I'm new to PostGIS and I see there are so many options, it's a bit overwhelming.
I want to simply find all geo points (stored in ISO 6709 format) within a certain angle of a given geopoint.
For example, given a geopoint "+25 -90", find all geopoints within 5degrees angle of that geo point, that is:
- +25+/-5 degrees -> 20 to 30 degrees latitude
- -90+/-5 degrees -> -85 to -95 degrees longitude
What's the easiest way to achieve this query?