The World Coordinate Converter

© 2022 Clément Ronzon
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1. Select the reference system of your data.

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2. Select the destination reference system.

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3. Enter your coordinates.

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Click on the map.

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Drag and drop the marker.

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Enter an address in the top search bar.

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4. Push to convert your coordinates.

Finish!

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

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

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

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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 GrottoCenter.org.

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

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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
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Credit: International Association of Oil & Gas Producers (OGP)