Hi all:<div><br></div><div>I'm wondering if there's a good solution to the issues I'm having. I would prefer to use JPEG format for my maps, overall they look better and are smaller. But I have two issues I'm wondering about.
</div><div><br></div><div>1) I can't seem to find a way to turn off anti-aliasing. Is it possible to turn it off with JPEG ? I want the crisper look of aliased lines for the various (MULTI)LINESTRING elements like state/county/country/coastlines, etc.</div>
<div>2) The images are washed out or are lighter in color. Hard to explain, it's as if it's over exposed film.</div><div><br></div><div>If I use GIF output, these problems go away, but other problems are introduced. For instance the image size goes up too much and the quality of the other features goes down.</div>
<div>I have one of the Nasa Blue Earth images as a base rastar layer, then place roads and other features on top of it.</div><div><br></div><div>I can use PNG images, but those are also too large and I still have the antialiasing problem with certain features.</div>
<div><br></div><div>I've considered using a jpeg for the blue marble, then a transparent gif for the overlay, and joining the two.</div><div>I can't seem to get the GIF transparency to work though. (Manually setting the transparency and overlaying the GIF on the JPEG seems to produce a reasonable result.)</div>
<div><br></div><div>Gif declaration:</div><div><div> OUTPUTFORMAT</div><div> NAME "gif"</div><div> DRIVER GD/GIF</div><div> MIMETYPE "image/gif"</div><div> IMAGEMODE PC256</div>
<div> EXTENSION "gif"</div><div> FORMATOPTION "TRANSPARENT=ON"</div><div> END</div><div> IMAGECOLOR 55 55 55</div></div><div><br></div><div>Jpeg declaration:</div><div><div> OUTPUTFORMAT</div>
<div> NAME "jpeg"</div><div> DRIVER AGG/JPEG</div><div> MIMETYPE "image/jpeg"</div><div> IMAGEMODE RGB</div><div> EXTENSION "jpg"</div><div> END</div></div>
<div><br></div><div><br></div><div>Can anyone provide any help?</div><div><br></div><div>Thank you.</div><div><br></div><div><br></div><div><br></div>