我获得了netCDF栅格文件,但无法获取任何元数据来获取栅格所基于的坐标系的名称。栅格本身没有嵌入任何坐标系。我以为这只是WGS84,乍一看似乎很像,但是在ArcMap中进行了进一步的研究后,我发现它是一个相当不常见的系统。显示方式如下:
橙色栅格是WGS84中的普通栅格,出于比较目的,我在此处插入了橙色栅格。紫色的是坐标系未知的栅格。您知道这可能是什么吗?
一些更新:这是netCDF栅格:https ://www.dropbox.com/s/nottbl9yt6dwss6/sic_average_nclimate.nc?dl =0 我还能够从图像提供者那里获取一些元数据:
netcdf sic_average_nclimate {
dimensions:
nlon = 361 ;
nlat = 90 ;
nseas = 4 ;
variables:
float SIC_Change(nlat, nlon) ;
SIC_Change:Title = "Gridded Multi-Model Ensemble Mean Annual Mean Change in Ice Concentration 21C-20C" ;
float SIC_Season_Change(nseas, nlat, nlon) ;
SIC_Season_Change:Title = "Gridded Multi-Model Ensemble Mean Seasonal Mean Change in Ice Concentration 21C-20C" ;
float SIC_Change_STD(nlat, nlon) ;
SIC_Change_STD:Title = "Gridded Multi-Model Standard Deviation of the Annual Mean Change in Ice Concentration 21C-20C" ;
float SIC_Season_Change_STD(nseas, nlat, nlon) ;
SIC_Season_Change_STD:Title = "Gridded Multi-Model Standard Deviation of the Seasonal Mean Change in Ice Concentration 21C-20C" ;
float LAT(nlat) ;
LAT:Title = "Latitude" ;
float LON(nlon) ;
LON:Title = "Longitude" ;
// global attributes:
:Title = "Ice Concentration metrics for Model subset as in Figure 1 of NCLIMATE paper" ;
它们显示了边界纬度,但显然没有任何有关坐标系的信息。