Re: Mapping geographic data

On Thu, 2009-06-25 at 14:20 +0200, Jean-Claude Moissinac wrote:
> You have to know the projection used to get the geo coordinate
> (usually WGS84, see http://en.wikipedia.org/wiki/WGS_84) and then, you
> must convert the WGS84 coordinates in your coordinate system.
> The convertion could be complex (you can find some converters on the
> web), but if you have coordinate in a relatively small region (ex size
> of France), a simple interpolation could be accurate enough (take the
> min/max of the region and do an interpolation between the min and the
> max).

Yes, I'm currently searching and was searching for a map, from which I
can "get" the used coordinate system/the projection, but it seems to be
very hard to find one :(

regards,
Johannes