I'm working on simple GTS system and one of the task is calculate distance. Usually GPS tracker sends coordinates as Lon , Lat. It is easy to understands by navigator, but not a citizen. Brute force conversation requires knowledge of geography, mathematic etc. Django and PostGIS have simple and elegant solution: example model: from django.contrib.gis.db import models as gismodels class Points(models.Model): """ Simple class with one Point only """ Point = gismodels.PointField() view.py pointlist is array of the points containing geo data: for point in pointlist: plist.append(point.Point) try: linestring = LineString(plist) linestring.srid=4326 linestring.transform(22186) ...