Data layers and sources
Turn layers on and off from Layers on the right of the map. Layers stack, except background maps and whole-county fills (soils, stormwater, watershed, zoning), which show one at a time.
Every layer is drawn live from its publisher’s server; if one is down, that layer shows a warning. Where the data comes from covers freshness. Parcel outlines, owners and values come from each county; see coverage levels.
Due diligence
| Layer | Source | Covers |
|---|---|---|
| Flood zones 100-year (1%) zone, floodway and 500-year (0.2%) zone. | FEMA National Flood Hazard Layer (Esri Living Atlas copy) | Nationwide |
| Wetlands Mapped wetlands. Small or recent wetlands may be missing; a delineation is the final word. | US Fish and Wildlife Service, National Wetlands Inventory | Nationwide |
| Stream buffers Water supply and special waters that bring wider buffers. | NC Department of Environmental Quality, surface water classifications | North Carolina |
| Streams and lakes Creeks, rivers, ponds and lakes. | NC OneMap hydrography | North Carolina |
| Soil types Soil map units. Tap the map for drainage and the septic rating. | USDA NRCS soil survey (SSURGO) | Nationwide |
| Superfund sites Sites on the federal cleanup list. | US EPA, National Priorities List | Nationwide |
| Toxic release sites Facilities that report releases of listed chemicals. | US EPA, Toxics Release Inventory | Nationwide |
Boundaries
| Layer | Source | Covers |
|---|---|---|
| Census tracts Tract lines and numbers. | US Census Bureau, TIGERweb | Nationwide |
| Town limits Inside a town usually means town zoning. | NC Department of Transportation, municipal boundaries | North Carolina |
| Conservation land Easements, parks and game lands. | NC Natural Heritage Program, managed areas | North Carolina |
Zoning
| Layer | Source | Covers |
|---|---|---|
| Stormwater permitting Local program, state program, several, or none. | NC Department of Environmental Quality, post-construction stormwater map | North Carolina |
| Watershed protection Water supply watershed classes cap building density. | NC Division of Water Resources, water supply watersheds (2014) | North Carolina |
| Zoning Only where the county publishes one online. The parcel card names the zoning district. | Each county's or town's own zoning map | Some NC counties |
Energy
| Layer | Source | Covers |
|---|---|---|
| Power lines High-voltage lines and their owners. | HIFLD open data, electric transmission lines | Nationwide |
| Gas pipelines Interstate and intrastate natural gas pipelines. | US Energy Information Administration | Nationwide |
Topography
| Layer | Source | Covers |
|---|---|---|
| Slope shading The ground shaded so slopes stand out. | USGS 3D Elevation Program | Nationwide |
| Contour lines Finer lines as you zoom in. | USGS National Map contours | Nationwide |
Utilities
| Layer | Source | Covers |
|---|---|---|
| Water and sewer (2004) Old, but the only statewide map of lines. | NC OneMap 2004 water and sewer survey | North Carolina |
| Roads Used to measure road frontage. | NC 911 road centerlines (NC OneMap) | North Carolina |
Background
| Layer | Source | Covers |
|---|---|---|
| Topo map | USGS topographic base map | Nationwide |
| Aerial photo Esri's loads fast; NC OneMap's is newer and sharper but slower. | Esri World Imagery; NC OneMap latest statewide photo | Nationwide |