Thank you for your interest in the Aspose.GIS product.
Unfortunately, by the moment Aspose.GIS don’t support EsriJson format. I’ve logged GISNET-589, GISNET-590 for layers reading and creating. We will update you here as soon as additional information is available.
Сonsider the below code to export a layer to a another projection.
layer.SaveTo(saveToPath, Drivers.GeoJson, new SavingOptions
SpatialReferenceSystem = SpatialReferenceSystem.WebMercator,
But this simple approach will not work if the projection is missed in the original layer. In that case, see an example from this discussion.