Geographic Information Systems Stack Exchange is a question and answer site for cartographers, geographers and GIS professionals. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I am using proj4s.js for transforming between coordinate systems for a GIS web application. Is there any documentation out there on transformations accuracy provided by the library?

share|improve this question
I think its a very good question. Transformations can have a lot of math operations and rounding errors could stack up. I think though that for uses like web cartography, its more than enough. But I wouldn't use it where i need great precision (0.00x meter) – U2ros Nov 1 '12 at 19:45

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.