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diff --git a/src/location/maps/qgeoprojection2d_p.cpp b/src/location/maps/qgeoprojection2d_p.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtLocation module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** This file may be used under the terms of the GNU Lesser General Public
+** License version 2.1 as published by the Free Software Foundation and
+** appearing in the file LICENSE.LGPL included in the packaging of this
+** file. Please review the following information to ensure the GNU Lesser
+** General Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file. Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#include "qgeoprojection2d_p.h"
+
+#include "qgeocoordinate.h"
+
+#include <QVector2D>
+#include <QVector3D>
+
+#include <qnumeric.h>
+
+QGeoProjection2D::QGeoProjection2D(double baseHeight, double sideLength)
+    : baseHeight_(baseHeight), sideLength_(sideLength) {}
+
+QGeoProjection2D::~QGeoProjection2D() {}
+
+QVector3D QGeoProjection2D::coordToPoint(const QGeoCoordinate &coord) const
+{
+    QVector2D m = coordToMercator(coord);
+    double z = baseHeight_;
+    if (!qIsNaN(coord.altitude()))
+        z += coord.altitude();
+    return QVector3D(m.x() * sideLength_, (1.0 - m.y()) * sideLength_, z);
+}
+
+QGeoCoordinate QGeoProjection2D::pointToCoord(const QVector3D &point) const
+{
+    QVector2D m = QVector2D(point.x() / sideLength_, 1.0 - point.y() / sideLength_);
+    QGeoCoordinate coord = mercatorToCoord(m);
+    coord.setAltitude(point.z() - baseHeight_);
+    return coord;
+}
+
+QVector3D QGeoProjection2D::mercatorToPoint(const QVector2D &mercator) const
+{
+    return QVector3D(mercator.x() * sideLength_, (1.0 - mercator.y()) * sideLength_, baseHeight_);
+}
+
+QVector2D QGeoProjection2D::pointToMercator(const QVector3D &point) const
+{
+    return QVector2D(point.x() / sideLength_, 1.0 - (point.y() / sideLength_));
+}
+
+QGeoCoordinate QGeoProjection2D::interpolate(const QGeoCoordinate &start, const QGeoCoordinate &end, qreal progress)
+{
+    if (start == end) {
+        if (progress < 0.5) {
+            return start;
+        } else {
+            return end;
+        }
+    }
+
+    QGeoCoordinate s2 = start;
+    s2.setAltitude(0.0);
+    QGeoCoordinate e2 = end;
+    e2.setAltitude(0.0);
+    QVector3D s = coordToPoint(s2);
+    QVector3D e = coordToPoint(e2);
+
+    double x = s.x();
+
+    if (sideLength_ / 2.0 < qAbs(e.x() - s.x())) {
+        // handle dateline crossing
+    } else {
+        x = (1.0 - progress) * s.x() + progress * e.x();
+    }
+
+    double y = (1.0 - progress) * s.y() + progress * e.y();
+
+    QGeoCoordinate result = pointToCoord(QVector3D(x, y, 0.0));
+    result.setAltitude((1.0 - progress) * start.altitude() + progress * end.altitude());
+    return result;
+}