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A teacher using our LAS 6.5 (http://mynasadata.larc.nasa.gov/)server
to produce ArcView gridded output files to be used with GIS software, sent me
this comment: I am fairly convinced that the LAS is doing the
ArcView gridded output slightly wrong: it uses the labels
"xllcorner" and "yllcorner" which should be the X and Y
coordinates of the Lower Left >corner<; but the LAS then gives the values
for the X and Y coordinates of the >center< of the lower left pixel,
rather than the corner. They need to change the values to the
>corner< values (probably -180 and -90) or make the labels
"xllcenter" and "yllcenter" (and then they can use the
center values to match). Response? Penny Oots P. S. I wasn’t able to find the LAS developers
email address so I am sending this to the users list. |