wofs-validation

Code and data for validation of WOfS in Africa.

• 01 ) Stratified sampling for validation
• 02 ) Validation data pre-processing, analysis, and plots
• 03 ) Figures for paper and further data visualisations

The actual validation data was collected externally using the Collect Earth Online tool. This chronologically happened between 01) and 02), during 2020 and 2021.

01_ndwi_sampling

Stratified sampling of WOfS, used for the product validation process.

This data was originally generated from Landsat Collection 2 Provisional data.

Re-running any of these notebooks will require a code update to use the latest Landsat products and DE Africa Tools package.

• shapes folder: AEZ shapefiles and Landsat 8 tiles
• wofs_summary_aez folder: summary of results for each AEZ See folder README for notebook details.

02_Validation_data

Raw and pre-processed data collected from the validation analysts.

• CEO_raw_data folder: Validation data exported from Collect Earth Online. Split by Implementing Partner organisation. Previously named CEO.
• Processed folder: Results of 02_Validation_notebooks/01_Inspect_CEO pre-processing notebook
• AEZ_shapefiles folder: AEZ shapefiles used in the validation notebooks

02_Validation_notebooks

Series of notebooks conducting the pre-processing, analysis, and plotting of WOfS data.

• Plots folder: Seasonal accuracy plots per AEZ; AEZ overall/producer's/user's accuracy maps per AEZ for provisional (beta) Collection 2 WOfS and non-provisional (production) Collection 2 WOfS; accuracy difference plot between the two

See folder README for notebook details.

03_Figures_for_paper

Figures, and code/files to produce figures for academic or general use. Folder README contains a description of parent and output files. Inkscape (open source software) can be used to edit the SVG files.

Repository convention

• 02_Validation_results/Beta contain results from the Landsat Collection 2 Provisional WOfS data
• 02_Validation_results/wofs_ls contains results from operational (Collection 2 not-Provisional) WOfS data
• "CEO" refers to Collect Earth Online, the spatial analysis tool used to consolidate validation data
• 01_ndwi_sampling folder contains all stratified sampling code (originally from the sandbox-notebooks repository)

Quick reference

• Stratified sampling strata were defined in ndwi_sampling/04_Sampling
• The WOfS database is queried for the first 5 days before and after the start of each calendar month - see Notebooks/02_Processing
• AEZ shapefiles are available from 02_Validation_data/AEZs