On Sat, Mar 28, 2015 at 2:48 PM, Peter Borissow <peter.boris...@yahoo.com>
wrote:
> Got it. Couple more questions:
>
> I'd like to implement the Behrmann and Gall Orthographic projections. They
> are simple Cylindrical Equal Area projections with a predefined standard
> parallel. Do I need to create a new class for each of these projections or
> is there some simple way to create an alias?
>
No, I think you should just create a new provider, see what I did in the
second commit I linked in the previous mail, I believe there
was one or two examples of that.
>
> Similarly, how should I handle direct aliases such as the "Lambert
> Cylindrical Equal Area"? Do I need to create new classes for these as well?
>
> http://www.remotesensing.org/geotiff/proj_list/cylindrical_equal_area.html
>
Likewise, if the math is the same, and you are just initializing it with
different parameter names/default values.
One thing, I'm not sure if these projections are in the EPSG database, but
if they are, make sure to match
the name used there, so that we can CRS.decode(...) them from the EPSG
database.
I think only the Lambert one is recognized in the db:
http://www.epsg-registry.org/export.htm?gml=urn:ogc:def:method:EPSG::9835
For example, after adding support for it, trying to decode EPSG:3571
should give you back a CRS describing WGS 84 / North Pole LAEA Bering Sea
Cheers
Andrea
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