Free tool · Inventory · no sign-up

Log Volume (Hoppus & Huber)

Estimate the volume of a felled log from its mid-girth and length using both the Hoppus (quarter-girth) and Huber (true) methods.

Who it's for: Forest users, timber registers and Division Forest Office staff checking a felling record.

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.