Fwd: [GRASS-user] polyconic projection issues

[pmarc]

Sorry, I sent pvt, should be to list.

---------- Forwarded message ----------
From: pmarc <paulomarcondes at gmail.com>
Date: 12/09/2006 16:29
Subject: Re: [GRASS-user] polyconic projection issues
To: Carlos Guâno Grohmann <carlos.grohmann at gmail.com>


2006/9/12, Carlos Guâno Grohmann <carlos.grohmann at gmail.com>:
> hello, I am trying to create a location for South America data based
> on a polyconic projection. I tried to use EPSG code 29101. The created
> location has default boundaries and resolution like this:

I don't recall right now... is ESPG:29101 Brazilian Polyconic?
If so, there is a mistake in EPSG's definition - the definition states
a false northing that shouldn't be there. Just copy the definition
without the false northing and it should reproject correctly.

It was FrankW himself that has helped me with this issue.

> Can  I work with degrees in this projection? I want to reproject some
> SRTM_30PLUS data from a latlong location. Thanks

Again, if you are talking about Brazilian Polyconic, then no, you
can't work in degrees, but you must work in meters.
--
Paulo Marcondes = PU1/PU2PIX
-22.915 -42.229 = GG87vc (http://www.amsat.org/cgi-bin/gridconv)
Debian GNU/Linux = http://rj.debianbrasil.org = http://www.debian.org


-- 
Paulo Marcondes = PU1/PU2PIX
-22.915 -42.229 = GG87vc (http://www.amsat.org/cgi-bin/gridconv)
Debian GNU/Linux = http://rj.debianbrasil.org = http://www.debian.org