span>
    <span class="n">NSExpression</span> <span class="o">*</span><span class="n">heatmapColor</span><span class="p">;</span></code></pre>

                        </div>
                        <div class="language keyline-purple">
                          <p style="background: rgba(149, 149, 209, 0.21);" class="aside-title text-purple">Swift</p>
                          <pre class="highlight swift"><code><span class="k">var</span> <span class="nv">heatmapColor</span><span class="p">:</span> <span class="kt">NSExpression</span><span class="o">!</span> <span class="p">{</span> <span class="k">get</span> <span class="k">set</span> <span class="p">}</span></code></pre>

                        </div>
                      </div>
                      <div class="show-on-github">
                        <a href="https://github.com/mapbox/mapbox-gl-native/tree/macos-v0.9.0/platform/darwin/src/MGLHeatmapStyleLayer.h#L111">
                          <img style="margin-bottom: 1px;" class="show-on-github-icon" src="../img/github.svg"/>
                          View Source on GitHub
                        </a>
                      </div>
                    </section>
                  </div>
                </li>
                <li class="item">
                  <div>
                    <code>
                    <a name="/c:objc(cs)MGLHeatmapStyleLayer(py)heatmapIntensity"></a>
                    <a name="//apple_ref/objc/Property/heatmapIntensity" class="dashAnchor"></a>
                    <a class="token" href="#/c:objc(cs)MGLHeatmapStyleLayer(py)heatmapIntensity"><span class="token-name">heatmapIntensity</span><span class="token-icon" /></a>
                    </code>
                  </div>
                  <div class="height-container">
                    <section class="section">
                      <div class="abstract">
                        <p>Similar to <code><a href="../Classes/MGLHeatmapStyleLayer.html#/c:objc(cs)MGLHeatmapStyleLayer(py)heatmapWeight">heatmapWeight</a></code> but controls the intensity of the heatmap globally.
Primarily used for adjusting the heatmap based on zoom level.</p>

<p>The default value of this property is an expression that evaluates to the float
<code>1</code>. Set this property to <code>nil</code> to reset it to the default value.</p>

<p>You can set this property to an expression containing any of the following:</p>

<ul>
<li>Constant numeric values no less than 0</li>
<li>Predefined functions, including mathematical and string operators</li>
<li>Conditional expressions</li>
<li>Variable assignments and references to assigned variables</li>
<li>Interpolation and step functions applied to the <code>$zoomLevel</code> variable</li>
</ul>

<p>This property does not support applying interpolation or step functions to
feature attributes.</p>

                      </div>
                      <div class="declaration">
                        <h4>Declaration</h4>
                        <div class="language keyline-blue">
                          <p  style="background: rgba(65, 131, 196, 0.15);" class="aside-title text-blue">Objective-C</p>
                          <pre class="highlight objective_c"><code><span class="k">@property</span> <span class="p">(</span><span class="n">assign</span><span class="p">,</span> <span class="n">readwrite</span><span class="p">,</span> <span class="n">nonatomic</span><span class="p">,</span> <span class="n">null_resettable</span><span class="p">)</span>
    <span class="n">NSExpression</span> <span class="o">*</span><span class="n">heatmapIntensity</span><span class="p">;</span></code></pre>

                        </div>
                        <div class="language keyline-purple">
                          <p style="background: rgba(149, 149, 209, 0.21);" class="aside-title text-purple">Swift</p>
                          <pre class="highlight swift"><code><span class="k">var</span> <span class="nv">heatmapIntensity</span><span class="p">:</span> <span class="kt">NSExpression</span><span class="o">!</span> <span class="p">{</span> <span class="k">get</span> <span class="k">set</span> <span class="p">}</span></code></pre>

