TechnicalGIS

#GHSL

2 posts

Season condition answer for Marsabit, Kenya, October to December 2022, with rainfall below normal and vegetation the lowest since 2001

Article Remote Sensing

Free community tools: season condition and flood impact for any district

Two free tools for any district: is this season's rain and crop growth better or worse than usual, and where did it flood and how many people live there? Worked examples from Marsabit, Kenya, in 2022 and Feni, Bangladesh, in 2024.

Beginner 5 min read

Tutorial Python

Zonal statistics in Python: exactextract vs rasterstats, with partial pixels, land-cover fractions and a benchmark

Calculate zonal statistics in Python with exactextract and rasterstats on real data: ONS 2021 LSOA boundaries for Cumbria with GHSL population, the Copernicus DEM and ESA WorldCover. Covers partial-pixel weighting vs pixel centroids, CRS alignment, categorical land-cover fractions, a speed benchmark, GeoPackage export and choropleth maps.

Intermediate 14 min read