weixj2003ld,<br><br>First you have to locate the corner pixels corresponding to the lat/longs you indicated. Go through (<a href="http://www.gdal.org/ogr/osr_tutorial.html">http://www.gdal.org/ogr/osr_tutorial.html</a>) to do that. Use "WGS84" system for lat/longs.<br>
<br>Use GDALRasterIO() (<a href="http://www.gdal.org/gdal_tutorial.html">http://www.gdal.org/gdal_tutorial.html</a>) to retrieve the pixels from the required area.<br><br><div class="gmail_quote">2010/6/2 甘肃。思远 <span dir="ltr"><<a href="mailto:weixj2003ld@163.com">weixj2003ld@163.com</a>></span><br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div>I want to get(download) the satellite photo height data(maybe .img or dem,I think) of the two following areas,who help me?</div>
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<p class="MsoNormal"><font size="3" face="宋体"><span style="font-size: 12pt;" lang="EN-US">1. Latitude : 44.750373989-----44.879927098 </span></font></p></div>
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<p class="MsoNormal"><font size="3" face="宋体"><span style="font-size: 12pt;" lang="EN-US"> Longitude: 86.797943335------86.932148806</span></font></p></div>
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<p class="MsoNormal"><font size="3" face="宋体"><span style="font-size: 12pt;" lang="EN-US"></span></font></p></div>
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<p class="MsoNormal"><font size="3" face="宋体"><span style="font-size: 12pt;" lang="EN-US">2.</span></font></p></div>
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<p class="MsoNormal"><font size="3" face="宋体"><span style="font-size: 12pt;" lang="EN-US">Latitude 41d38'34''N ------41d50'12''N</span></font></p></div>
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<p class="MsoNormal"><font size="3" face="宋体"><span style="font-size: 12pt;" lang="EN-US">Longitude 81d29'35''E------81d37'38''E</span></font></p></div></div>
<div>Thank u in advances. </div><br><br><span title="neteasefooter"></span><hr>
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