How to georeference a map with QGIS

This tutorial is for you if you have a map you obtained from some website or some book, you need to produce a .tiff file which is a localised version of your a mapping. E.g. to display it in a mapping system such as leaflet but you do not know how to do it. You mya have read notes about projection systems, but the calculous got complicated and you may not even know what projection system your map is using. QGIS can help you to geo reference a map even without knowing the projection system. Geo-reference the image Once you have installed QGIS : Open the GeoReferencer tool Load your image Click on add a point Find a point of your map from which you can deduce the coordinate, e.g. a building, a place, a confluence of 2 rivers, a specific point on a coast. You can find its coordinates on OpenStreetMap. Fill in the coordinates (X = longitude, Y = latitude). Find another point and repeat step 4 at least once, the more location you fill, the more precise the georeferencing. Click on Transform