[Geomoose-users] Output format AGG?

[Sacha Black]

Thanks Jim and Bob - both very helpful

SB

On Tue, Jan 13, 2009 at 7:13 AM, Jim Klassen
<Jim.Klassen at ci.stpaul.mn.us> wrote:

> There is a catch here if your users use IE 6. AGG need full 24-bit color to handle the sub-pixel rendering that allows it to look better than GD. GeoMOOSE requires transparent images (except for backgrounds which are at the bottom of the stack anyway) so you can see through the layers to see the layers underneath the current layer. The problem is IE 6 (and earlier) does not display 24-bit transparent PNGs correctly. IE 7 and just about any other browser should work fine.
>
> The AGG_Q format below is a compromise to retain 256 colors with AGG, however if you have more than a few colors in the map, you will loose some of the advantage of AGG because it won't have enough colors (of the 256) left to do the dithering.
>
>>>> "Bob Basques" <Bob.Basques at ci.stpaul.mn.us> 01/12/09 5:00 PM >>>

> Sacha,
>
> You need to make sure your MapServer install has
> AGG compiled in.
>
> Here is a MapFile fragment for AGG that I have that works:
>
> MAP
>  NAME 'label_shields'
>  SIZE 800 650
>  STATUS ON
>  EXTENT 332000 -18000 678000 328000
>  UNITS FEET
>  FONTSET ./interstate.fonts
>  SYMBOLSET ./interstate.symbols
>  TRANSPARENT TRUE
>  #IMAGECOLOR 239 235 231 #GOOGLE BG COLOR
>
>  #IMAGETYPE PNG  ## This uses the MapServer GD image builder
>  IMAGETYPE AGGA  ## This uses the AGG image builder if compiled into MapServer.  It's defined below.
>
>        LEGEND
>                STATUS ON
>                KEYSPACING 5 10
>                KEYSIZE 20 12
>                IMAGECOLOR 255 255 255
>                LABEL
>                  TYPE TRUETYPE
>                  FONT bluehigh
>                  COLOR 0 0 0
>                  OUTLINECOLOR 254 254 254
>                  SIZE 12
>                END
>        END
>
>  OUTPUTFORMAT
>    NAME 'AGGA'
>    DRIVER AGG/PNG
>    IMAGEMODE RGBA
>    #FORMATOPTION "TRANSPARENT=ON"
>    #TRANSPARENT ON
>  END
>
>  OUTPUTFORMAT
>    NAME 'AGG_Q'
>    DRIVER AGG/PNG
>    IMAGEMODE RGBA
>    FORMATOPTION "QUANTIZE_FORCE=ON"
>    FORMATOPTION "QUANTIZE_DITHER=OFF"
>    FORMATOPTION "QUANTIZE_COLORS=255"
>    TRANSPARENT ON
>  END
>
> . . . . .
>
>
>
>>>> "Sacha Black" <sacha.black at gmail.com> 01/12/09 4:46 PM >>>
> hi all,
>
> is it possible to get GeoMoose to request it's images from Mapserver
> with AGG rendering? I tried putting this in my map files:
>
>  OUTPUTFORMAT
>   DRIVER AGG/PNG
>   IMAGEMODE RGBA
>  END
>
> but it didn't seem to make a difference... is there someplace to set
> this besides the map file?
>
> sacha
>
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