Being able to project between spatial references is fundamental to a GIS. An example of when you would need to re-project data is if you had data in two different spatial references, but wanted to perform an intersect analysis with the GeometryEngine::intersect function. This function takes two geometries as parameters, and both geometries must be in the same spatial reference. If they are not, you could first use GeometryEngine::project to convert the geometries so they match.
Click anywhere on the map. A callout will display the clicked location's coordinate in the original (basemap's) spatial reference and in the projected spatial reference.
To project a geometry to another spatial reference:
- Call the static method,
GeometryEngine.project, passing in the originalGeometryand aSpatialReferenceto project to.
- GeometryEngine
- Point
- SpatialReference
Edit and Manage Data GeometryEngine