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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Frank and list,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I have discovered that the NITF reader doesn’t read
image chipping information from an NITF file (the ICHIPB TRE). All it
really does is supply 4 tie points (usually the centers of the corner pixels
but not necessarily) from some original image to the data contained in the
image block. Folks use the ICHIPB info so they can preserve sensor
information and RPCs. Something I’ve run into using the
GDALRPCTransformer is: When I get a pixel and line back from the RPC
calculation, it is in reference to the original image. I have changed my
local source to read an ICHIPB and followed the same paradigm of the RPC
information by putting it in the nitfdataset’s metadata for extraction
later. Let me know if you’d like to add it to the baseline.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Given all this, my question is: How would you go about
translating coordinates between the two image spaces? GenImgProjTransformer?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Thanks,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>William Lyons<o:p></o:p></span></font></p>
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