The World Coordinate Converter

Loading, please, be patient...
Loading, please, be patient...

1. Search the Proj4js format on Spatial Reference:
Ex: European Datum 1950


2. Come-back and add the new reference system definition in TWCC:


3. You use this system frequently?
Contact us and we will add it to TWCC permanently!

Contact us

Search form

Search result

Please fill out the form below.


What is TWCC?

TWCC, "The World Coordinate Converter", is an Open Source tool to convert geodetic coordinates in a wide range of reference systems.

Several coordinate conversion tools already exist, however, here is what makes the strength of TWCC:

TWCC was created by Clément Ronzon following research and development carried out for

Special thanks to: Roland Aigner, Alessandro Avaro, Leszek Pawlowicz, Lê Viết Thanh, Ahmed Qatar.

For any questions or suggestions please contact us.

You can donate to support this initiative.

User satisfaction survey

Contact us

We need your help!

We rely on the generous support of TWCC users to continue maintaining and improving this free web site.
Your money can make a difference and support the fund today.

How we plan to use funds:

Thank you donors!
List of the last five donors:
  1. Chris Dickeson
  2. Cyril Calestani
  3. Ramon Carrillo Symonds
  4. Bjørn Tore Dalva
  5. Ionut Alexandru
Don't show this message again.