[Proj] Re: Mapping Africa in an equal area projection
strebe at aol.com
Wed Dec 10 04:17:25 EST 2008
At the scales you are working with, there is no point in worrying about ellipsoids. Spherical development is fine. You should use Albers equal area conic for North America and Eurasia, choosing standard parallels inset about 1/6th from the continental north/south extremes. Lambert azimuthal equal-area will work well with South America, Australia, and Antarctica each separately if you use the oblique case, centering it in the center of the continent.
— daan Strebe
On Dec 10, 2008, at 12:49:52 AM, Corrado <ct529 at york.ac.uk> wrote:
yes, 20 km x 20 km would be the higher resolution, but I do not think we have
enough data to work at that resolution. Our data have all different
resolutions, we will need to aggregate them ....
Yes, the map is supposed to fit on the journal pages .... let's say maximum
PS: Is Lambert a good choice also for other continents? For another project I
have to choose a projection / ellipsoid / datum , equal area, that is good
for the whole world, with the smallest data cell at 10km x 10km. I would need
to draw continental maps as well as some country maps. Do you think it is
better to open a new thread altogether?
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