[GRASS-dev] Missing projections

Glynn Clements glynn at gclements.plus.com
Wed Dec 20 11:07:02 EST 2006


Morten Hulden wrote:

> >>> The following projections are listed by "proj -lp" but don't have
> >>> entries in proj-parms.table:
> >>>
> >>> 	geos : Geostationary Satellite View
> >>> 	lcca : Lambert Conformal Conic Alternative
> >>> 	sterea : Oblique Stereographic Alternative
> >>> 	vitk1 : Vitkovsky I
> >>>
> >>> Can anyone provide the necessary parameter information, i.e. which
> >>> PROJ parameters they accept, and what (if any) default value should be
> >>> used?
> 
> geos projection needs only longitude and height (but doesn't say no to 
> kfact). Latitude seems to be fixed at 0 degrees. In reality most 
> geostationary satellites seem to deviate a little from 0 degrees. Pity, 
> because then geos can't be used (but nsper projection can). Height is 
> usually about 35700-35800 km.
> 
> http://www.n2yo.com
> 
> GEOS:HEIGH=ask,35800000.0;LON0=ask,20.0

Thanks; added.

-- 
Glynn Clements <glynn at gclements.plus.com>




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