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GeometryEngineProject Method (Geometry, SpatialReference, DatumTransformation)

Projects the given geometry from its current spatial reference system into the given output spatial reference system, applying the datum transformation provided.

Namespace:  Esri.ArcGISRuntime.Geometry
Assembly:  Esri.ArcGISRuntime (in Esri.ArcGISRuntime.dll) Version:
public static Geometry Project(
	Geometry geometry,
	SpatialReference outputSpatialReference,
	DatumTransformation datumTransformation


Type: Esri.ArcGISRuntime.GeometryGeometry
The geometry to be projected.
Type: Esri.ArcGISRuntime.GeometrySpatialReference
The spatial reference to which geometry need to be projected.
Type: Esri.ArcGISRuntime.GeometryDatumTransformation
The datum transformation that describes how coordinates are converted from one geographic coordinate system to another.

Return Value

Type: Geometry
The projected geometry.


Example Name: ProjectWithSpecificTransformation

This sample demonstrates how to use the GeometryEngine with a specified geographic transformation to transform a geometry from one coordinate system to another.

Code example screen shot.

// Copyright 2018 Esri.
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License.
// You may obtain a copy of the License at:
// Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific
// language governing permissions and limitations under the License.

using Esri.ArcGISRuntime.Geometry;
using System;

namespace ArcGISRuntime.WPF.Samples.ProjectWithSpecificTransformation
        "Project with specific transformation",
        "This sample demonstrates how to use the GeometryEngine with a specified geographic transformation to transform a geometry from one coordinate system to another. ",
        "See [Coordinate Systems and Transformations]( for more information about geographic coordinate systems, geographic transformations, and projected coordinate systems. ")]
    public partial class ProjectWithSpecificTransformation
        public ProjectWithSpecificTransformation()


        private void Initialize()
            // Create a point geometry in NYC in WGS84
            MapPoint startingPoint = new MapPoint(-73.984513, 40.748469, SpatialReferences.Wgs84);

            // Update the UI with the initial coordinates
            BeforeLabel.Content = String.Format("x: {0}, y: {1}", startingPoint.X, startingPoint.Y);

            // Create a geographic transformation step for transform WKID 108055, WGS_1984_To_MSK_1942
            GeographicTransformationStep geoStep = new GeographicTransformationStep(108055);

            // Create the transformation
            GeographicTransformation geoTransform = new GeographicTransformation(geoStep);

            // Project to a coordinate system used in New York, NAD_1983_HARN_StatePlane_New_York_Central_FIPS_3102
            MapPoint afterPoint = (MapPoint)GeometryEngine.Project(startingPoint, SpatialReference.Create(2829), geoTransform);

            // Update the UI with the projected coordinates
            AfterLabel.Content = String.Format("x: {0}, y: {1}", afterPoint.X, afterPoint.Y);

            // Perform the same projection without specified transformation
            MapPoint unspecifiedTransformPoint = (MapPoint)GeometryEngine.Project(startingPoint, SpatialReference.Create(2829));

            // Update the UI with the projection done without specific transform for comparison purposes
            NonSpecificLabel.Content = String.Format("x: {0}, y: {1}", unspecifiedTransformPoint.X, unspecifiedTransformPoint.Y);
<UserControl x:Class="ArcGISRuntime.WPF.Samples.ProjectWithSpecificTransformation.ProjectWithSpecificTransformation"
        <Label Content="Geometry before (WGS 84):" />
        <Label x:Name="BeforeLabel" />
        <Label Content="Geometry to NAD_1983_HARN_StatePlane_New_York_Central_FIPS_3102 after WGS_1984_To_MSK_1942:" />
        <Label x:Name="AfterLabel" />
        <Label Content="Geometry to NAD_1983_HARN_StatePlane_New_York_Central_FIPS_3102 after (without specific transform)" />
        <Label x:Name="NonSpecificLabel" />
See Also
Additional Examples
Hyperlink to ExampleDescription
ListTransformationsThis sample demonstrates how to use the TransformationCatalog to get a list of available DatumTransformations that can be used to project a Geometry between two different SpatialReferences, and how to use one of the transformations to perform the GeometryEngine.project operation. The TransformationCatalog is also used to set the location of files upon which grid-based transformations depend, and to find the default transformation used for the two SpatialReferences.
ProjectWithSpecificTransformationThis sample demonstrates how to use the GeometryEngine with a specified geographic transformation to transform a geometry from one coordinate system to another.