I want to plot a nice OpenStreetMap of Europe and any ugly "longlat" or Mercator is out of the question. I've read "Web Mapping Illustated" and successfully installed the "proj" program. In that book, the turning point is when the map of Canada is turned into the LCC projection (EPSG:42304) on pp. 188-189.
In my mind, a nice map of Europe looks like this one that I scanned from an out-of-copyright 1925 encyclopedia, http://commons.wikimedia.org/wiki/Image:Pieni_1_0471.jpg What projection is that? What arguments should I give to "proj" to reproduce this projection? As you can see, lon_0=20 in this case, in order to cover all of Europe from Portugal to the Ural. Also, all of the Mediterranean is covered, down to the Gulf of Sirte (32 N, 18 E) and even a corner of the Persian Gulf. The map center is near Warsaw (52 N). I reckon lat_1 and lat_2 are the latitudes where the projection cone intersects the Earth and that lat_2 defaults to the value of lat_1, making it a tangent case. But how should I pick lat_1 and lat_2 given the coverage area of my map? Should I simply split the latitudes in thirds, so that my span from 30 N to 75 N (along the center longitude) gives lat_1=45 and lat_2=60 (i.e. Belgrade and Stockholm)? My source data from OpenStreetMap.org is in WGS84. How is AEA (Albers Equal Area) different from LCC? The answers to these questions were not obvious to me from reading the proj man page. My best guess is: proj=lcc ellps=WGS84 lon_0=20 lat_0=0 lat_1=45 lat_2=60 -- Lars Aronsson ([EMAIL PROTECTED]) Aronsson Datateknik - http://aronsson.se _______________________________________________ Geowanking mailing list [email protected] http://lists.burri.to/mailman/listinfo/geowanking
