Geography Reference
In-Depth Information
Figure 11.5: Alaska derived from the world mosiac
see the result of our effort. You can see from the figure that indeed we
cropped out Alaska from the world mosaic.
Let's run gdalinfo on the new file and examine a few of the details. We'll
specify the no-metadata switch to cut down on the amount of output.
$ gdalinfo -nomd alaska_mosaic.tif
Driver: GTiff/GeoTIFF
Size is 1161, 501
Coordinate System is:
GEOGCS["WGS 84",
DATUM["WGS_1984",
SPHEROID["WGS 84",6378137,298.2572235629972,
AUTHORITY["EPSG","7030"]],
AUTHORITY["EPSG","6326"]],
PRIMEM["Greenwich",0],
UNIT["degree",0.0174532925199433],
AUTHORITY["EPSG","4326"]]
Origin = (-180.000000000000000,72.026367187500000)
Pixel Size = (0.043945312500000,-0.043945312500000)
Corner Coordinates:
Upper Left (-180.0000000, 72.0263672) (180d 0'0.00"W, 72d 1'34.92"N)
Lower Left (-180.0000000, 50.0097656) (180d 0'0.00"W, 50d 0'35.16"N)
Upper Right (-128.9794922, 72.0263672) (128d58'46.17"W, 72d 1'34.92"N)
Lower Right (-128.9794922, 50.0097656) (128d58'46.17"W, 50d 0'35.16"N)
Center (-154.4897461, 61.0180664) (154d29'23.09"W, 61d 1'5.04"N)
Band 1 Block=1161x7 Type=Byte, ColorInterp=Red
Band 2 Block=1161x7 Type=Byte, ColorInterp=Green
Band 3 Block=1161x7 Type=Byte, ColorInterp=Blue
Band 4 Block=1161x7 Type=Byte, ColorInterp=Alpha
 
 
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