Data Sources & Methodology

How TexasParcels Builds Parcel Intelligence

TexasParcels combines parcel records, market data, public GIS datasets, mapping sources, and spatial analysis to create a standardized view of Texas land.

Our goal is to make property characteristics easier to review, compare, and understand — while clearly distinguishing source data from information calculated or analyzed by TexasParcels.

Data Sources

TexasParcels uses a combination of authoritative public, commercial, and permitted data sources. Source availability and coverage vary by property and location.

Parcel Data

  • Parcels

    Texas County Appraisal Districts (TxGIO StratMap)

    Texas county appraisal districts, compiled through TxGIO StratMap Land Parcels. Tax years 2022–2024.

Market Data

  • Property Records

    Derived Market Sources

    Derived Market Sources.

Water & Environment

  • Flood Zones

    FEMA

    Federal Emergency Management Agency (FEMA).

  • Wetlands

    U.S. Fish & Wildlife Service

    U.S. Fish & Wildlife Service — National Wetlands Inventory.

  • Wells

    Texas Water Development Board

    Texas Water Development Board driller reports.

  • Water Bodies & Contours

    USGS

    U.S. Geological Survey (USGS).

  • Federal & Protected Land

    PAD-US

    Protected Areas Database of the United States (PAD-US).

  • State Parks

    Texas Parks and Wildlife

    Texas Parks and Wildlife Department.

Infrastructure & Boundaries

  • Transmission Lines

    HIFLD

    Homeland Infrastructure Foundation-Level Data (HIFLD).

  • Pipelines

    Railroad Commission of Texas

    Railroad Commission of Texas.

  • Counties & City Limits

    TxDOT

    Texas Department of Transportation (TxDOT).

  • Roads

    OpenStreetMap

    OpenStreetMap.

Buildings

  • Building Footprints

    Microsoft

    Microsoft Building Footprints.

Mapping & Imagery

  • Maps, Search & Imagery

    Mapbox

    Mapbox.

Our Methodology

  1. 01

    Source Collection

    TexasParcels collects applicable parcel, market, environmental, infrastructure, terrain, boundary, building, and mapping data from authoritative public, commercial, and permitted sources.

    Each source may have its own geographic coverage, data structure, update schedule, and level of detail.

  2. 02

    Standardization

    Source datasets can use different formats, coordinate systems, naming conventions, measurements, and update schedules.

    TexasParcels organizes applicable source data into a consistent parcel-level framework so property characteristics can be reviewed more consistently across properties.

  3. 03

    Parcel Matching & GIS Analysis

    TexasParcels spatially analyzes parcel boundaries against relevant geographic datasets.

    Depending on the property and available coverage, analysis may include:

    • Road access and frontage
    • Flood zones
    • Creeks, rivers, ponds, and other water features
    • Wetlands
    • Elevation and terrain
    • Vegetation
    • Wells
    • Pipelines and transmission lines
    • Buildings
    • City and county boundaries
    • Federal and protected land
    • State parks
  4. 04

    Data Freshness & Coverage

    Each data provider maintains its own update schedule.

    TexasParcels processes and refreshes parcel intelligence as updated source data becomes available. The Last Updated date represents when the parcel presentation was most recently processed or refreshed. It does not necessarily mean that every underlying source was updated on that date.

    Data availability also varies by property and location. Not every dataset contributes information to every parcel.

    Data Status

    Present

    Available source data indicates that the feature exists.

    Absent

    Sufficient source information is not currently available for the property or location.

Source Data vs. TexasParcels Analysis

Some information shown on TexasParcels comes directly from source datasets, while other information is calculated through parcel-level analysis.

  • FEMA flood-zone geometry

    Approximate percentage of parcel within flood zones

  • Road geometry

    Calculated road frontage

  • USGS elevation data

    Elevation change across parcel

  • Wetland boundaries

    Approximate wetland acreage

  • Building footprints

    Structure detection

  • Infrastructure geometry

    Approximate proximity to infrastructure

This distinction helps users understand what comes directly from a data provider and what has been calculated or interpreted by TexasParcels.

Verification & Limitations

TexasParcels provides parcel and GIS intelligence to support property research, comparison, and marketing.

It does not replace professional due diligence, including:

  • Boundary surveys
  • Title research
  • Flood determinations
  • Environmental assessments
  • Engineering reports
  • Utility verification
  • Zoning confirmation

Users should independently verify information that is material to a real estate transaction.

TexasParcels may use data from:

TxGIO · County Appraisal Districts · FEMA · U.S. Fish & Wildlife Service · Texas Water Development Board · USGS · HIFLD · Railroad Commission of Texas · TxDOT · PAD-US · Texas Parks and Wildlife · Microsoft · OpenStreetMap · Mapbox

Source availability, coverage, and update frequency vary by dataset and location.