What would be the best way to get elevation of a coordinate out of a PostGIS database (SQL/plpgsql) given a GeoTIFF dtm file?
Importing as PostGIS Raster (which seems more costly) and calling ST_Value?
Use pgsql-http (https://github.com/pramsey/pgsql-http ) and a cgi which calls gdallocationinfo (GDAL)? Or using pgsql-http to call GDAL/WCS? Other?