On Thu, Jun 29, 2006 at 11:15:09PM -0400, blackwater dev wrote: > Does anyone have a good tutorial on finding gps points within a polygon? I > need to be able to pass in a list of gps coordinates and let postgres return > to me matching cities from my cities table that are within that polygon.
PostgreSQL has some basic geometry types and functions, but for more advanced spatial work consider using PostGIS (an add-on to PostgreSQL). The documentation has a "Using PostGIS" chapter with examples. http://www.postgis.org/ -- Michael Fuhr ---------------------------(end of broadcast)--------------------------- TIP 9: In versions below 8.0, the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match