HI I’m struggling with retuning data from the following query. It should be retuning all data within a 5k radius of a given Longitude, Latitude point.
Select stuff from MyGeoTable where ST_DWithin(ST_GeographyFromText(‘SRID=4326;POINT(LONG,LAT)’), geog,5000)
Is not retuning all data it should be best guess there is an issue with the Geography column this was created from a geometry column which is a collection of points lines and polygons
I tried to recreate the Geography thus
Update MyGeoTable set geog = (ST_Transform(geom,4326));
This gives “ERROR: Geometry type (LINSTRING) dose not match column type (Polygon)”
My question is twofold
1st how can recreate the geography column, check it has worked?
2nd How might perform a similar query just using the geometry the 5k radius doesn’t have to be exact!
This seems like a poor choice of forum for these questions. Of the official PostgreSQL mailing lists -general would be better. But as these types and functions are not part of the core PostgreSQL product these are a bit off-topic for any of these lists. I presume you are using PostGIS and so you should locate a list dedicate to discussing their product.
-admin is mostly about DBA-related stuff like running and configuring a PostgreSQL instance. Schema stuff could qualify (first question) but usually usage questions (2nd question) end up in either -general or -sql if they are agnostic enough.
David J.