                        </div>
                      </div>
                      <div class="show-on-github">
                        <a href="https://github.com/mapbox/mapbox-gl-native/tree/macos-v0.9.0/platform/darwin/src/MGLHeatmapStyleLayer.h#L132">
                          <img style="margin-bottom: 1px;" class="show-on-github-icon" src="../img/github.svg"/>
                          View Source on GitHub
                        </a>
                      </div>
                    </section>
                  </div>
                </li>
                <li class="item">
                  <div>
                    <code>
                    <a name="/c:objc(cs)MGLHeatmapStyleLayer(py)heatmapIntensityTransition"></a>
                    <a name="//apple_ref/objc/Property/heatmapIntensityTransition" class="dashAnchor"></a>
                    <a class="token" href="#/c:objc(cs)MGLHeatmapStyleLayer(py)heatmapIntensityTransition"><span class="token-name">heatmapIntensityTransition</span><span class="token-icon" /></a>
                    </code>
                  </div>
                  <div class="height-container">
                    <section class="section">
                      <div class="abstract">
                        <p>The transition affecting any changes to this layer’s <code><a href="../Classes/MGLHeatmapStyleLayer.html#/c:objc(cs)MGLHeatmapStyleLayer(py)heatmapIntensity">heatmapIntensity</a></code> property.</p>

<p>This property corresponds to the <code>heatmap-intensity-transition</code> property in the style JSON file format.</p>

                      </div>
                      <div class="declaration">
                        <h4>Declaration</h4>
                        <div class="language keyline-blue">
                          <p  style="background: rgba(65, 131, 196, 0.15);" class="aside-title text-blue">Objective-C</p>
                          <pre class="highlight objective_c"><code><span class="k">@property</span> <span class="p">(</span><span class="n">assign</span><span class="p">,</span> <span class="n">readwrite</span><span class="p">,</span> <span class="n">nonatomic</span><span class="p">)</span>
    <span class="n"><a href="../Structs/MGLTransition.html">MGLTransition</a></span> <span class="n">heatmapIntensityTransition</span><span class="p">;</span></code></pre>

                        </div>
                        <div class="language keyline-purple">
                          <p style="background: rgba(149, 149, 209, 0.21);" class="aside-title text-purple">Swift</p>
                          <pre class="highlight swift"><code><span class="k">var</span> <span class="nv">heatmapIntensityTransition</span><span class="p">:</span> <span class="kt"><a href="../Structs/MGLTransition.html">MGLTransition</a></span> <span class="p">{</span> <span class="k">get</span> <span class="k">set</span> <span class="p">}</span></code></pre>

                        </div>
                      </div>
                      <div class="show-on-github">
                        <a href="https://github.com/mapbox/mapbox-gl-native/tree/macos-v0.9.0/platform/darwin/src/MGLHeatmapStyleLayer.h#L139">
                          <img style="margin-bottom: 1px;" class="show-on-github-icon" src="../img/github.svg"/>
                          View Source on GitHub
                        </a>
                      </div>
                    </section>
                  </div>
                </li>
                <li class="item">
                  <div>
                    <code>
                    <a name="/c:objc(cs)MGLHeatmapStyleLayer(py)heatmapOpacity"></a>
                    <a name="//apple_ref/objc/Property/heatmapOpacity" class="dashAnchor"></a>
                    <a class="token" href="#/c:objc(cs)MGLHeatmapStyleLayer(py)heatmapOpacity"><span class="token-name">heatmapOpacity</span><span class="token-icon" /></a>
                    </code>
                  </div>
                  <div class="height-container">
                    <section class="section">
                      <div class="abstract">
                        <p>The global opacity at which the heatmap layer will be drawn.</p>

<p>The default value of this property is an expression that evaluates to the float
<code>1</code>. Set this property to <code>nil</code> to reset it to the default value.</p>

<p>You can set this property to an expression containing any of the following:</p>

<ul>
<li>Constant numeric values between 0 and 1 inclusive</li>
<li>Predefined functions, including mathematical and string operators</li>
<li>Conditional expressions</li>
<li>Variable assignments and references to assigned variables</li>
<li>Interpolation and step functions applied to the <code>$zoomLevel</code> variable</li>
</ul>

<p>This property does not support applying interpolation or step functions to
feature attributes.</p>

