Tools to transform a shapefile in a netcdf mask. The grid, input and output projections can be customized.
The script uses python3, and requires the following libraries:
- numpy
- xarray
- netCDF4
- pyproj
- shapely
- geopandas
- matplotlib
This script has been tested with a miniconda installation on the conda-forge
channel, and on the python installation of ubuntu 20.04.3 LTS.
Start by install with the command:
pip3 install .and just run the following command to access to the documentation:
shp2ncmask --helpAll examples below can be reproduced by running:
./run_examples.shDATA0=data/gadm41_FRA_shp/gadm41_FRA_0.shp
shp2ncmask --method weight --input $DATA0 --iepsg 4326 --output data/mask_4326.nc --grid -5,10,0.5,41,52,0.5 --oepsg 4326 --figure figures/control_4326.png --fepsg 4326
DATA0=data/gadm41_FRA_shp/gadm41_FRA_0.shp
shp2ncmask --method weight --input $DATA0 --iepsg 4326 --output data/mask_27572.nc --grid 60000,1196000,64000,1617000,2681000,64000 --oepsg 27572 --figure figures/control_27572_64km.png --fepsg 4326
## We print the columns, rows, select to find bounds and we build the mask.
DATA1=data/gadm41_FRA_shp/gadm41_FRA_1.shp
shp2ncmask --input $DATA1 --list-columns
shp2ncmask --input $DATA1 --describe-column NAME_1
shp2ncmask --input $DATA1 --select NAME_1 'ÃŽle-de-France' --bounds
shp2ncmask --method weight --input $DATA1 --select NAME_1 'ÃŽle-de-France' --grid 1.4,3.6,0.05,48.1,49.3,0.05 --output data/mask_IDF_4326.nc --figure figures/control_IDF_4326.png --fepsg 4326
## The last is also the IDF, but in LambertII coordinates, so we change the input epsg to find the bounds
DATA1=data/gadm41_FRA_shp/gadm41_FRA_1.shp
shp2ncmask --input $DATA1 --select NAME_1 'ÃŽle-de-France' --iepsg 27572 --bounds
shp2ncmask --method weight --input $DATA1 --select NAME_1 'ÃŽle-de-France' --grid 534000,700000,8000,2340000,2480000,8000 --output data/mask_IDF_27572.nc --oepsg 27572 --figure figures/control_IDF_27572_8km.png --fepsg 4326
Copyright(c) 2021 / 2023 Yoann Robin
This file is part of Shp2ncmask.
Shp2ncmask is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
Shp2ncmask is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with Shp2ncmask. If not, see https://www.gnu.org/licenses/.
