States / Wisconsin
Wisconsin location data
Isopleth answers questions about any coordinate or street address in Wisconsin 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 Wisconsin
Parcel records: 3,574,638 parcels in 72 counties. Published by Wisconsin State Cartographer's Office / WLIP at DOA (Public, attribution); V12 (2026 release; tax roll 2025), refreshed annual.
Share of parcels with each column filled: owner name 98%, site address 70%, total value 88%, land use 88%. Not published here: sale date, zoning, year built.
Sample values in Wisconsin
What our API returned at the Census Bureau's interior point of Wisconsin'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 | Marathon County | Bayfield County | Marinette County |
|---|---|---|---|
| Hazards | |||
| FEMA flood zone | X | X | no data |
| Inside a mapped floodplain | No | No | No |
| Wildfire, annual frequency | 0.000036 events a year | 0.00012 events a year | 0.000048 events a year |
| Tornado, annual frequency | 0.038 events a year | 0.026 events a year | 0.021 events a year |
| Hail, annual frequency | 2.2 events a year | 1.2 events a year | 1.3 events a year |
| Current drought category | D1 | D3 | D2 |
| On a mapped wetland | No | No | No |
| Nearest mapped wetland | 17 m | 391 m | 90 m |
| Land | |||
| Elevation | 412 m (1,350 ft) | 370 m (1,215 ft) | 227 m (745 ft) |
| Slope | 3.9° | 7.8° | 1.9° |
| Soil drainage | Somewhat poorly drained | Excessively drained | Excessively drained |
| Soil hydrologic group | B/D | A | A |
| Farmland class | Prime | Prime | Prime |
| Land use | Agriculture | Forest | Forest |
| Crop or cover (CDL) | Deciduous Forest | Mixed Forest | Deciduous Forest |
| Dominant crop, 5 years | Soybeans | no data | no data |
| Tree canopy | 43% | 75% | 68% |
| On protected land (PAD-US) | No | Yes | No |
| Surface manager | Private or unknown | Usfs | Private or unknown |
| Climate & energy | |||
| Annual precipitation (normal) | 840 mm (33 in) | 808 mm (32 in) | 790 mm (31 in) |
| Days above 32 °C a year | 3 days | 2 days | 5 days |
| Solar resource (GHI) | 3.81 kWh/m²/day | 3.63 kWh/m²/day | 3.77 kWh/m²/day |
| Mean wind speed at 100 m | 7.0 m/s | 7.3 m/s | 6.5 m/s |
| Wind capacity factor | 34% | 35% | 31% |
| Infrastructure | |||
| Nearest transmission line | no data | no data | 1.0 km (0.6 mi) |
| Nearest substation (69 kV+) | 7.1 km (4.4 mi) | 7.6 km (4.7 mi) | 14.0 km (8.7 mi) |
| Nearest gas pipeline | 12.8 km (7.9 mi) | 5.7 km (3.6 mi) | 24.9 km (15.5 mi) |
| Electric utility | WISCONSIN PUBLIC SERVICE CORP | BAYFIELD ELECTRIC COOP, INC | WISCONSIN PUBLIC SERVICE CORP |
| In a public water service area | No | No | No |
| Depth to water, nearest monitored well | 1.8 m (6 ft) | 52.6 m (173 ft) | 4.1 m (13 ft) |
| Nearest major road | 407 m | 11.5 km (7.1 mi) | 2.1 km (1.3 mi) |
| Community | |||
| Nearest fire station | 7.4 km (4.6 mi) | 22.0 km (13.7 mi) | 4.5 km (2.8 mi) |
| Nearest hospital | 8.8 km (5.4 mi) | 22.8 km (14.2 mi) | 13.3 km (8.3 mi) |
| Nearest school | 6.8 km (4.2 mi) | 19.8 km (12.3 mi) | 5.3 km (3.3 mi) |
| County median household income | no data | no data | $63,809 |
| County population growth, 1 year | no data | no data | +0.4% |
| County house prices, year over year | no data | no data | +8.2% |
| In an Opportunity Zone | No | No | No |
County pages
- Marathon County 1,545 sq mi of land
- Bayfield County 1,478 sq mi of land
- Marinette County 1,400 sq mi of land
Datasets that returned data at these points
| source | fields |
|---|---|
BLM_SMA Bureau of Land Management | surface_management_agency |
CENSUS_ACS U.S. Census Bureau | county_median_household_income |
CENSUS_PEP U.S. Census Bureau | county_population_growth_1yr_pct |
EIA_ATLAS U.S. Energy Information Administration | nearest_gas_pipeline_distance_m, nearest_transmission_line_distance_m |
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 |
FHFA_HPI Federal Housing Finance Agency | county_hpi_yoy_pct |
HUD_OPPORTUNITY_ZONES U.S. Department of Housing and Urban Development | in_opportunity_zone |
JRC_PVGIS_NSRDB See source_url | ghi_annual_kwh_m2_day |
NOAA_NCEI_NCLIMGRID_DAILY National Oceanic and Atmospheric Administration | days_above_32c_annual_count |
NOAA_NCEI_NORMALS_GRIDDED National Oceanic and Atmospheric Administration | annual_precipitation_normal_mm |
NREL_REV_LANDBASED_WIND_SC_2024 NREL reV supply curves, Open Energy Data Initiative (OEDI) | wind_capacity_factor_pct |
NREL_WIND_TOOLKIT NREL WIND Toolkit (Draxl et al., 2015) | mean_wind_speed_100m_ms |
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_CDL U.S. Department of Agriculture | cdl_class, dominant_crop_5y |
USDA_SSURGO U.S. Department of Agriculture | prime_farmland_classification, soil_drainage_class, soil_hydrologic_group |
USDM_CURRENT The U.S. Drought Monitor is jointly produced by the National Drought Mitigation Center at the University of Nebraska-Lincoln, the United States Department of Agriculture, and the National Oceanic and Atmospheric Administration. Map courtesy of NDMC. | drought_category |
USFS_LCMS USDA Forest Service | land_use_class |
USFS_NLCD_TCC USDA Forest Service | tree_canopy_pct |
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 Wisconsin
- Land buyers: screen a lot for flood zone, wetlands, slope, soils, road and water access before a site visit; search Wisconsin 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": 44.898036, "lng": -89.757823, "preset": "site_selection"}'
Or ask your assistant: “Using Isopleth, what are the flood zone, slope and soil drainage at 44.8980, -89.7578?”
Look up any place in Wisconsin.1,000 free lookups every month · no card
Get a free API key →Look up any place in Wisconsin.Signed in · loading lookups · UpgradeBuy a top-up
Go to dashboard →Next: West Virginia · Wyoming · all states