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
We have now (jan2017) a csv layer import inside Google Maps itself.
Google Maps > "Your Places" > "Open in My Maps"
For generating the KML file from your CSV file (or XLS), you can use MyGeodata online GIS Data Converter. Here is the CSV to KML How-To.
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/
The easiest way to do this is generate a KML file (see http://code.google.com/apis/kml/articles/csvtokml.html for a possible solution). You can then open that up in Google Maps by storing it online and linking to it from Google Maps as described at http://code.google.com/apis/kml/documentation/whatiskml.html
EDIT: http://www.gpsbabel.org/ may let you do it without coding.
none of that needed.... just go to:
http://www.gpsvisualizer.com/
now and load your csv file as-is. extra columns and all. it will slice and dice and use just the log & lat columns and plot it for you on google maps.