# Coordinate Converter(Coordinates from file)

> Source: https://topodrone.com/knowledge/topodrone-post-processing/coordinate-convertercoordinates-from-file/
> Section: TOPODRONE Post Processing
> Updated: 2025-11-26

The tool allows you to convert coordinates from one coordinate system to another using the \*.prj coordinate system file loaded into the program database or the calibration file created earlier in the TOPODRONE Post Processing program. More details about this process can be found in the "Calibration" section. To convert a coordinate catalog from one coordinate system to another, go to the "Tools" menu and select "Coordinate Converter", then "Coordinates from file".

![Coordinate Converter(Coordinates from file)](https://topodrone.com/knowledge/i/94c9af3b270fea3f.jpg)

In the Source section, specify the coordinate catalog file you want to convert, the import start line, and the coordinate separator type.

![Coordinate Converter(Coordinates from file)](https://topodrone.com/knowledge/i/94ac03922c1d53d3.jpg)

Select the coordinate system and elevation type of the original coordinate catalog.

![Coordinate Converter(Coordinates from file)](https://topodrone.com/knowledge/i/5cdc8caecad5ac73.jpg)

Determine whether the columns match the values.

![Coordinate Converter(Coordinates from file)](https://topodrone.com/knowledge/i/d735bede8c019264.jpg)

Specify the coordinate system and elevation type of the target coordinate catalog.

![Coordinate Converter(Coordinates from file)](https://topodrone.com/knowledge/i/c9fa5e920920c70a.jpg)

If you have calibrated in the TOPODRONE Post Processing program, press the "PRJ" button, then press "NO" and select your calibration file.

![Coordinate Converter(Coordinates from file)](https://topodrone.com/knowledge/i/4c5bda3a79c2b1a2.jpg)

After pressing the "Start" button, the right window will display the coordinate catalog in the selected coordinate system. If necessary, click the "Save" button and save the new file.

![Coordinate Converter(Coordinates from file)](https://topodrone.com/knowledge/i/a050faca4bbae007.jpg)

![Coordinate Converter(Coordinates from file)](https://topodrone.com/knowledge/i/b81786d2986d2abe.jpg)