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NDVI Calculator

Compute the Normalised Difference Vegetation Index from red and near-infrared reflectance and read its vegetation class.

Who it's for: Students and practitioners reading a satellite or drone index for the first time.

All 10 toolsOpen dataObservatoryClimate Analytics

More free tools

Nine more that show their working.

Every tool publishes its formula, sources, assumptions and limits. Browse all tools →

Open data

Released, with attribution.

Where a dataset can safely be public, we release it. Credit GeoSutra and the partners named.

GeoJSON

Manakamana tree crowns

6,543 detected crown polygons from the UAV survey. Credit: GeoSutra with Shree Manakamana CFUG and the Division Forest Office, Nawalpur.

Download → Aerial frames

Nuwakot flood imagery

16 georeferenced frames over Gairathok, Bidur-10 and Tupche, 27 August 2026.

Field report → JSON

Climate normals & warming trends

For all 753 local governments, derived from cited open climate datasets. Also warming-trends.json.

Download → Live map

Observatory

Nepal-clipped biodiversity, active-fire and climate layers, summarised by management unit.

Open → Live map

Climate Analytics

Normals, trends and CMIP6 projections, local government by local government.

Open → JSON

Reference tables

The species, glossary and NTFP datasets behind the tools. Also glossary · ntfp.

Download →

Open sources we build on: GBIF · iNaturalist · NASA FIRMS · CHELSA · Copernicus · OpenStreetMap / HOTOSM (ODbL) · national boundaries. How we handle data: data governance.