Symbols Look Poor in JPEG Output
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When I render my symbols to an 8bit output (PNG, GIF) they look fine, but in 24bit jpeg output they look very blocky and gross.
In order to render some classes of symbols properly in 24bit output, such as symbols from true type fonts, it is necessary to force rendering to occur in RGBA. This can be accomplished by including the "TRANSPARENCY ALPHA" line in the layer definition. Don't use this unnecessarily as there is a performance penalty.
This problem also affects PNG24 output or any RGB output format. 8bit (PC256) or RGBA output types are already ok.
This FAQ applies to: MapServer 4.6, MapServer 4.8
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FOSS4G2008
