Hawaii location data
Isopleth answers questions about any coordinate or street address in Hawaii with 351 public-data fields from 95 sources: flood and wildfire risk, soils and slope, the power grid, water and roads, climate, and county economics. Each value carries its source, license and vintage. Use it from the REST API or through the MCP server in Claude, ChatGPT, Cursor and other assistants.
Parcel coverage in Hawaii
Parcel records: 384,035 parcels in 5 counties. Published by Hawaii Statewide GIS Program; Counties of Hawaii, Honolulu, Kauai and Maui (Public, attribution); May 2026, refreshed annual.
Not published here: owner name, site address, total value, land use, sale date, zoning, year built.
Sample values in Hawaii
What our API returned at the Census Bureau's interior point of Hawaii's 3 largest counties by land area, computed 2026-10-29. One point is not a whole county: values can change within a few hundred meters, so look up your own site. "No data" means the dataset has nothing at that point.
| field | Hawaii County | Maui County | Kauai County |
|---|---|---|---|
| Hazards | |||
| FEMA flood zone | D | X | X |
| Inside a mapped floodplain | No | No | No |
| Wildfire, annual frequency | 0.0049 events a year | 0.0063 events a year | 0.0025 events a year |
| Tornado, annual frequency | 0.0020 events a year | 0.00043 events a year | 0.00067 events a year |
| Hail, annual frequency | 0.012 events a year | 0.0033 events a year | 0 events a year |
| On a mapped wetland | No | No | No |
| Nearest mapped wetland | no data | 179 m | 118 m |
| Land | |||
| Elevation | 2,515 m (8,250 ft) | 836 m (2,742 ft) | 254 m (835 ft) |
| Slope | 15.8° | 47.8° | 29.2° |
| Soil drainage | Excessively drained | no data | Well drained |
| Soil hydrologic group | A | C | D |
| Farmland class | Prime | Prime | Prime |
| On protected land (PAD-US) | Yes | Yes | Yes |
| Surface manager | Private or unknown | Private or unknown | Private or unknown |
| Climate & energy | |||
| Solar resource (GHI) | 6.12 kWh/m²/day | 5.04 kWh/m²/day | 5.00 kWh/m²/day |
| Mean wind speed at 100 m | 5.7 m/s | 9.5 m/s | 3.1 m/s |
| Infrastructure | |||
| Nearest substation (69 kV+) | 30.0 km (18.6 mi) | 6.4 km (4.0 mi) | 5.1 km (3.1 mi) |
| Electric utility | HAWAII ELECTRIC LIGHT CO INC | MAUI ELECTRIC CO LTD | KAUAI ISLAND UTILITY COOPERATIVE |
| In a public water service area | No | No | No |
| Depth to water, nearest monitored well | no data | 251.8 m (826 ft) | 14.8 m (49 ft) |
| Nearest major road | 10.6 km (6.6 mi) | 4.6 km (2.9 mi) | 421 m |
| Community | |||
| Nearest fire station | no data | 10.2 km (6.4 mi) | 7.4 km (4.6 mi) |
| Nearest hospital | no data | 3.7 km (2.3 mi) | 4.1 km (2.6 mi) |
| Nearest school | no data | 7.0 km (4.4 mi) | 4.5 km (2.8 mi) |
| In an Opportunity Zone | No | No | No |
County pages
- Hawaii County 4,028 sq mi of land
- Maui County 1,162 sq mi of land
- Kauai County 620 sq mi of land
Datasets that returned data at these points
| source | fields |
|---|---|
BLM_SMA Bureau of Land Management | surface_management_agency |
EIA_POWER U.S. Energy Information Administration | electric_utility_service_territory, nearest_substation_distance_m |
EPA_CWS_SERVICE_AREAS U.S. Environmental Protection Agency | within_water_service_area |
FEMA_NFHL Federal Emergency Management Agency | nfhl_flood_zone, within_floodplain_polygon |
FEMA_NRI Federal Emergency Management Agency | hail_annual_frequency, tornado_annual_frequency, wildfire_annual_frequency |
GLOBAL_WIND_ATLAS_V3 See source_url | mean_wind_speed_100m_ms |
HUD_OPPORTUNITY_ZONES U.S. Department of Housing and Urban Development | in_opportunity_zone |
NREL_SOLAR_RESOURCE_V1 NREL Solar Resource Data (NSRDB) | ghi_annual_kwh_m2_day |
OVERTURE_PLACES © Overture Maps Foundation | nearest_fire_station_distance_m, nearest_hospital_distance_m, nearest_school_distance_m |
OVERTURE_TRANSPORTATION © Overture Maps Foundation, © OpenStreetMap contributors | nearest_major_road_distance_m |
PAD_US USGS Protected Areas Database of the United States (PAD-US) | intersects_protected_area |
USDA_SSURGO U.S. Department of Agriculture | prime_farmland_classification, soil_drainage_class, soil_hydrologic_group |
USFWS_NWI U.S. Fish and Wildlife Service | intersects_wetland, nearest_wetland_distance_m |
USGS_3DEP_COG U.S. Geological Survey | elevation, slope_degrees |
USGS_NWIS_OGC U.S. Geological Survey | nearest_groundwater_well_depth_to_water_m |
These are only the sources behind the fields sampled here. The full list is on Sources & licenses and every field is in the field catalog.
What people use it for in Hawaii
- Land buyers: screen a lot for flood zone, wetlands, slope, soils, road and water access before a site visit; search Hawaii parcels by county, acreage or land use. Buyers who want it written up can order a $29 report on Check the Land, which is built on Isopleth.
- Solar, wind and data-center siting: distance to transmission and substations, solar and wind resource, protected land.
- Insurance and lending: hazard frequencies and floodplain status for every address in a book.
- Real estate and research: county income, growth and house-price trends next to on-the-ground facts.
See use cases for prompts and the exact fields.
Try it
curl https://api.isopleth.dev/v1/fetch -H "Authorization: Bearer $ISOPLETH_KEY" \
-H "Content-Type: application/json" \
-d '{"lat": 19.597764, "lng": -155.502443, "preset": "site_selection"}'
Or ask your assistant: “Using Isopleth, what are the flood zone, slope and soil drainage at 19.5978, -155.5024?”
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