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ArcInfo投影求助啦ncols 351 nrows 396 xllcorner ??????? yllcorner ?????? cellsize 20000 NODATA_value -9999 整个北美数据,知道分辨率20km,等角投影。还有这些信息: North American grid: parameter (cenlon = -100., ! longitude of projection center * cenlat = 45., ! latitude of projection center * offx = -190., ! offset from projection center * offy = -140., ! to grid center (->E,->N, km) * earthr = 6.37122e6, ! earth radius (m) * sp1 = 30., ! standard parallel #1 (deg N) * sp2 = 60.) ! standard parallel #2 (deg N)
但资料中的这两个参数xllcorner,yllcorner怎么设啊?SOS! ![]() |
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