I have a csv table. Each record includes a start node (lat1,lon1) and an end node (lat2,lon2). I have already imported the .csv into Postgresql 8.4. Now I would like set the geometry column. I tried to use this sql statement:
UPDATE mytable SET the_geom = ST_GeomFromText('POINT(' || lat1 || ' ' || lon1 || ' ' || lat2 || ' ' || lon2 || ')',4326);
but I receive this warning message: WARNING: OGC WKT expected, EWKT provided - use GeomFromEWKT() for this ERROR: new row for relation "mytable" violates check constraint "enforce_dims_the_geom"
Do you have any idea on how to add geometries in my case?
Thank you Selini