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(1) To obtain the Chinese 1km landuse raster data from http://westdc.westgis.ac.cn/
(2) From the information of the raster data, knowing the projection is ALBERS.
(3) However the projection from the atmospheric model is Lambert, so the projection transformation is needed.
(4) Use Arcgis 10.2 extract the data what we wanted
spatial analysis tool→ extract by attibutes
(5) reprojecting the raster data
data management tools→projection and transformation→project raster
(6) in the window of project raster, defining the Lambert conformal conic projection. Seeing the table
(7) Defining the polygon fishnet
data management tools→feature class→creat fishnet
when the creating fishnet window appeared, the most important thing is difining the fishnet origin coodinate. The formula is like:
left cornel : -( west_east grid cells/2 +0.5)*grid resolution
bottom : -(south_north grid cells/2+0.5)*grid resolution
(8)calculate the raster areas in each grid cell
spatial analysis tools→zonal→Tabute Area
(9) joining the area table to grid cells' attibute table
when joining the attibute table, the area table's ID is same as grid cell's
(10) exporting to Excel
Table of Lambert in Arcgis .VS. in WRF
Lambert in Arcgis Lambert in WRF
standard_parrell_1 truelat1
standard_parrell_2 truelat2
central_meridian stand_lon
latitude of origin ref_lat
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