This is probably a simple question, but I'm not very good at PostGIS and don't fully grok all of this. Basically I have a table (nodes) with a POINT column (point). I have created an index on this column create index nodes__points on nodes using gist (point) The column was created with select addgeometrycolumn('nodes', 'points', 'POINT', 4326, 2) I am using srid 4326 because I'm adding data that's
![Distance between 2 POINTs in Postgis in srid 4326 in metres](https://cdn-ak-scissors.b.st-hatena.com/image/square/98d6f053a97a87156775f60757c60865d0f2c47d/height=288;version=1;width=512/https%3A%2F%2Fcdn.sstatic.net%2FSites%2Fstackoverflow%2FImg%2Fapple-touch-icon%402.png%3Fv%3D73d79a89bded)