Transformation is a process when the image is moved to
a new position which is based on adding of control points. The map
has to be sometimes deformed. Here you can set a default value for
transformation. This is used as a default transformation for
displaying of a map, 3D globe and Web map services (WMTS, TileJSON
The cutlines are not allowed to overlap!
Fix this by dragging the cutline nodes or removing them using the delete key.
Please, place a few more points.
There are already too many points on this map.
Please improve the existing points rather than adding more.
There are some unsaved changes, please wait for the synchronization to finish.
Welcome to Georeferencer
Here you assign a location to a scan and overlay it on top of a modern map.
Help us to give these maps a new life! It is a simple process.
Find the same place - side by side
Your target is to find the same place on the modern map and on the scan.
Click on both of them.
More points improve the precision. Quality matters.
After few points try Overlay & Clip
Use the Overlay to preview and adjust the position of the map overlay interactively.
The Clip mode can remove a border from the map.
Additional functions of the tool are explained under help.
Type a place name and hit ENTER or choose from the suggested alternatives.
Switch to one of the offered basemaps or add your own map service. We are supporting WMTS or TileJSON.
Synchronize drag and zoom on both maps.
Change rotation of the old map.
Switching between the scan and the modern map.
Use the SHIFT key to toggle between the scan and the modern map.
Editing in Overlay mode
If you see a place on an incorrect position, click on it and choose where it should appear.
The map overlay is immediately recalculated.
Accuracy & coordinates
Get coordinates and accuracy for individual points in selected transformation and map projection.
It helps you to identify wrongly placed points
Clip the map borders
Drag the circle nodes around the area to create a cutline.
Detail makes a difference
Click on the point once to get in the detailed view for higher accuracy positioning.
Press DELETE key to remove the point.
More maps on the scan? Click on the "Secondary map" button to separate it from others.