I have an quite big CSv File I want to have in Google Maps or just on a map. These are just coordinates but I have 600.000 of them..
Do you have any Idea how I can do t
GPS Visualizer has an interface by which you can cut and paste a CSV file and convert it to kml:
http://www.gpsvisualizer.com/map_input?form=googleearth
Then use Google Earth. If you don't have Google Earth and want to display it online I found another nifty service that will plot kml files online:
http://display-kml.appspot.com/