Re: [Opengrads-devel] Shapefile extension: first crack

[Mike F. <mfi...@gm...>]

hi efren,  i took a look a mapserver.  is this what fnmoc is using these
days?  it really isn't gis, i'm partial to google earth.  thanks /r mike

Efren Serra wrote:
> Arlindo,
>
> With the perl interface, can you encode colors in a shapefile?
>
> We shouldn't encode colors in the shapefiles; I was hoping to use these
> shapefiles in conjunction with Mapserver and let the coloring to mapserver
> .map configuration file.  However, we should encode some values about the
> shape in the .dbx file so that we can use mapserver's .map file CLASS value,
> which defines thematic classes for a given layer.  A CLASS has an EXPRESSION
> value
> that we can use to select coloring, etc., based on a value encoded in the
> .dbx file.  For instance, here is simple sample for coloring Tropical
> Cyclone Warnings Wind Radiis/Track:
>
>   LAYER
>     NAME "al062007_019_34ktWndRadii"
>     GROUP "tcw"
>     METADATA
>       "wms_title" "al062007_019_34ktWndRadii"   ##required
>     END
>     TYPE  POLYGON
>     STATUS  OFF
>     DATA  /otsr/shapefiles/2007091100/al062007_019_34ktWndRadii
>
>       LABELITEM "RADIUS_NM"
>
>       CLASS
>         NAME "al062007_019_34ktWndRadii"
>         OUTLINECOLOR 255 0 0
>         LABEL
>         MINFEATURESIZE 50
>         MINDISTANCE 150
>         POSITION CC
>         SIZE TINY
>         COLOR 0 0 0
>       END
>       DEBUG ON
>     END
>
>     DUMP TRUE
>     PROJECTION
>       "init=epsg:4326"   ##recommended
>     END
>   END # Layer al062007_019_34ktWndRadii
>
>   LAYER
>     NAME "ep102007_017_track"
>     GROUP "tcw"
>     METADATA
>       "wms_title" "ep102007_017_track"   ##required
>     END
>     TYPE  LINE
>     STATUS  OFF
>     DATA  /otsr/shapefiles/2007091100/ep102007_017_track
>
>       LABELITEM "STM_NAME"
>
>       CLASS
>         NAME "ep102007_017_track"
>         COLOR 0 0 0
>         LABEL
>           MINFEATURESIZE 50
>           MINDISTANCE 150
>           POSITION CC
>           SIZE TINY
>           COLOR 0 0 0
>         END
>         DEBUG ON
>       END
>
>     DUMP TRUE
>     PROJECTION
>       "init=epsg:4326"   ##recommended
>     END
>   END # Layer ep102007_017_track
>
> - how to draw a line in black, and another in green
>
> Mapserver takes care of the drawing for us via the .map file by using
> OUTLINECOLOR
>
> - how to have a rectangle filled "blue"
>
> Mapserver takes care of the drawing for us via the .map file by using COLOR
>
> - how to define new colors from (red,green,blue) values
>
> COLOR and OUTLINECOLOR take RGB values as shown above.
>
> Do you have access to any GIS software? Is there a free alternative to
> ARC/View? Which one do you recommend? I just want a way to see if the file
> we eventually produce with GrADS can be visualized by standard GIS software.
>
> Lets use Mapserver from UMN: http://mapserver.gis.umn.edu.  Thanks.
>
> Efren
>
>
>
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