Within gdalinfo I noticed that the decimal degrees corner coordinates are rectangular but to the right the degrees minutes seconds corner coordinates are not rectangular.<br><br>Below is a gdalinfo dump:<br><br>Driver: GTiff/GeoTIFF
<br>Size is 10000, 10000<br>Coordinate System is:<br>PROJCS[&quot;NAD83 / UTM zone 15N&quot;,<br>&nbsp;&nbsp;&nbsp; GEOGCS[&quot;NAD83&quot;,<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; DATUM[&quot;North_American_Datum_1983&quot;,<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SPHEROID[&quot;GRS 1980&quot;,6378137,
298.2572221010002,<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; AUTHORITY[&quot;EPSG&quot;,&quot;7019&quot;]],<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; AUTHORITY[&quot;EPSG&quot;,&quot;6269&quot;]],<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PRIMEM[&quot;Greenwich&quot;,0],<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; UNIT[&quot;degree&quot;,
0.0174532925199433],<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; AUTHORITY[&quot;EPSG&quot;,&quot;4269&quot;]],<br>&nbsp;&nbsp;&nbsp; PROJECTION[&quot;Transverse_Mercator&quot;],<br>&nbsp;&nbsp;&nbsp; PARAMETER[&quot;latitude_of_origin&quot;,0],<br>&nbsp;&nbsp;&nbsp; PARAMETER[&quot;central_meridian&quot;,-93],
<br>&nbsp;&nbsp;&nbsp; PARAMETER[&quot;scale_factor&quot;,0.9996],<br>&nbsp;&nbsp;&nbsp; PARAMETER[&quot;false_easting&quot;,500000],<br>&nbsp;&nbsp;&nbsp; PARAMETER[&quot;false_northing&quot;,0],<br>&nbsp;&nbsp;&nbsp; UNIT[&quot;metre&quot;,1,<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; AUTHORITY[&quot;EPSG&quot;,&quot;9001&quot;]],
<br>&nbsp;&nbsp;&nbsp; AUTHORITY[&quot;EPSG&quot;,&quot;26915&quot;]]<br>Origin = (742500.000000000000000,4275000.000000000000000)<br>Pixel Size = (0.150000000000000,-0.150000000000000)<br>Metadata:<br>&nbsp; AREA_OR_POINT=Area<br>&nbsp; TIFFTAG_SOFTWARE=Adobe Photoshop CS Windows
<br>&nbsp; TIFFTAG_DATETIME=2005:12:29 11:49:37<br>&nbsp; TIFFTAG_XRESOLUTION=72<br>&nbsp; TIFFTAG_YRESOLUTION=72<br>&nbsp; TIFFTAG_RESOLUTIONUNIT=2 (pixels/inch)<br>Corner Coordinates:<br>Upper Left&nbsp; (&nbsp; 742500.000, 4275000.000) ( 90d12&#39;
56.63&quot;W, 38d35&#39;25.40&quot;N)<br>Lower Left&nbsp; (&nbsp; 742500.000, 4273500.000) ( 90d12&#39;58.51&quot;W, 38d34&#39;36.79&quot;N)<br>Upper Right (&nbsp; 744000.000, 4275000.000) ( 90d11&#39;54.70&quot;W, 38d35&#39;23.92&quot;N)
<br>Lower Right (&nbsp; 744000.000, 4273500.000) ( 90d11&#39;56.59&quot;W, 38d34&#39;35.31&quot;N)<br>Center&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (&nbsp; 743250.000, 4274250.000) ( 90d12&#39;26.61&quot;W, 38d35&#39;0.36&quot;N)<br>Band 1 Block=10000x5 Type=Byte, ColorInterp=Red
<br>Band 2 Block=10000x5 Type=Byte, ColorInterp=Green<br>Band 3 Block=10000x5 Type=Byte, ColorInterp=Blue<br><br clear="all"><br>-- <br>John J. Mitchell