Texas location data
Isopleth answers questions about any coordinate or street address in Texas 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 Texas
Parcel records: 14,336,268 parcels in 254 counties. Published by Texas Geographic Information Office (TxGIO) / county appraisal districts (CC0-1.0); StratMap 2025 Land Parcels (county acquisitions through mid-2025; 253 of 254 counties, Donley missing), refreshed semiannual.
Share of parcels with each column filled: owner name 97%, site address 91%, total value 80%, land use 69%, year built 34%. Not published here: sale date, zoning.
Sample values in Texas
What our API returned at the Census Bureau's interior point of Texas'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 | Brewster County | Pecos County | Hudspeth County |
|---|---|---|---|
| Hazards | |||
| Inside a mapped floodplain | No | No | No |
| Wildfire, annual frequency | 0.0067 events a year | 0.00073 events a year | 0.00057 events a year |
| Tornado, annual frequency | 0.42 events a year | 0.69 events a year | 0.15 events a year |
| Hail, annual frequency | 0.76 events a year | 1.9 events a year | 0.38 events a year |
| Current drought category | D0 | no data | no data |
| On a mapped wetland | No | No | No |
| Nearest mapped wetland | 281 m | no data | 276 m |
| Land | |||
| Elevation | 940 m (3,084 ft) | 929 m (3,049 ft) | 1,369 m (4,492 ft) |
| Slope | 2.0° | 0.6° | 4.0° |
| Soil drainage | Well drained | Well drained | Well drained |
| Soil hydrologic group | D | B | D |
| Farmland class | Prime | Prime | Prime |
| Land use | Other | Other | Other |
| Crop or cover (CDL) | Shrubland | Shrubland | Shrubland |
| Tree canopy | 0% | 0% | 0% |
| On protected land (PAD-US) | No | No | No |
| Surface manager | Private or unknown | Private or unknown | Private or unknown |
| Climate & energy | |||
| Annual precipitation (normal) | 296 mm (12 in) | 347 mm (14 in) | 262 mm (10 in) |
| Days above 32 °C a year | 141 days | 117 days | 89 days |
| Solar resource (GHI) | 5.92 kWh/m²/day | no data | 5.98 kWh/m²/day |
| Mean wind speed at 100 m | 5.2 m/s | 8.1 m/s | 6.5 m/s |
| Wind capacity factor | 19% | 44% | 27% |
| Infrastructure | |||
| Nearest substation (69 kV+) | 16.9 km (10.5 mi) | 7.9 km (4.9 mi) | 30.4 km (18.9 mi) |
| Nearest gas pipeline | 74.8 km (46.5 mi) | 3.5 km (2.2 mi) | 20.9 km (13.0 mi) |
| Electric utility | RIO GRANDE ELECTRIC COOP, INC | SOUTHWEST TEXAS ELEC COOP, INC | EL PASO ELECTRIC CO |
| In a public water service area | No | No | No |
| Depth to water, nearest monitored well | no data | 121.9 m (400 ft) | no data |
| Nearest major road | 4.0 km (2.5 mi) | 5.5 km (3.4 mi) | 2.7 km (1.7 mi) |
| Community | |||
| Nearest fire station | no data | 21.4 km (13.3 mi) | no data |
| Nearest hospital | no data | 21.4 km (13.3 mi) | no data |
| Nearest school | 20.5 km (12.7 mi) | 19.7 km (12.2 mi) | no data |
| In an Opportunity Zone | No | No | No |
County pages
- Brewster County 6,184 sq mi of land
- Pecos County 4,764 sq mi of land
- Hudspeth County 4,570 sq mi of land
Datasets that returned data at these points
| source | fields |
|---|---|
BLM_SMA Bureau of Land Management | surface_management_agency |
EIA_ATLAS U.S. Energy Information Administration | nearest_gas_pipeline_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 | within_floodplain_polygon |
FEMA_NRI Federal Emergency Management Agency | hail_annual_frequency, tornado_annual_frequency, wildfire_annual_frequency |
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 |
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 Texas
- Land buyers: screen a lot for flood zone, wetlands, slope, soils, road and water access before a site visit; search Texas 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": 29.808997, "lng": -103.252458, "preset": "site_selection"}'
Or ask your assistant: “Using Isopleth, what are the flood zone, slope and soil drainage at 29.8090, -103.2525?”
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