[ncl-talk] Import shapefile into NCL 6.2

[Dave Allured - NOAA Affiliate]

KMZ is a shape format, but it is different than the official ESRI shapefile
format.  The official format has *.shp* suffix, not *.kmz*, and the
shapefile also has at least two companion files with alternate suffixes.
Please see the introduction at the top of NCL's shapefile page:

    https://www.ncl.ucar.edu/Applications/shapefiles.shtml

KMZ can be handled by NCL with quite a lot of tricky programming.  Your
easiest solution would be to go back to gadm.org or some other source, and
download shapefile format, not KMZ.  I hope this helps.

If anyone else has a KMZ or KML reader function for NCL, please mention
it.  This would be a good addition to NCL.


On Thu, Mar 25, 2021 at 10:49 AM G.Monte--- via ncl-talk <
ncl-talk at mailman.ucar.edu> wrote:

> Dear NCL users,
>
> I would like to import a shapefile into my NCL code, in order to have the
> regional (and possibly provincial) suddivision of Italy.
>
> First, I tried with the KMZ level-2 "gadm36_ITA_2.kmz" available in
> www.gadm.org. Once I imported this file into my code, set lnres=True with
> its options and typed:
>
> id = gsn_add_shapefile_polylines(wks,map,"gadm36_ITA_2.kmz",lnres)
>
> I get this error message:
>
> warning:_NclOpenFile: Can not open file <gadm36_ITA_2.kmz>; file format
> not supported or file is corrupted
> warning:isfilevar: undefined file returning missing value
>
> What does it mean properly? It's the first time I have ever tried this, so
> I could get wrong easily.
>
> Thanks in advance,
> Giulio Monte
>
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