31 August, 2008

Geological mapping and Google Earth

The Lab Lemming was it who started uploading fantasy maps which prompted Hypocente from Hypo-theses to try the same with georectified maps from student undergraduate mappings. Inspired by that I took two excerpts from my mapping in Brittany three years ago and tried to upload it into Google Earth. The method ain't perfect, yet, but it is astonishing how easy it is to correctly align the maps using easy to recognise features like roads and coastlines. The only problem I still have is getting the map to the right size without distorting the map.

The coastline at Pointe de Treboul ou Pointe du Guern on the Presqu'ile de Crozon

Above is what I could make from two old scans that I have. South-West of Raguenez you can see the Rozan Formation in brown and to the South-East the Armorican Sandstone in yellow. The little red spot is the Schist Rouge (actually a conglomerate here) and the black areas represent different schists.

1 comment:

effjot said...

Interesting & nice! A first step towards GoogleGIS ;-)