[gradsusr] Plotting shapefile elements

[Jeff Duda]

Consult the GrADS user's page on shapefiles first:
http://cola.gmu.edu/grads/gadoc/shapefiles.html

I recommend writing each set of product types to a separate shapefile using
'gxout shp' and 'shpattr' to control which elements are draw to which file.
Then plot all elements of each shapefile separately using traditional means.

Jeff Duda

On Mon, Mar 7, 2022 at 4:16 AM Jason M. Warren <jason at solargrafix.com>
wrote:

> Hello,
>
> I am trying to plot a shapefile which contains multiple elements.  I
> queried the shp and dbf files as follows:
>
>
> ga-> q shp current_warnings
> Shapefile Type=Polygon #Shapes=4 XBounds=-88.9:-86.86 YBounds=29.38:37.16
> 0:  Polygon  parts=1  vertices=5  XBounds=-88.05:-86.86
> YBounds=29.38:30.01  ZBounds=0:0  MBounds=0:0
> 1:  Polygon  parts=1  vertices=19  XBounds=-88.49:-87.05
> YBounds=36.5:37.16  ZBounds=0:0  MBounds=0:0
> 2:  Polygon  parts=1  vertices=8  XBounds=-88.9:-88.36
> YBounds=31.43:31.63  ZBounds=0:0  MBounds=0:0
> 3:  Polygon  parts=1  vertices=11  XBounds=-88.35:-88.01
> YBounds=32.05:32.25  ZBounds=0:0  MBounds=0:0
>
>
> ga-> q dbf current_warnings
> RECORD#,PHENOM,SIG,WARNID,WFO,EVENT,ISSUANCE,EXPIRATION,URL,MSG_TYPE,PROD_TYPE
>
>
> 0,MA,W,O.NEW.KMOB.MA.W.0008.0109022
>          2070225.670784,KMOB,0008,2022-01-09 19:02:25,2022-01-09
> 21:00:00,
> http://forecast.weather.gov/product.php?site=MOB&issuedby=MOB&product=SMW,SMW,Marine
> Warning
> 1,FF,W,O.CON.KPAH.FF.W.0005.0109022
>          2055627.670773,KPAH,0005,2022-01-09 17:56:27,2022-01-09
> 21:15:00,
> http://forecast.weather.gov/product.php?site=PAH&issuedby=PAH&product=FFS,FFS,Flash
> Flood Warning
> 2,SV,W,O.NEW.KMOB.SV.W.0003.0109022
>          2072922.670791,KMOB,0003,2022-01-09 19:29:22,2022-01-09
> 20:15:00,
> http://forecast.weather.gov/product.php?site=MOB&issuedby=MOB&product=SVR,SVR,Severe
> Thunderstorm Warning
> 3,SV,W,O.CON.KMOB.SV.W.0001.0109022
>          2072321.670789,KMOB,0001,2022-01-09 19:23:21,2022-01-09
> 19:45:00,
> http://forecast.weather.gov/product.php?site=MOB&issuedby=MOB&product=SVS,SVS,Severe
> Thunderstorm Warning
>
>
> However, I can not figure out how to plot this with different colors for
> each element (SVR, SMW, etc...).  I have tried the following code which
> plots everything in the shapefile...
>
>
> 'set rgb 1  255 0 0 255'
> 'set shpopts -1'
> 'set line 1 1 1'
> 'draw shp current_warnings'
>
>
> But I need to know how to draw each kind of element separately (SVR,
> SMW, etc...).
>
> Thanks,
>
> Jason Warren
>
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-- 
Jeff Duda, Research Scientist
University of Colorado Boulder
Cooperative Institute for Research in Environmental Sciences
NOAA/OAR/ESRL/Global Systems Laboratory
Boulder, CO
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