Details Ticket 1198


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Serial Number 1198
Subject implementation of shereical earth
Area wish
Queue grass
Requestors Charles.Krouse@noaa.gov
Owner pkelly
Status resolved
Last User Contact Tue Jul 4 14:35:54 2006 (2 yr ago)
Current Priority 30
Final Priority 70
Due No date assigned
Last Action Mon Jul 17 17:59:49 2006 (2 yr ago)
Created Mon Jul 22 19:32:41 2002 (6 yr ago)

Transaction History Ticket 1198


Mon, Jul 22 2002 19:32:41    Request created by guest  
Subject: implementation of shereical earth

Platform: GNU/Linux/i386
grass obtained from: Mirror of Trento site
grass binary for platform: Downloaded precompiled Binaries

Please enter wish description here (and your name)
I would like to use Grass for the importing of CoastWatch AVHRR data.  It is
projected in Mercator with a spherical earth having a radius of 6371200.0 meters
with a resolution of 1.47km/pixel at the equator.  After import, I would like
to reporject into Lambert Azimuthal Equal Area (leae).

Charles Krouse

Charles.Krouse@noaa.gov
Thu, Nov 7 2002 19:01:09    Comments added by mneteler  
The experimental CVS code contains "sphere" now. But I
am not shure if it is working. Should be tested...

Markus
Wed, Aug 13 2003 15:26:15    Owner changed to pkelly by mneteler  
Wed, Aug 13 2003 15:27:04    Mail sent by mneteler  
Can we confirm that spherical earth is working now (5.0 CVS HEAD)?
This is also needed for Mars and Venus.

Markus
Wed, Aug 13 2003 15:37:24    Comments added by pkelly  
When we were talking about Mars recently I made a change to 
src/libes/proj/get_proj.c to pass the eccentricity squared instead of 
recriprocal flattening as an ellipsoid parameter to PROJ (since rf would be 
infinite for a sphere). So it should probably work now.  But needs tested. 
And if we knew the standard radius for spherical earth, spherical mars etc. 
we could add them to src/libes/gis/ellipse.table (well I think earth is 
already there but Mars could be added to emphasise that it is possible).
Sun, Dec 12 2004 16:06:10    Mail sent by mneteler  
Can we confirm that spherical earth is working now (5.4/5.7)?

Thanks

 Markus
Tue, Jul 4 2006 14:35:54    Mail sent by guest  
Hi,

I think this works for GRASS 6. Closing report.

Markus
Mon, Jul 17 2006 17:59:49    Status changed to resolved by mneteler  
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