[GRASSLIST:2387] Re: s.proj question

[Malcolm Williamson]

If my memory serves me correctly, the later NRCS release of GRASS included
NAD27<->NAD83 datum conversion ability. Is there a reason that this was never
incorporated into the "standard" GRASS code?
	-Malcolm Williamson
	 Center for Advanced Spatial Technologies
	 University of Arkansas, Fayetteville

"Eric G. Miller" wrote:
> 
> On Tue, Sep 04, 2001 at 10:46:13AM -0400, Kevin Slover wrote:
> > I am using the s.proj command to reproject some site data, and I am
> > curious to the conversion method used.  I am going from nad83 degrees
> > (decimal) format to state plane coordinate.  Is it using something
> > similar to CORPSON available from the National Geodetic Survey, or is an
> > internal program developed by the GRASS programmer??  Thanks...
> 
> GRASS uses the PROJ library from USGS originally...  No Datum
> transformations yet... Any beware that there's a bug in how State Plane
> is handled.  You'll always get State Plane 27 projection info unless you
> rename <grass>/etc/state27 => state27.bak, state83 => state27.  It's
> something of a hardwired bug...
> 
> --
> Eric G. Miller <egm2 at jps.net>