[ncl-talk] Questions About Shapefiles

[Zhu CE]

Dear NCL users,


Recently I am trying to use the shapefiles downloaded from DIVA-GIS (http://www.diva-gis.org/gdata). Those files can provide finer boundary information (like Nanjing City in Jiangsu Province, China) than Earth..3 database provides.
I have known how to plot shapefiles and shapefiles_4.ncl also shows an example of masking out all areas inside or outside this outline.But the masking results are coarser and slower than masking doing by NCL itself.
I am writing to ask are there some alternative methods to mask area out finer and quicker with shapefiles or to add shapefile information into map database like Earth..3? Could you help me? Thanks a lot.
Attached is the masked plot using shapefiles_4.ncl script.


Best wishes,


Ce Zhu


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