gtmenichino/staf-data

STAF data: the browser mirror

The data the static STAF web app (EASI, SFARI and DEEP; the Stream Tiered Assessment Framework, https://usace-wrises.github.io/staf/) reads by HTTP range. Every file mirrors an asset of a GitHub release of https://github.com/USACE-WRISES/staf, which stays the source:

• bundle/: the STAF data bundle (staf-data-current), unzipped: NHDPlus HR flowlines, catchments and their shared borders, precomputed per-catchment values, the NHDPlus V2 crosswalk with StreamCat, and national point tables (WQP, NID, NWIS, NAS), for the lower 48.
• xs/: the national cross-section grid (staf-xs-current, published region by region): every section's scoring numbers, what drawing or pulling a section needs, one profile per segment.
• points/: the bundle's national point tables (dams, stream gages, water-quality stations and results) sorted by place in small row groups, so a lookup near a site reads a few kilobytes.
• library/: the STAF assessment library (library): DEEP's regional assessments, calculators and EASI's method packages.
• engine/: the data files the STAF site engine ships with: the USGS base-flow index grid (Wolock 2003), the EPA Level III ecoregions and the physiographic divisions.

The files the app reads a few rows of at a time (each region's stream lines, StreamCat rows, V2 attributes and point extras, and the cross-section files) are written again with the same rows and values in small pages with a page index, so a read takes kilobytes; topo/ holds each region's network topology on its own. JSON and GeoJSON files are stored gzipped (.gz).

Files are stored under content-hashed names and never change in place; web-manifest.json (updated last) maps each logical name to its file, size and sha256. Built from public federal datasets (USGS, EPA, USACE, NOAA, USDA, FWS); see the STAF repository for sources and methods.