Open soil database, built by hand

The world's soils,
sampled and shared.

Terrafile is a public repository where anyone can log, browse, and compare soil samples — with structured metadata, photos, and community notes.

O · A · B · C

A hand-drawn soil profile

From litter layer to bedrock.

Explore soil samples geographically. Filter by region, texture, or tags.

Compare pH, organic matter, and texture across multiple samples.

A validated intake form standardizes every entry to keep data usable.

Bite-size guides on horizons, the texture triangle, and nutrients.

Sample map

Every contribution pinned to the earth it came from.

Every sample is a snapshot of a place, a season, a hand. Together they build a picture no single lab could gather.

Samples archived

Regions represented

Unique tags