Newsgroups: info.grass.user
Path: zorro.cecer.army.mil!shapiro
From: shapiro@zorro.cecer.army.mil (Michael Shapiro)
Subject: Re: v.transform
Message-ID: <C3I44L.8rJ@news.cecer.army.mil>
Sender: news@news.cecer.army.mil (Net.Noise owner)
Organization: US Army Corps of Engineers Construction Engineering Research Labs
References: <9302192112.AA27794@hardy.u.washington.edu>
Date: Sun, 7 Mar 1993 04:21:57 GMT
Lines: 38
In <9302192112.AA27794@hardy.u.washington.edu> bac@u.washington.edu (Brian Connelly) writes:
Look for v.proj in 4.1. GRASS 4.1 adopted the projection library
from mapgen (which I beleive is based on GCTP). With this you should
be able to project vector data to/from most projections, including
the state plane systems. This capability doesn't (yet) support
NAD27 -> NAD83 datum shift, however. v.transform will only approximate
the transformation. v.proj should do a much better job.
(I would like to say would, but until the beta test is finished and perhaps
well into 4.1 I
Hello,
I need to transform some data in ascii vector format and
state plane coordinates into UTM coordinates. I noticed
that v.transform can do this if you provide it with a
file containing 4-10 transformation points. Can anyone
suggest a way to determine these transformation points?
Also, the man pages for v.transform says that it does not
work very well with states using the Lambert Conformal
Conic Projection. Does it work well at all and how do I
determine how well it is working?
Thank you,
Brian
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Brian Connelly
College of Forest Resources phone: (206) 543-5506
University of Washington AR-10 FAX: (206) 685-3091
Seattle, Washington 98195 e-mail: bac@hardy.u.washington.edu
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
--
Michael Shapiro U.S. Army CERL
Environmental Division