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-rw-r--r--platform/darwin/src/MGLTileSource.h30
1 files changed, 30 insertions, 0 deletions
diff --git a/platform/darwin/src/MGLTileSource.h b/platform/darwin/src/MGLTileSource.h
index 3dc268db60..2d75fa14d8 100644
--- a/platform/darwin/src/MGLTileSource.h
+++ b/platform/darwin/src/MGLTileSource.h
@@ -117,6 +117,7 @@ extern MGL_EXPORT const MGLTileSourceOption MGLTileSourceOptionAttributionInfos;
*/
extern MGL_EXPORT const MGLTileSourceOption MGLTileSourceOptionTileCoordinateSystem;
+
/**
Tile coordinate systems that determine how tile coordinates in tile URLs are
interpreted.
@@ -141,6 +142,35 @@ typedef NS_ENUM(NSUInteger, MGLTileCoordinateSystem) {
MGLTileCoordinateSystemTMS
};
+
+/**
+ An `NSNumber` object containing an unsigned integer that specifies the encoding
+ formula for raster-dem tilesets. The integer corresponds to one of
+ the constants described in `MGLDEMEncoding`.
+
+ The default value for this option is `MGLDEMEncodingMapbox`.
+
+ This option is not supported by the TileJSON spec.
+ */
+extern MGL_EXPORT const MGLTileSourceOption MGLTileSourceOptionDEMEncoding;
+
+/**
+ The encoding formula used to generate the raster-dem tileset
+*/
+
+typedef NS_ENUM(NSUInteger, MGLDEMEncoding) {
+
+ /**
+ Raster tiles generated with the [Mapbox encoding formula](https://www.mapbox.com/help/access-elevation-data/#mapbox-terrain-rgb).
+ */
+ MGLDEMEncodingMapbox = 0,
+
+ /**
+ Raster tiles generated with the [Mapzen Terrarium encoding formula](https://aws.amazon.com/public-datasets/terrain/).
+ */
+ MGLDEMEncodingTerrarium
+};
+
/**
`MGLTileSource` is a map content source that supplies map tiles to be shown on
the map. The location of and metadata about the tiles are defined either by an