我有一个带旋转坐标的NetCDF文件。我需要将它转换为正常的纬度/经度坐标(-180到180长,-90到90度)。如何将旋转的NetCDF转换回正常纬度/经度?
library(ncdf4)
nc_open('dat.nf')
对于尺寸,它表明:
[1] " 5 variables (excluding dimension variables):"
[1] " double time_bnds[bnds,time] "
[1] " double lon[rlon,rlat] "
[1] " long_name: longitude"
[1] " units: degrees_east"
[1] " double lat[rlon,rlat] "
[1] " long_name: latitude"
[1] " units: degrees_north"
[1] " char rotated_pole[] "
[1] " grid_mapping_name: rotated_latitude_longitude"
[1] " grid_north_pole_longitude: 83"
[1] " grid_north_pole_latitude: 42.5"
[1] " float tasmax[rlon,rlat,time] "
[1] " long_name: Daily Maximum Near-Surface Air Temperature"
[1] " standard_name: air_temperature"
[1] " units: K"
[1] " cell_methods: time:maximum within days time:mean over days"
[1] " coordinates: lon lat"
[1] " grid_mapping: rotated_pole"
[1] " _FillValue: 1.00000002004088e+20"
[1] " 4 dimensions:"
[1] " rlon Size:310"
[1] " long_name: longitude in rotated pole grid"
[1] " units: degrees"
[1] " axis: X"
[1] " standard_name: grid_longitude"
[1] " rlat Size:260"
[1] " long_name: latitude in rotated pole grid"
[1] " units: degrees"
[1] " axis: Y"
[1] " standard_name: grid_latitude"
[1] " bnds Size:2"
谁能告诉我如何旋转坐标转换回正常的拉/长?谢谢。
-180到180不是“正常的”经度。他们只是代表世界的一种方式。 0到360是另一种方式。 – 2015-07-22 00:48:35
这两种方式都是常用的。转换到其中任何一个都可以。 – user1617676
[gis response](http://gis.stackexchange.com/questions/10808/lon-lat-transformation)会回答你的问题吗? –