                      </div>
                      <div class="declaration">
                        <h4>Declaration</h4>
                        <div class="language keyline-blue">
                          <p  style="background: rgba(65, 131, 196, 0.15);" class="aside-title text-blue">Objective-C</p>
                          <pre class="highlight objective_c"><code><span class="k">@property</span> <span class="p">(</span><span class="n">assign</span><span class="p">,</span> <span class="n">readwrite</span><span class="p">,</span> <span class="n">nonatomic</span><span class="p">,</span> <span class="n">null_resettable</span><span class="p">)</span>
    <span class="n">NSExpression</span> <span class="o">*</span><span class="n">heatmapOpacity</span><span class="p">;</span></code></pre>

                        </div>
                        <div class="language keyline-purple">
                          <p style="background: rgba(149, 149, 209, 0.21);" class="aside-title text-purple">Swift</p>
                          <pre class="highlight swift"><code><span class="k">var</span> <span class="nv">heatmapOpacity</span><span class="p">:</span> <span class="kt">NSExpression</span><span class="o">!</span> <span class="p">{</span> <span class="k">get</span> <span class="k">set</span> <span class="p">}</span></code></pre>

                        </div>
                      </div>
                      <div class="show-on-github">
                        <a href="https://github.com/mapbox/mapbox-gl-native/tree/macos-v0.9.0/platform/darwin/src/MGLHeatmapStyleLayer.h#L158">
                          <img style="margin-bottom: 1px;" class="show-on-github-icon" src="../img/github.svg"/>
                          View Source on GitHub
                        </a>
                      </div>
                    </section>
                  </div>
                </li>
                <li class="item">
                  <div>
                    <code>
                    <a name="/c:objc(cs)MGLHeatmapStyleLayer(py)heatmapOpacityTransition"></a>
                    <a name="//apple_ref/objc/Property/heatmapOpacityTransition" class="dashAnchor"></a>
                    <a class="token" href="#/c:objc(cs)MGLHeatmapStyleLayer(py)heatmapOpacityTransition"><span class="token-name">heatmapOpacityTransition</span><span class="token-icon" /></a>
                    </code>
                  </div>
                  <div class="height-container">
                    <section class="section">
                      <div class="abstract">
                        <p>The transition affecting any changes to this layer’s <code><a href="../Classes/MGLHeatmapStyleLayer.html#/c:objc(cs)MGLHeatmapStyleLayer(py)heatmapOpacity">heatmapOpacity</a></code> property.</p>

<p>This property corresponds to the <code>heatmap-opacity-transition</code> property in the style JSON file format.</p>

                      </div>
                      <div class="declaration">
                        <h4>Declaration</h4>
                        <div class="language keyline-blue">
                          <p  style="background: rgba(65, 131, 196, 0.15);" class="aside-title text-blue">Objective-C</p>
                          <pre class="highlight objective_c"><code><span class="k">@property</span> <span class="p">(</span><span class="n">assign</span><span class="p">,</span> <span class="n">readwrite</span><span class="p">,</span> <span class="n">nonatomic</span><span class="p">)</span> <span class="n"><a href="../Structs/MGLTransition.html">MGLTransition</a></span> <span class="n">heatmapOpacityTransition</span><span class="p">;</span></code></pre>

                        </div>
                        <div class="language keyline-purple">
                          <p style="background: rgba(149, 149, 209, 0.21);" class="aside-title text-purple">Swift</p>
                          <pre class="highlight swift"><code><span class="k">var</span> <span class="nv">heatmapOpacityTransition</span><span class="p">:</span> <span class="kt"><a href="../Structs/MGLTransition.html">MGLTransition</a></span> <span class="p">{</span> <span class="k">get</span> <span class="k">set</span> <span class="p">}</span></code></pre>

                        </div>
                      </div>
                      <div class="show-on-github">
                        <a href="https://github.com/mapbox/mapbox-gl-native/tree/macos-v0.9.0/platform/darwin/src/MGLHeatmapStyleLayer.h#L165">
                          <img style="margin-bottom: 1px;" class="show-on-github-icon" src="../img/github.svg"/>
                          View Source on GitHub
                        </a>
                      </div>
                    </section>
                  </div>
                </li>
                <li class="item">
                  <div>
                    <code>
                    <a name="/c:objc(cs)MGLHeatmapStyleLayer(py)heatmapRadius"></a>
                    <a name="//apple_ref/objc/Property/heatmapRadius" class="dashAnchor"></a>
                    <a class="token" href="#/c:objc(cs)MGLHeatmapStyleLayer(py)heatmapRadius"><span class="token-name">heatmapRadius</span><span class="token-icon" /></a>
                    </code>
                  </div>
                  <div class="height-container">
                    <section class="section">
                      <div class="abstract">
                        <p>Radius of influence of one heatmap point in points. Increasing the value makes
the heatmap smoother, but less detailed.</p>

