I am trying to write a GeoSPARQL using the geometry column of a layer imported from QGIS to PostGIS. The format of the geometry column is hexadecimal representation of a binary. When I try to use geo:aswkt it doesn't work and return empty results.

?geometry geo:asWKT ?wkt_representation .
  • 2
    You're converting on the wrong side. ST_AsText() belongs in the SQL statement.
    – Vince
    Commented Feb 12 at 13:33
  • if i converted using ST_AsText() in SQL , would i be able to use GeoSPARQL functions like geof:sfWithin?
    – BHH
    Commented Feb 12 at 13:38
  • 1
    That's a question for GeoSPARQL documentation, surely. If you need WKT input, you need to generate it before input.
    – Vince
    Commented Feb 12 at 14:17


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