I'm trying to convert a raster to a polygon and export it from PostGIS as GeoJSON. Specifically I want each pixel to be a polygon with associated the raster value.
PostGIS seems to have a few different functions for converting rasters to polygons, I'm using the ST_PixelAsPolygons function because I want each pixel to be represented as its own polygon.
Example:
SELECT ST_PixelAsPolygon(rast) FROM tbl;
However this returns a set of records for each raster and I can't easily convert this to GeoJSON.
Does anyone know of a simple way to do this?
No comments:
Post a Comment