<p>This property is measured in points.</p>

<p>The default value of this property is an expression that evaluates to the float
<code>30</code>. Set this property to <code>nil</code> to reset it to the default value.</p>

<p>You can set this property to an expression containing any of the following:</p>

<ul>
<li>Constant numeric values no less than 1</li>
<li>Predefined functions, including mathematical and string operators</li>
<li>Conditional expressions</li>
<li>Variable assignments and references to assigned variables</li>
<li>Interpolation and step functions applied to the <code>$zoomLevel</code> variable and/or
feature attributes</li>
</ul>

                      </div>
                      <div class="declaration">
                        <h4>Declaration</h4>
                        <div class="language keyline-blue">
                          <p  style="background: rgba(65, 131, 196, 0.15);" class="aside-title text-blue">Objective-C</p>
                          <pre class="highlight objective_c"><code><span class="k">@property</span> <span class="p">(</span><span class="n">assign</span><span class="p">,</span> <span class="n">readwrite</span><span class="p">,</span> <span class="n">nonatomic</span><span class="p">,</span> <span class="n">null_resettable</span><span class="p">)</span>
    <span class="n">NSExpression</span> <span class="o">*</span><span class="n">heatmapRadius</span><span class="p">;</span></code></pre>

                        </div>
                        <div class="language keyline-purple">
                          <p style="background: rgba(149, 149, 209, 0.21);" class="aside-title text-purple">Swift</p>
                          <pre class="highlight swift"><code><span class="k">var</span> <span class="nv">heatmapRadius</span><span class="p">:</span> <span class="kt">NSExpression</span><span class="o">!</span> <span class="p">{</span> <span class="k">get</span> <span class="k">set</span> <span class="p">}</span></code></pre>

                        </div>
                      </div>
                      <div class="show-on-github">
                        <a href="https://github.com/mapbox/mapbox-gl-native/tree/macos-v0.9.0/platform/darwin/src/MGLHeatmapStyleLayer.h#L185">
                          <img style="margin-bottom: 1px;" class="show-on-github-icon" src="../img/github.svg"/>
                          View Source on GitHub
                        </a>
                      </div>
                    </section>
                  </div>
                </li>
                <li class="item">
                  <div>
                    <code>
                    <a name="/c:objc(cs)MGLHeatmapStyleLayer(py)heatmapRadiusTransition"></a>
                    <a name="//apple_ref/objc/Property/heatmapRadiusTransition" class="dashAnchor"></a>
                    <a class="token" href="#/c:objc(cs)MGLHeatmapStyleLayer(py)heatmapRadiusTransition"><span class="token-name">heatmapRadiusTransition</span><span class="token-icon" /></a>
                    </code>
                  </div>
                  <div class="height-container">
                    <section class="section">
                      <div class="abstract">
                        <p>The transition affecting any changes to this layer’s <code><a href="../Classes/MGLHeatmapStyleLayer.html#/c:objc(cs)MGLHeatmapStyleLayer(py)heatmapRadius">heatmapRadius</a></code> property.</p>

<p>This property corresponds to the <code>heatmap-radius-transition</code> property in the style JSON file format.</p>

                      </div>
                      <div class="declaration">
                        <h4>Declaration</h4>
                        <div class="language keyline-blue">
                          <p  style="background: rgba(65, 131, 196, 0.15);" class="aside-title text-blue">Objective-C</p>
                          <pre class="highlight objective_c"><code><span class="k">@property</span> <span class="p">(</span><span class="n">assign</span><span class="p">,</span> <span class="n">readwrite</span><span class="p">,</span> <span class="n">nonatomic</span><span class="p">)</span> <span class="n"><a href="../Structs/MGLTransition.html">MGLTransition</a></span> <span class="n">heatmapRadiusTransition</span><span class="p">;</span></code></pre>

