bigearthnet-gdf-builder 0.1.4

A package to generate and extend BigEarthNet GeoDataFrame's.

BigEarthNet GeoDataFrame Builder

A package to generate and extend BigEarthNet GeoDataFrame's.

This library provides a collection of functions to generate and extend GeoDataFrames for the BigEarthNet dataset.

bigearthnet_gdf_builder tries to accomplish two goals:

1. Easily generate geopandas GeoDataFrame by passing a BigEarthNet archive directory.
   • Allow for easy top-level statistical analysis of the data in a familiar pandas-style
   • Provide functions to enrich GeoDataFrames with often required BigEarthNet metadata (like the season or country of the patch)
2. Simplify the building procedure by providing a command-line interface with reproducible results

Installation

TL;DR

The most relevant functions are exposed as CLI entry points.

To build the tabular data, use:

• ben_gdf_builder --help or
• python -m bigearthnet_gdf_builder.builder --help

Deep Learning

One of the primary purposes of the dataset is to allow deep learning researchers and practitioners to train their models on multi-spectral satellite data. In that regard, there is a general recommendation to drop patches that are covered by seasonal snow or clouds. Also, the novel 19-class nomenclature should be preferred over the original 43-class nomenclature. As a result of these recommendations, some patches have to be excluded from the original raw BigEarthNet dataset that is provided at BigEarthNet.

To simplify the procedure of pre-converting the JSON metadata files, the library provides a single command that will generate a recommended GeoDataFrame with extra metadata (country/season data of each patch) while dropping all patches that are not recommended for deep learning research. Functions for both archives, BEN-S1 and BEN-S2, are provided.

To generate such a GeoDataFrame and store it as an parquet file, use:

• ben_gdf_builder build-recommended-s2-parquet (available after installing package) or
• python -m bigearthnet_gdf_builder.builder build-recommended-s2-parquet
• ben_gdf_builder build-recommended-s1-parquet (available after installing package) or
• python -m bigearthnet_gdf_builder.builder build-recommended-s1-parquet

If you want to read the raw JSON files and convert those to a GeoDataFrame file without dropping any patches or adding any metadata, use:

• ben_gdf_builder build-raw-ben-s2-parquet (available after installing package) or
• python -m bigearthnet_gdf_builder.builder build-raw-ben-s2-parquet
• ben_gdf_builder build-raw-ben-s1-parquet (available after installing package) or
• python -m bigearthnet_gdf_builder.builder build-raw-ben-s1-parquet

Relation to bigearthnet_common

There exists a logical, circular dependency between bigearthnet_common and this project. bigearthnet_gdf_builder uses functions from bigearthnet_common to safely read the BigEarthNet JSON metadata files from the Sentine-1/2 archives.

The resulting raw GeoDataFrame is further processed to the extended representation with extra metadata (season of the acquisition date, country, 19-class nomenclature, etc.).

To easily provide a dependency free interaction with BigEarthnet, mainly to quickly create subsets, some of these results are distributed in the bigearthnet_common package. For example, this allows a user to quickly retrieve the corresponding S2 patch of an S1 input patch without needing to access the JSON file or the result of the bigearthnet_gdf_builder.

The correctness of some bigearthnet_common functions depend on the correctness of this project! As such, bigearthnet_gdf_builder should never use functions from bigearthnet_common that make use of the distributed data.

Contributing

Contributions are always welcome!

Please look at the corresponding ipynb notebook from the nbs folder to review the source code. These notebooks include extensive documentation, visualizations, and tests. The automatically generated Python files are available in the bigearthnet_gdf_builder module.

More information is available in the contributing guidelines document.