[Proj] WGS84 --> Albers coordinate transformation question

[Jim Mace]

My latitude is 45, longitude -117.

I am also using a C# wrapper for GDAL/OSR that uses the proj.4 library to
convert coordinates.  It is only thing I could get to work in an ASP.NET
application.

Jim Mace
Application Programmer

Benchmark Research & Safety Inc.
201 W. Sprague Ave
Suite 222
Spokane, Washington 99201


-----Original Message-----
From: proj-bounces at lists.maptools.org
[mailto:proj-bounces at lists.maptools.org] On Behalf Of Ed McNierney
Sent: Tuesday, April 10, 2007 12:48 PM
To: PROJ.4 and general Projections Discussions jmace at benchmarkrs.com,
Subject: Re: [Proj] WGS84 --> Albers coordinate transformation question

Jim -

I get:

cs2cs +proj=latlong +datum=WGS84 +no_defs +to +proj=aea +lat_1=29.5
+lat_2=45.5 +lat_0=23 +lon_0=-96 +x_0=0.0 +y_0=0.0 +ellps=GRS80 +units=m
+datum=NAD83 +no_defs
-117 45
-1640181.94     2627681.67 0.00


Are you entering -117 45 as your input, or 45 -117?

    - Ed

-- 
Ed McNierney
President and Chief Mapmaker
Maps a la carte, Inc. / TopoZone.com
73 Princeton Street, Suite 305
North Chelmsford, MA  01863
Phone: (978) 251-4242
Fax: (978) 251-1396
ed at topozone.com

> From: Jim Mace <jmace at benchmarkrs.com>
> Organization: Benchmark Research & Safety Inc.
> Reply-To: <jmace at benchmarkrs.com>, "PROJ.4 and general Projections
> Discussions" <proj at lists.maptools.org>
> Date: Tue, 10 Apr 2007 12:10:28 -0700
> To: <proj at lists.maptools.org>
> Subject: [Proj] WGS84 --> Albers coordinate transformation question
> 
> I'm trying to convert decimal degrees, in WGS84, to Albers.  My source
proj
> string is (+proj=latlong +datum=WGS84 +no_defs), and my destination proj
> string is (+proj=aea +lat_1=29.5 +lat_2=45.5 +lat_0=23 +lon_0=-96 +x_0=0.0
> +y_0=0.0 +ellps=GRS80 units=m +datum=NAD83 +no_defs).  When I use the
> latitude and longitude 45 and-117, respectively, I get the following
> 0.785398163397449/-2.04203522483337.  Any ideas?
> 
> Jim Mace
> Application Programmer
> 
> Benchmark Research & Safety Inc.
> 201 W. Sprague Ave
> Suite 222
> Spokane, Washington 99201
> 
> 
> 
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