                        </div>
                        <div class="language keyline-purple">
                          <p style="background: rgba(149, 149, 209, 0.21);" class="aside-title text-purple">Swift</p>
                          <pre class="highlight swift"><code><span class="k">var</span> <span class="nv">heatmapRadiusTransition</span><span class="p">:</span> <span class="kt"><a href="../Structs/MGLTransition.html">MGLTransition</a></span> <span class="p">{</span> <span class="k">get</span> <span class="k">set</span> <span class="p">}</span></code></pre>

                        </div>
                      </div>
                      <div class="show-on-github">
                        <a href="https://github.com/mapbox/mapbox-gl-native/tree/macos-v0.9.0/platform/darwin/src/MGLHeatmapStyleLayer.h#L192">
                          <img style="margin-bottom: 1px;" class="show-on-github-icon" src="../img/github.svg"/>
                          View Source on GitHub
                        </a>
                      </div>
                    </section>
                  </div>
                </li>
                <li class="item">
                  <div>
                    <code>
                    <a name="/c:objc(cs)MGLHeatmapStyleLayer(py)heatmapWeight"></a>
                    <a name="//apple_ref/objc/Property/heatmapWeight" class="dashAnchor"></a>
                    <a class="token" href="#/c:objc(cs)MGLHeatmapStyleLayer(py)heatmapWeight"><span class="token-name">heatmapWeight</span><span class="token-icon" /></a>
                    </code>
                  </div>
                  <div class="height-container">
                    <section class="section">
                      <div class="abstract">
                        <p>A measure of how much an individual point contributes to the heatmap. A value
of 10 would be equivalent to having 10 points of weight 1 in the same spot.
Especially useful when combined with clustering.</p>

<p>The default value of this property is an expression that evaluates to the float
<code>1</code>. Set this property to <code>nil</code> to reset it to the default value.</p>

<p>You can set this property to an expression containing any of the following:</p>

<ul>
<li>Constant numeric values no less than 0</li>
<li>Predefined functions, including mathematical and string operators</li>
<li>Conditional expressions</li>
<li>Variable assignments and references to assigned variables</li>
<li>Interpolation and step functions applied to the <code>$zoomLevel</code> variable and/or
feature attributes</li>
</ul>

                      </div>
                      <div class="declaration">
                        <h4>Declaration</h4>
                        <div class="language keyline-blue">
                          <p  style="background: rgba(65, 131, 196, 0.15);" class="aside-title text-blue">Objective-C</p>
                          <pre class="highlight objective_c"><code><span class="k">@property</span> <span class="p">(</span><span class="n">assign</span><span class="p">,</span> <span class="n">readwrite</span><span class="p">,</span> <span class="n">nonatomic</span><span class="p">,</span> <span class="n">null_resettable</span><span class="p">)</span>
    <span class="n">NSExpression</span> <span class="o">*</span><span class="n">heatmapWeight</span><span class="p">;</span></code></pre>

                        </div>
                        <div class="language keyline-purple">
                          <p style="background: rgba(149, 149, 209, 0.21);" class="aside-title text-purple">Swift</p>
                          <pre class="highlight swift"><code><span class="k">var</span> <span class="nv">heatmapWeight</span><span class="p">:</span> <span class="kt">NSExpression</span><span class="o">!</span> <span class="p">{</span> <span class="k">get</span> <span class="k">set</span> <span class="p">}</span></code></pre>

                        </div>
                      </div>
                      <div class="show-on-github">
                        <a href="https://github.com/mapbox/mapbox-gl-native/tree/macos-v0.9.0/platform/darwin/src/MGLHeatmapStyleLayer.h#L211">
                          <img style="margin-bottom: 1px;" class="show-on-github-icon" src="../img/github.svg"/>
                          View Source on GitHub
                        </a>
                      </div>
                    </section>
                  </div>
                </li>
              </ul>
            </div>
          </div>
        </section>

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