Project a point to another spatial reference.
Use case
Being able to project between spatial references is fundamental in 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 static GeometryEngine.intersection(_:_:) method. This method takes two geometries as parameters, and both geometries must be in the same spatial reference. If they are not, you could first use static GeometryEngine.project(_:into:) to convert the geometries so they match.
How to use the sample
Tap anywhere on the map. A callout will display the tapped location’s coordinate in the original basemap’s spatial reference webMercator and in the projected spatial reference wgs84.
How it works
- Call the method,
static GeometryEngine.project(_:into:), passing in the original geometry and a spatial reference system to be projected to.
Relevant API
- GeometryEngine
- Point
- SpatialReference
- static GeometryEngine.project(_:into:)
Additional information
In cases where the output spatial reference uses a different geographic coordinate system than that of the input spatial reference, see the static GeometryEngine.project(_:into:datumTransformation:) method that additionally takes in a DatumTransformation parameter.
Tags
coordinate system, coordinates, latitude, longitude, projected, projection, spatial reference, Web Mercator, WGS 84