Hi daryl,
thank you for your answer.
I can preprocess the netcdf to change it to direction/magnitude. but I
couldn't get the SYMBOL to work with raster LAYER.
My mapfile looks something like this:
LAYER
...
DATA "NETCDF:\test\test.nc:direction"
TYPE RASTER
PROCESSING "BANDS=1"
PROCESSING "SCALE=0,360"
...
CLASS
EXPRESSION ([pixel] > 0.0 )
STYLE
SYMBOL "arrow"
ANGLE [pixel]
COLOR 0 0 0
END
END
...
but I just get an black map of my raster. Are symbols supported with
rasters?
[EMAIL PROTECTED] wrote:
On Wed, 24 Sep 2008, Ron Goldman wrote:
I have a netcdf containing the Lon/Lat components of winds and
currents and I want to display them on an arrow map. Is there a way
to do this? so far I only found a way to do this for point
shapefiles, but my data is composed of two rasters. any suggestions
would be greatly appreciated.
Hi Ron,
Do you need to do this within the Mapserver CGI environment or can you
use Mapscript to generate your images? If you can use mapscript, you
can write your own logic to figure out the rotation values based on
the components.
If you are stuck without mapscript, you could use another tool to add
a rotation variable to your NetCDF file and then directly use it in
your mapfile for symbol rotation (I believe this is now supported in
5.2.0)...
Others on this list may have more clever ideas.
daryl
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