[MetaCRS] Re: [Proj] Question related to the new version

[Norm Olsen]

Hello Bob . . . 

> I'm specifically interested in getting a projection for all the counties 
> for each US state, which is in the AutoCAD list.

I'm making a guess here, but I think you are referring to a coordinate system; a coordinate system which is know as US Albers, 48 states.  A coordinate system based on the Albers Equal Area Conic projection and optimized for mapping of the 48 conterminous state of the US.  In CS-MAP speak, this coordinate system is referred to as US48 and has been supported for 20 years or so.

I suggest that this is what you may be interested in as the original USGS 1:2,000,000 DLG files which contained county boundaries were distributed based on this coordinate system.  WHIle most all coordinate system packages support this coordinate system, there are some that don't I suspect as EPSG doesn't caryy it in their parameter database.

As Frank mentioned, the CS-MAP library is now open source and available at http://csmap.osgeo.org/.

Hope this helps,

Norm

-----Original Message-----
From: metacrs-bounces at lists.osgeo.org [mailto:metacrs-bounces at lists.osgeo.org] On Behalf Of Frank Warmerdam
Sent: Tuesday, September 29, 2009 1:27 PM
To: PROJ.4 and general Projections Discussions
Cc: metacrs at lists.osgeo.org
Subject: [MetaCRS] Re: [Proj] Question related to the new version

Bob Basques wrote:
> 
> 
> Related to the new stuff.
> 
> 
> Did the AutoDesk projection LIB ever make it into the PROJ (or some 
> other type of projectin list) as a published product for use?  I 
> remember something about some new form of listing (like EPSG) that was 
> going to be assembled, but . . .
> 
> 
> I'm specifically interested in getting a projection for all the counties 
> for each US state, which is in the AutoCAD list.

Bob,

I believe you are referring to the CS-Map software library.  This has
been released by Autodesk as open source, and it is part of the
MetaCRS project, but it is distinct from PROJ.4.  It can be found at:

   http://csmap.osgeo.org/

It does include a variety of coordinate system dictionaries - some
derived from EPSG, but also from a variety of other sources.  I'm not
really familiar with it, and I don't immediately see one that is a
dictionary of county coordinate systems, but Norm and Hugues on
the metacrs list are the people to answer the question!

There has been a wee bit of discussion of how to more effectively share
coordinate system definitions between CSMap and PROJ.4, but so far there
hasn't been anything concrete done.

Best regards,
-- 
---------------------------------------+--------------------------------------
I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush    | Geospatial Programmer for Rent

_______________________________________________
MetaCRS mailing list
MetaCRS at lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/metacrs