[NARCCAP-discuss] coordinate systems for NARCCAP model grids

[Shuang-Ye Wu]

Thanks a lot, Hailey!

Shuang-Ye

On Tue, Jun 21, 2011 at 2:11 PM, Hailey Eckstrand <haileye at uvic.ca> wrote:

> Hi Shuang-Ye,
> I use the PROJ.4 - Cartographic Projections Library to define each RCM
> projection.
>
> http://trac.osgeo.org/proj/
>
> Here are my projection definitions:
>
> crcm = "+proj=stere +lat_0=90.0 +lat_ts=60.0 +lon_0=263.0 +y_0=7475000.0
> +x_0=3475000.0 +a=6371000 +b=6371000 +units=m"
> ecp2 = "+proj=stere +lat_0=90.0 +y_0=8400000 +x_0=4700000 +lat_ts=60.0
> +lon_0=263.0 +a=6371205 +b=6371205 +units=m"
> mm5i = "+proj=lcc +lat_0=47.5 +lat_1=30.0 +lat_2=60.0 +lon_0=-97.0
> +y_0=3200000.0 +x_0=3825000.0 +a=6370000 +b=6370000 +units=m"
> rcm3 = "+proj=somerc +lat_0=47.5 +y_0=3150000.0 +x_0=3900000.0 +lon_0=-97.0
> +a=6371229.0 +b=6371229.0 +units=m"
> wrfg = "+proj=lcc +lat_0=47.5 +lat_1=30.0 +y_0=2700000.0 +lat_2=60.0
> +x_0=3325000.0 +lon_0=-97 +a=6370000 +b=6370000 +units=m"
>
> I also have the definitions (except hrm3) in ESRI's .prj format if that is
> helpful.
> Please note however that this library isn't very equipped to deal with
> Hadley's rotated pole projection (hrm3).
> I have not found a way to define the rotated pole projection in ESRI & have
> layers overlay properly.
>
> However, I have found a workaround to transform other layers (shapefiles)
> into the rotated pole projection within R (for things like spatial subsets).
> If anyone is interested, I can send out my script.
>
> Hailey
>
>
> -----Original Message-----
> From: narccap-discuss-bounces at mailman.ucar.edu [mailto:
> narccap-discuss-bounces at mailman.ucar.edu] On Behalf Of Shuang-Ye Wu
> Sent: Tuesday, June 21, 2011 7:19 AM
> To: Discussion of NARCCAP data - uses and questions
> Subject: [NARCCAP-discuss] coordinate systems for NARCCAP model grids
>
> Hi,
>
> Would you mind providing me with some information on the coordinate systems
> used for xc and yc values for each of the NARCCAP model grids?
>
> Thanks a lot.
>
> Shuang-Ye
>
> --
>
>
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Shuang-Ye Wu, PhD
> Assistant Professor
> Geology Department
> University of Dayton
> 300 College Park
> Dayton, Ohio 45469-2364
> Tel: 937-229-1720
> Fax: 937-229-2889
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>



-- 



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Shuang-Ye Wu, PhD
Assistant Professor
Geology Department
University of Dayton
300 College Park
Dayton, Ohio 45469-2364
Tel: 937-229-1720
Fax: 937-229-2889