Operator guidance
Source definitions, scoring rules, and verification steps where operators need them.
Glossary
APN
Assessor Parcel Number — the county's ID for a parcel.
SFHA
Special Flood Hazard Area — FEMA-mapped land with elevated flood risk.
NWI
National Wetlands Inventory — the USFWS screening map of likely wetlands.
SSURGO
The USDA soil survey database — what the soil is, at survey scale.
Arms-length
A sale between unrelated parties at market terms — the kind a comp should be.
Reference data — not a survey, title search, flood insurance determination, appraisal, or legal conclusion. Verify with the authoritative source before acting. Use the data label and source dates shown with each record to assess its limitations.