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 and XYZ).
Thank you for your interest, but this map was already georeferenced and reviewed by other people.
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.
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.
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.
Use the SHIFT key to toggle between the scan and the modern map.
If you see a place on an incorrect position, click on it and choose where it should appear. The map overlay is immediately recalculated.
Get coordinates and accuracy for individual points in selected transformation and map projection. It helps you to identify wrongly placed points
Drag the circle nodes around the area to create a cutline.
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.