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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>I asked the following a couple of weeks ago and never got a reply. Frank, can you comment on this please?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>…<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I am trying to remap all “0” value pixels in the source images to the value ”1” in the output image using gdalwarp like so:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas'>warpOptions->padfSrcNoDataReal[bandIndex] = 0;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas'>warpOptions->padfSrcNoDataImag[bandIndex] = NULL;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas'>warpOptions->padfDstNoDataReal[bandIndex] = 1;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas'>warpOptions->padfDstNoDataImag[bandIndex] = NULL;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas'>1. I am setting INIT_DEST=0.<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas'>2. not setting UNIFIED_SRC_NODATA.<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas'>3. the source images have no defined nodata value.<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas'>4. the output image has no defined nodata value.<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>with no luck. My question is: Is gdalwarp supposed to do this? When I look at the pixel value of the output image the black pixels are still “0” and not “1”.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>My input and output are both 8-bit 3 band images. I am using gdal 1.9.2.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Best regards,<o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'>Martin</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p> </o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>