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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Ed,</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>You are absolutely right. I read it using
my GDAL based application and the images look fine. My use for these images is
mostly by my GDAL based application, so in that sense it would be ok. However,
users of this application may do what I did so I’d like to figure out
what’s wrong so the images can be viewed by the windows viewer too. I can
read another color geotiff (not created by me) with that viewer. That file
appears to be a 24 bit TIFF because it has 3 RGB bands of type Byte. </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Brian</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma'>-----Original Message-----<br>
<b><span style='font-weight:bold'>From:</span></b> Ed McNierney
[mailto:ed@topozone.com] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, January 14, 2004
3:54 PM<br>
<b><span style='font-weight:bold'>To:</span></b> gdal-dev@remotesensing.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> RE: [Gdal-dev] Creating a
color geotiff</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color=blue face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:blue'>Brian -</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color=blue face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:blue'>Yes, that's the one I'm
talking about; in a prior life I was involved in creating it! It was
intended as a fax viewer, and does not properly handle many 24-bit TIFFs.
They produce exactly the symptom you describe.</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color=blue face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:blue'>It sounds like your TIFF
is correct - if you have Adobe Photoshop available, that's a much more reliable
color TIFF viewer, and I'll bet the image looks fine in it. However, it's
worth asking what you intend to do with these images, since they need to be
readable by whatever the target reader is.</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font><font size=2
color=blue face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:blue'>- Ed</span></font></p>
<p style='margin-left:.5in'><font size=2 face="Times New Roman"><span
style='font-size:10.0pt'>Ed McNierney<br>
President and Chief Mapmaker<br>
TopoZone.com / Maps a la carte, Inc.<br>
73 Princeton Street, Suite 305<br>
North Chelmsford, MA 01863<br>
ed@topozone.com<br>
(978) 251-4242 </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
<div class=MsoNormal align=center style='margin-left:.5in;text-align:center'><font
size=3 face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center>
</span></font></div>
<p class=MsoNormal style='margin-right:0in;margin-bottom:12.0pt;margin-left:
.5in'><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'> Brian Marchand
[mailto:bmarchand@ara.com] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, January 14, 2004
3:45 PM<br>
<b><span style='font-weight:bold'>To:</span></b> gdal-dev@remotesensing.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> RE: [Gdal-dev] Creating a
color geotiff</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy'>Ed,</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy'>I was using a windows
viewer by Kodak. With this viewer I was able to view other color geotiff files successfully.
The image appeared to repeat itself (in black and white) with stripes of black
interleaved.</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy'>When I use the
“create” function does the type need to match the type that I use
for the RasterIO function for a band? In this case both are set to GDT_Byte. </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy'>For instance I create the
data set with;</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy'>GDALDataset* poDstDS =
poDriver->Create(destFile, sourceGrid.GetCols(), sourceGrid.GetRows(), 3,
GDT_Byte, NULL);</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy'>And write bands with</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy'>poBandR->RasterIO(
GF_Write, 0, row, nXSize, 1, scanline, nXSize, 1, GDT_Byte, 0, 0 );</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy'>where scanline is a char
buffer of size nXSize. Or should I be using something like GDT_Int32 for the
data set type?</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy'>Brian</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal style='margin-left:1.0in'><font size=2 face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma'>-----Original Message-----<br>
<b><span style='font-weight:bold'>From:</span></b> Ed McNierney
[mailto:ed@topozone.com] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, January 14, 2004
3:21 PM<br>
<b><span style='font-weight:bold'>To:</span></b> gdal-dev@remotesensing.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> RE: [Gdal-dev] Creating a
color geotiff</span></font></p>
<p class=MsoNormal style='margin-left:1.0in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal style='margin-left:1.0in'><font size=2 color=blue
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:blue'>Brian -</span></font></p>
<p class=MsoNormal style='margin-left:1.0in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal style='margin-left:1.0in'><font size=2 color=blue
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:blue'>How did
you conclude it was "garbage"? There are quite a few programs
(such as the Windows "Image and Fax Viewer") that don't read them
correctly, or that fail to read certain data organization/formats.</span></font></p>
<p class=MsoNormal style='margin-left:1.0in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal style='margin-left:1.0in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font><font size=2
color=blue face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:blue'>- Ed</span></font></p>
<p style='margin-left:1.0in'><font size=2 face="Times New Roman"><span
style='font-size:10.0pt'>Ed McNierney<br>
President and Chief Mapmaker<br>
TopoZone.com / Maps a la carte, Inc.<br>
73 Princeton Street, Suite 305<br>
North Chelmsford, MA 01863<br>
ed@topozone.com<br>
(978) 251-4242 </span></font></p>
<p class=MsoNormal style='margin-left:1.0in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
<div style='margin-left:.5in'>
<div class=MsoNormal align=center style='margin-left:.5in;text-align:center'><font
size=3 face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center>
</span></font></div>
</div>
<p class=MsoNormal style='margin-right:0in;margin-bottom:12.0pt;margin-left:
1.0in'><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'> Brian Marchand
[mailto:bmarchand@ara.com] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, January 14, 2004
3:10 PM<br>
<b><span style='font-weight:bold'>To:</span></b> gdal-dev@remotesensing.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> [Gdal-dev] Creating a
color geotiff</span></font></p>
<p class=MsoNormal style='margin-left:1.0in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Hello,</span></font></p>
<p class=MsoNormal style='margin-left:1.0in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal style='margin-left:1.0in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>I’m trying to create geotiff
files for the first time and I was successful in creating a black and white
geotiff. So I moved on to creating a color one. I have a grid of RGB values so
I created a data set with 3 bands of type GDT_Byte. I used RasterIO to
write out a row at a time. The result was garbage. </span></font></p>
<p class=MsoNormal style='margin-left:1.0in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal style='margin-left:1.0in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Is there a specific order to writing
out bands? I first tried writing a row of red band, then a row of the green
band, then the row of the blue band. This didn’t work so I dried writing
all of rows for one band before writing the next. Am I way off on this? How
should I be doing this?</span></font></p>
<p class=MsoNormal style='margin-left:1.0in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal style='margin-left:1.0in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Thanks in advance,</span></font></p>
<p class=MsoNormal style='margin-left:1.0in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal style='margin-left:1.0in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Brian Marchand</span></font></p>
<p class=MsoNormal style='margin-left:1.0in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
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