Yes, you can add in the coordinate’s information of the existing locations in
ESdat.
You can add in the coordinate details under Locations > Details
The Latitude and Longitude coordinates for a location should be automatically calculated the using the coordinate system specified for the site, and the x and y values entered.
Otherwise, if the locations have been uploaded before the coordinate system has been set in the Site, you can re-calculate the Lat/Long by clicking the calculator button beside the Coordinate System drop down.
Please see more information from these articles from our support page:
https://help.esdat.net/en/article/locations
Why is the Lat Long Not Populating? - ESdat Knowledge Base