Datasets

Projects, land and the systems around them. Explore what we cover, how far the history goes, and how to put it to work.

Each product brings related layers together. Geographic coverage, source dates and historical depth are specified within each product.

How we describe time

Longitudinal data follows the same projects, places or measures over time. Reference data describes a particular inventory or reporting period. Both have a place in a useful assessment.

All data layers

Explore the fields, geographic coverage and historical availability inside each dataset.

51 datasetsRecord counts observed 2026-09-23

Counts describe source records, route sections, area features, or linked projects as labeled. Source dates and geographic coverage vary by dataset.

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