No subject

[Net.Noise owner]

Newsgroups: info.grass.user
Path: zorro.cecer.army.mil!shapiro
From: shapiro at zorro.cecer.army.mil (Michael Shapiro)
Subject: Re: Lambert Azimuthal Equal Area
Message-ID: <C4wD51.40H at news.cecer.army.mil>
Sender: news at news.cecer.army.mil (Net.Noise owner)
Organization: US Army Corps of Engineers Construction Engineering Research Labs
References: <9303312200.AA07457 at cast.uark.edu>
Date: Sat, 3 Apr 1993 07:36:36 GMT
Lines: 41

In <9303312200.AA07457 at cast.uark.edu> anne at cast.uark.edu (Anne Gisiger) writes:


>Hello

>I have vector layers in the Lambert Azimuthal Equal Area projection that I
>need to use in GRASS. 
> 
>Does anyone know if GRASS can deal with this projection i.e.:
>	- is it possible to create a Lambert Azimuthal location, and
>	- could layers in any of GRASS predefined projections be 
>          transformed into Lambert Azimuthal using v.proj?
>	
>I was told that GRASS used to allow the creation of user-defined ellipsoids?
>If it is still possible it might be a solution to my problem. Do you have
>any ideas about how it is done? 

If all goes well (and this may be a bug IF) you will be able to
use v.proj to convert from one projection to another. You do it
by creating location that have projection info for the location
(ie all maps are ASSUMED to be in the projection of the location
and this is a user reponsibility). The create another location
for the resulting projection and use v.proj to "copy" vector
file from onme location to another projecting as they are copied
using v.proj. g.setproj is used to configure a location for a
given projection.




>-------------------------------------------------------------------------------
>Anne Gisiger, Research Assistant                 FAX: (501) 575-3846
>CAST, Center for Advanced Spatial Technologies   TEL: (501) 575-6159     
>12 Ozark Hall, University of Arkansas         
>Fayetteville AR 72701                             anne at cast.uark.edu 
>-------------------------------------------------------------------------------
-- 
Michael Shapiro               shapiro at zorro.cecer.army.mil
U.S. Army CERL                (217) 373-7277
P.O. Box 9005 
Champaign, Ill. 61826-9005