GIS and PostGIS#

Tina4 stores geographic points in PostGIS, queries distance in metres, and returns GeoJSON. Coordinates are always [longitude, latitude].

site.location = Tina4::Point.new(18.4241, -33.9249)site.save​nearby = ChargePoint.query  .within_distance("location", [18.42, -33.92], 5_000)  .select_distance("location", [18.42, -33.92])  .order_by_distance("location", [18.42, -33.92])  .get​feature = site.to_feature

PointField maps to geography(Point,4326) and creates a GiST index. Unsupported database engines fail clearly. Tina4::Point.parse accepts coordinate pairs, WKT/EWKT, GeoJSON, or WKB/EWKB and never guesses coordinate order.