| Re: Irregularly Lat Lon Grid: Displaying Land Types [message #40869] |
Mon, 13 September 2004 17:18  |
Mark Hadfield
Messages: 783
Registered: May 1995
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Senior Member |
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Thundurstruck wrote:
> Hello all,
>
> I have vegetation type data (Integer 1-13) on a 12km grid and
> would like to display it on a map. I don't want to contour the data
> but rather just display the grid boxes colored according to the
> vegetation class. I can't use map_image (not a regular lat/lon grid).
> Any ideas or suggestions will be greatly appreciated.
Certainly, but first you're going to have to explain to us what sort of
grid you *do* have. What shape are the boxes? What is the geometry of
the grid?
--
Mark Hadfield "Ka puwaha te tai nei, Hoea tatou"
m.hadfield@niwa.co.nz
National Institute for Water and Atmospheric Research (NIWA)
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| Re: Irregularly Lat Lon Grid: Displaying Land Types [message #40969 is a reply to message #40869] |
Mon, 20 September 2004 11:45  |
alonge
Messages: 4
Registered: September 2004
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Junior Member |
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> Thundurstruck wrote:
>> Hello all,
>>
>> I have vegetation type data (Integer 1-13) on a 12km grid and
>> would like to display it on a map. I don't want to contour the data
>> but rather just display the grid boxes colored according to the
>> vegetation class. I can't use map_image (not a regular lat/lon grid).
>> Any ideas or suggestions will be greatly appreciated.
> Certainly, but first you're going to have to explain to us what sort of
> grid you *do* have. What shape are the boxes? What is the geometry of
> the grid?
The grid is output from NCEP's operational ETA forecast model on the
Arakawa (rotated lat-lon) E-grid. The grid is staggered row by row,
rotating wind and mass points, giving the the data a diamond type grid
box.
Here is a short example
H V H V H V
V H V H V H
H V H V H V
The grid is 606 in E-W or x direction and 1067 in the N-S or y
direction.
The SW corner is located at 3.441S , 148.799 W
and the NW corner is located at 50.000N , 111.000 W
Thanks,
Chuck
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