[mapserver-users] How to make uvraster background transparent?

[Stephen Woodbridge]

Ooops, you are correct. The layer was setup as a jpeg in OL. I changed 
it to png and that fixed the issue.

Thanks,
   -Steve W

On 7/13/2016 12:06 PM, thomas bonfort wrote:
> Steve,
>
> The black color is coming from somewhere else, uvraster layers are
> transparent, c.f. change/set the imagecolor in
> msautotest/renderers/uvraster.map to see for yourself.
>
> --
> thomas
>
> On 13 July 2016 at 17:59, Stephen Woodbridge <woodbri at swoodbridge.com> wrote:
>> Hi All,
>>
>> I'm trying to use a CONNECTIONTYPE uvraster, andand it works very well,
>> except I would like the black background to be transparent so I can overlay
>> it on other data. A typical LAYER definition follows.
>>
>> Is there a way to do this?
>>
>> Thanks,
>>   -Steve W
>>
>>     LAYER
>>         NAME "uv1_0"
>>         GROUP "0"
>>         TYPE POINT
>>         STATUS ON
>>         MINSCALEDENOM 1000000
>>         CONNECTIONTYPE uvraster
>>         OFFSITE 0 0 0
>>         TRANSPARENCY 100
>>         DATA "/maps/wms/data/HYCOM/HYCOM-currents.tif"
>>         PROCESSING "BANDS=1,2"
>>         #PROCESSING "NODATA=10000"
>>         PROCESSING "NODATA=1.2676506002282e+30"
>>         PROCESSING "UV_SPACING=15"
>>         PROCESSING "UV_SIZE_SCALE=15.0"     # factor
>>         CLASS
>>             EXPRESSION ([uv_length] > 100)
>>         END
>>         CLASS
>>             EXPRESSION ([uv_length] < 4.5)  # 0.3 * factor
>>             STYLE
>>                 SYMBOL "horizline"
>>                 ANGLE [uv_angle]
>>                 SIZE [uv_length]
>>                 WIDTH 1
>>                 COLOR "#3840F2"
>>             END # style
>>             STYLE
>>                 SYMBOL "arrowhead"
>>                 ANGLE [uv_angle]
>>                 SIZE 4
>>                 COLOR "#3840F2"
>>                 POLAROFFSET [uv_length_2] [uv_angle]
>>             END # style
>>         END # class
>>         # ... more CLASSes
>>     END
>>
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