[ncl-talk] shapefiles

[Dave Allured - NOAA Affiliate]

Vanúcia,

Shape files come in different varieties.  It looks like example
shapefiles_21 may need an upgrade to be able to read your shape file.  If
you can send a copy of the shape file, and also your current script
shape21.ncl, I will test it on my system.  Please do not include the
scientific data file; I do not need it for testing the shape file.  The NCL
support team might need to fix this.

--Dave


On Mon, Jan 28, 2019 at 9:47 AM Vanúcia Schumacher <
vanucia-schumacher at hotmail.com> wrote:

> Thanks for the tip.
> I'm trying to use the script from example shapefiles_21, but I'm having
> this error in function. I can not fix it.
>
> fatal:Subscript out of range, error in subscript #0
> fatal:An error occurred reading features
> fatal:["Execute.c":8640]:Execute: Error occurred at or near line 56 in
> file shape21.ncl
>
> fatal:["Execute.c":8640]:Execute: Error occurred at or near line 250 in
> file shape21.ncl
>
>
> The lines correspond to:
>
>
> function get_areas_of_interest(shp_file_name,shp_var_name,opt[1]:logical)
> begin
> ;---Open the shapefile
>   f = addfile(shp_file_name,"r")
>   features = f->$shp_var_name$
>
>   if(opt.and.isatt(opt,"areas_to_exclude")) then
>     features at _FillValue = default_fillvalue(typeof(features))
>     do na=0,dimsizes(opt at areas_to_exclude)-1
>       ii := ind(features.eq.opt at areas_to_exclude(na))
>       if(.not.any(ismissing(ii))) then
>         features(ii) = features at _FillValue
>       end if
>     end do
>     return(features(ind(.not.ismissing(features))))    ------>  line 56
>   else
>     return(features)
>   end if
> end
>
> opt                  = True
>  opt at areas_to_exclude = areas_of_interest
>   areas_to_fill        =
> get_areas_of_interest(shp_filename1,shape_var_name,opt)    ----> line 250
>
> Infos:
>
> 0) Terrain Height (m) : min=0   max=5070.39
> (0) ======================================================================
> (0) Filename: "cuencasx.shp"
> (0)    Geometry type: polygon
> (0)    # of features: 4
> (0)    Min/max lat:    -34.77/ -34.23
> (0)    Min/max lon:    -70.53/ -70.13
> (0)    Variable names and their types:
> (0)        geometry : integer
> (0)        segments : integer
> (0)        x : double
> (0)        y : double
> (0)        COD_CUEN : string
> (0)        COD_SUBC : string
> (0)        COD_SSUBC : string
> (0)        NOMBRE : string
> (0)        AREAKM2 : double
> (0) ======================================================================
>
> Variable: features
> Type: string
> Total Size: 32 bytes
>             4 values
> Number of Dimensions: 1
> Dimensions and sizes: [num_features | 4]
> Coordinates:
> Number Of Attributes: 0
> (0) Cuenca Cipreses
> (1) Cuenca Coton
> (2) Cuenca Cortaderal
> (3) Cuenca Universidad
> (0) ==================================================
> (0) Shapefile:         cuencasx.shp
> (0) Areas of interest: Cuenca Cipreses,Cuenca Coton,Cuenca
> Cortaderal,Cuenca Universidad
> (0) min_lat_chk:       -37.4943
> (0) max_lat_chk:       -31.9474
> (0) min_lon_chk:       -73.6526
> (0) max_lon_chk:       -66.7254
> (0) min_lat_data:      -37.4943
> (0) max_lat_data:      -31.9474
> (0) min_lon_data:      -73.6526
> (0) max_lon_data:      -66.7254
> (0) 4761 data values originally
> (0) Will keep data values inside given shapefile areas
> (0) ==================================================
> (0) 13 data values kept
> (0) shapefile_mask_data: elapsed time: 0.00758901 CPU seconds.
> (0) ==================================================
>
>
> *De:* Dave Allured - NOAA Affiliate <dave.allured at noaa.gov>
> *Enviado:* domingo, 27 de janeiro de 2019 18:23
> *Para:* Vanúcia Schumacher
> *Cc:* ncl-talk at ucar.edu
> *Assunto:* Re: [ncl-talk] shapefiles
>
> Vanúcia,
>
> Your two data files are on different grids.  If you only need to make
> plots that show the same region on a map, then use graphics masking, not
> data masking.  See the third plot in example shapefiles_21 on this page:
>
> https://www.ncl.ucar.edu/Applications/shapefiles.shtml
>
> If you need to perform calculations between the two data sets, then you
> will need to regrid the data from one file to match the other grid.  Please
> see this documentation for regridding:
>
> https://www.ncl.ucar.edu/Applications/regrid.shtml
> https://www.ncl.ucar.edu/Applications/ESMF.shtml
>
> --Dave
>
>
> On Sun, Jan 27, 2019 at 12:40 PM Vanúcia Schumacher <
> vanucia-schumacher at hotmail.com> wrote:
>
> Hi all,
>
> I need support to find the problem with my script, with the purpose of
> cutting two different data in a shapefile, but keeping the information
> such as time lat and lon.
> My script (attachment) is "cutting" the region from shapefile different
> for each input (data) (see Figure attachment).
> I'd like to select the shapefile region of the same size independent of
> the input file, and keep the time, lat, and lon information.
>
> I appreciate any help
>
>
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