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<p class=MsoNormal><font size=2 color=navy face="Trebuchet MS"><span
style='font-size:10.0pt;font-family:"Trebuchet MS";color:navy'>Not easily that
I have found. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Trebuchet MS"><span
style='font-size:10.0pt;font-family:"Trebuchet MS";color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Trebuchet MS"><span
style='font-size:10.0pt;font-family:"Trebuchet MS";color:navy'>One method that I
have used was to calculate the overlap from adjacent images necessary to cover
the black border resulting from projection, generate an image from the source
tile and the eight adjacent tiles (not the whole of the adjacent tiles, just
the requisite margin), project, the clip back to target projected extent.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Trebuchet MS"><span
style='font-size:10.0pt;font-family:"Trebuchet MS";color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Trebuchet MS"><span
style='font-size:10.0pt;font-family:"Trebuchet MS";color:navy'>However, if you
can afford the disk space, creating the one large mosaic, projecting, and then
clipping out tiles is way easier.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Trebuchet MS"><span
style='font-size:10.0pt;font-family:"Trebuchet MS";color:navy'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=2 color=navy face="Trebuchet MS"><span
style='font-size:10.0pt;font-family:"Trebuchet MS";color:navy'>David Lowther</span></font><o:p></o:p></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> UMN MapServer
Users List [mailto:MAPSERVER-USERS@LISTS.UMN.EDU] <b><span style='font-weight:
bold'>On Behalf Of </span></b>John Mitchell<br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, April 05, 2007
10:41 AM<br>
<b><span style='font-weight:bold'>To:</span></b> MAPSERVER-USERS@LISTS.UMN.EDU<br>
<b><span style='font-weight:bold'>Subject:</span></b> [UMN_MAPSERVER-USERS]
gdalwarp with change in projection for tiles then adjacent tiles overlap
slightly with a black border at edge.</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Hi,<br>
<br>
I have found that running gdalwarp with a change in projection individually for
each tile and splitting them up via gdal_translate that the adjacent tiles
overlap slightly with a black border at edge. If I instead run gdalwarp
against all the tiles to create a big mosaic with a change in projection and
then split(gdal_translate) them up that I don't have this overlap. <br>
<br>
Is their a way to individually run gdalwarp with a change in projection against
each tile without getting this overlap?<br>
<br>
Thanks,<br clear=all>
<br>
-- <br>
John J. Mitchell <o:p></o:p></span></font></p>
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