Christopher,<br><br>That seems to have fully cured the edge problems - both at the dateline, as well as at the South extent. Thanks again for your help.<br><br> I have a suggestion. Would it be possible to take the information in the current <a href="http://tilecache.org/readme.html">http://tilecache.org/readme.html</a> and place it in a Wiki? I believe there are probably enough of us using TileCache, that we could probably contribute documentation to clarify and promote its use.<br>
<br>Regards,<br><br>Roger<br>--<br><br><div class="gmail_quote">On Tue, Nov 18, 2008 at 4:21 PM, Roger André <span dir="ltr"><<a href="mailto:randre@gmail.com">randre@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hi Christopher,<br><br>Thanks for the advice, I'll give that (0,10) a shot.<br><br>Any chance you can send me the link to, or the full-text of the conversation between Frank and Klokan?<br><br>Roger<br><font color="#888888">--</font><div>
<div></div><div class="Wj3C7c"><br><br><div class="gmail_quote">
On Tue, Nov 18, 2008 at 4:17 PM, Christopher Schmidt <span dir="ltr"><<a href="mailto:crschmidt@metacarta.com" target="_blank">crschmidt@metacarta.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div>On Tue, Nov 18, 2008 at 04:07:19PM -0800, Roger André wrote:<br>
> It's been pointed out that I didn't include a great deal of information<br>
> about my setup. I doubt it will matter much, but here goes:<br>
><br>
> I am using TileCache to read a large (14400x7200) raster with global<br>
> extents. The raster projection is in lat/lon WGS84. TileCache is set to<br>
> read this data via a MapServerLayer layer type, with settings that match the<br>
> example in the out-of-the-box tilecache.cfg (metaTile=true, metaSize=5,5,<br>
> metaBuffer=10).<br>
<br>
</div>set metaBuffer:0,10 and you may see your edge defects disappear to some<br>
extent.<br>
<br>
Probably something like this is the problem:<br>
<br>
11:55 < FrankW> The problem is that GDAL transforms the destination area<br>
back to the source coordinate system by sampling a grid of points over<br>
the region.<br>
11:55 < FrankW> But points right on the international date line might<br>
transform two different ways.<br>
11:55 < FrankW> so the region selector is missing the last swath of<br>
data.<br>
<br>
<br>
In GDAL-land, you can use:<br>
<br>
11:42 < FrankW> klokan: Try adding "-wo SOURCE_EXTRA=120" to your<br>
gdalwarp commandline without the quotes<br>
<br>
<br>
But I don't know how to use that through MapServer.<br>
<div><br>
> I am using the following package versions in my stack, and they have all<br>
> been built from source:<br>
><br>
> gdal-1.5.2<br>
> mapserver-5.2.0<br>
> proj-4.6.1<br>
> proj-datumgrid-1.4<br>
> tilecache-2.04<br>
> --<br>
><br>
><br>
><br>
> On Tue, Nov 18, 2008 at 3:17 PM, Roger André <<a href="mailto:randre@gmail.com" target="_blank">randre@gmail.com</a>> wrote:<br>
><br>
> > Ok, so now that I've gotten meta-tiling with edge buffering to work, I seem<br>
> > to be able to better control the missing pixel rows that were causing<br>
> > horizontal stripes in my Google Map tiles. Only now I have a huge gap at<br>
> > the international date line. I also have a band of missing data at the<br>
> > extreme South edge of my tiles when I am past Zoom Level 5. I can probably<br>
> > live with that, but since my data set is global, I find it interesting that<br>
> > it's getting cut off, and only on the South side.<br>
> ><br>
> > Anyone seen this before?<br>
> > --<br>
> ><br>
<br>
</div>> _______________________________________________<br>
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<font color="#888888"><br>
<br>
--<br>
Christopher Schmidt<br>
MetaCarta<br>
</font></blockquote></div><br>
</div></div></blockquote></div><br>