# ndpyramid
A small utility for generating ND array pyramids using Xarray and Zarr.
[](https://github.com/carbonplan/ndpyramid/actions/workflows/main.yaml)
[](https://anaconda.org/conda-forge/ndpyramid)
[](https://opensource.org/licenses/MIT)
[](https://codecov.io/gh/carbonplan/ndpyramid)
# installation
Ndpyramid can be installed in three ways:
Using the [conda](https://conda.io) package manager that comes with the Anaconda/Miniconda distribution:
```shell
conda install ndpyramid --channel conda-forge
```
Using the [pip](https://pypi.org/project/pip/) package manager:
```shell
python -m pip install ndpyramid
```
To install a development version from source:
```python
git clone https://github.com/carbonplan/ndpyramid
cd ndpyramid
python -m pip install -e .
```
## optional dependencies
Depending on your use case you can specify optional dependencies on install.
```
python -m pip install "ndpyramid[xesmf]" # Install optional dependencies for regridding with ESMF
python -m pip install "ndpyramid[dask]" # Install optional dependencies for resampling with pyresample and Dask
python -m pip install "ndpyramid[complete]" # Install all optional dependencies
```
# usage
Ndpyramid provides a set of utilities for creating pyramids with standardized metadata.
The example below demonstrates the usage of the `pyramid_coarsen` and `pyramid_reproject`
utilities. Check out [the examples gallery](https://ndpyramid.readthedocs.io/en/latest/gallery.html)
for more complete demonstrations.
```python
import xarray as xr
import rioxarray
from ndpyramid import pyramid_coarsen, pyramid_reproject
# make a reprojected (EPSG:3857) pyramid
ds = ds.rio.write_crs('EPSG:4326')
pyramid = pyramid_reproject(ds, levels=2)
# write the pyramid to zarr
pyramid.to_zarr('./path/to/write')
```
See the docstrings and [API documentation](https://ndpyramid.readthedocs.io/en/latest/api.html) for more details about input parameters and options.
## license
All the code in this repository is [MIT](https://choosealicense.com/licenses/mit/)-licensed, but we request that you please provide attribution if reusing any of our digital content (graphics, logo, articles, etc.).
## about us
CarbonPlan is a nonprofit organization that uses data and science for climate action. We aim to improve the transparency and scientific integrity of climate solutions with open data and tools. Find out more at [carbonplan.org](https://carbonplan.org/) or get in touch by [opening an issue](https://github.com/carbonplan/ndpyramid/issues/new) or [sending us an email](mailto:hello@carbonplan.org).
