Where this answer comes from.
Each of these has its own page naming the office that publishes it, how often it updates, and what it cannot answer. Rebuilt from the ParcelOps source directory on September 9, 2026.
USGS Elevation
Ground elevation for US properties and land, from the US Geological Survey.
FEMA Flood Zones
Flood hazard maps from FEMA, for an early check on a US property.
Where this stops.
The part a search result will not tell you, and the part worth reading before this answer goes into a decision.
- Model resolution varies across the country. In flat terrain the difference between two nearby points can sit inside the model’s own error.
- An elevation certificate is a surveyed document with legal standing for insurance rating. A modeled value has none.
Questions people ask alongside this one.
Is this property in a flood zone?
A flood zone answer is a letter read off a specific FEMA map panel with an effective date. What each zone means, and why outside a zone is not the same as safe.
What census tract is this address in?
Federal program designations are published by census tract, not by address. How to resolve an address to its state, county, tract, and block codes, and why the vintage matters.
Are there wetlands on this property?
The national wetlands inventory is a map layer compiled from imagery, not a jurisdictional determination. What the classification codes mean and where the layer stops.
Is this property in a wildfire risk area?
There is no national wildfire zone the way there is a flood zone. What the modeled risk metrics at a point actually describe, and what decides one house.
Is there a dam near this property?
Listed dams near a point with hazard class and condition rating. Hazard class describes consequence, not likelihood, and proximity to a dam is not inundation risk.
Have earthquakes been recorded near this site?
The published earthquake catalog around a coordinate, with magnitude, depth, and date. Why a quiet catalog is a statement about the instrument record, not about hazard.
The lanes this question belongs to.
A lane page lists every source that kind of work reads, not only the ones behind this question, and states where the whole lane stops.
Run it on a property you already know.
The free plan includes 50 tool calls for the life of the account. They never expire and never refill, and there is no credit card. Ask this question about an address whose answer you can check.