This layer is used in the old 2014 Galveston Bay Oil Spill app.
Houston and Harris County publish a huge amount of open data, scattered across dozens of portals nobody tracks. This catalog lists every dataset we've found in one place, whether or not it's loaded into the explorer. Know a source we're missing? Add it, and it's shared with everyone.
| Source | What it is | Items | Loaded |
|---|---|---|---|
| Harris County ArcGIS Online services.arcgis.com |
One organization shared by county departments, precincts and staff. Mixes authoritative layers (fire stations, parks, crashes) with many working copies and one-off maps; review before use. | 3,112 | 16 |
| Rice University ArcGIS Online services.arcgis.com |
Research and class projects. Houston gems (HCFCD buyout lots, draft 2026 FEMA flood map, historical census, redlining) among worldwide student work. Research copies of agency data need permission before reuse. | 2,888 | 0 |
| Houston Advanced Research Center (HARC) ArcGIS Online services2.arcgis.com |
Environmental and regional research layers; source of the 2021 city cool-center list. | 528 | 1 |
| City of Houston GIS (ArcGIS Hubs) geohub.houstontx.gov |
Two Hub sites (Public Works geohub, citywide mycity) over several ArcGIS servers. Official. | 314 | 119 |
| Harris County Flood Control District ArcGIS Online services2.arcgis.com |
High-water marks, floodplains, projects, acreage by program. Source of the storm HWM layers. | 265 | 4 |
| City of Houston Open Data (data.houstontx.gov) data.houstontx.gov |
Separate from the GIS hubs. Mostly spreadsheets; finance (checkbook, payroll, budget) and census stay current, much else frozen since a 2023 migration. | 94 | 0 |
| U.S. Census Bureau api.census.gov |
4 | 3 | |
| FEMA (OpenFEMA and National Flood Hazard Layer) www.fema.gov |
4 | 3 | |
| U.S. Environmental Protection Agency data.epa.gov |
2 | 2 | |
| Centers for Disease Control and Prevention data.cdc.gov |
2 | 2 | |
| Texas Commission on Environmental Quality www.tceq.texas.gov |
2 | 1 | |
| Texas Water Development Board www.twdb.texas.gov |
1 | 1 | |
| U.S. Geological Survey water data waterservices.usgs.gov |
1 | 0 | |
| City of Houston 311 public data extracts www.houstontx.gov |
1 | 1 | |
| METRO (Harris County transit) www.ridemetro.org |
1 | 0 | |
| Stanford Open Policing Project openpolicing.stanford.edu |
1 | 0 | |
| TxDOT Crash Records Information System (CRIS) cris.dot.state.tx.us |
1 | 0 |
505 matches (likely staff working copies and non-Houston research layers hidden)
This layer is used in the old 2014 Galveston Bay Oil Spill app.
Galveston Bay Report Card study area outline.
Update grades of nitrogen, phosphorus, dissolved Oxygen, and bacteria Galveston Bay Report Card 2021. Also include wetlands area and developed area in 2016.
Galveston Bay Report Card watershed outline.
Galveston Bay Report Card What You Can Do tool dataset.
Galveston Bay Report Card What You Can Do tool dataset.
Feature layer generated from running the Find by Attributes and Location analysis tool.
eBird trends data. Each 27km x 27km region is represented by a circle polygon scaled by the relative abundance. For more info, please check https://science.ebird.org/en/status-and-trends/faq
This data includes three riparian corridors areas for the Headwaters to Baywaters project. They are100 years floodplain, 500 years floodplain and the outside 100 meters buffter of floodplain (100 year and 500 year combined).
TCEQ segments for streams/linear features and statistics based on 300 meters buffer.
Hydrogen Hub Funding project study area.
The exclusion zones of HARC building.
HARC parcel, building, and parking lot.
The locations of HARC building vegetation survey.
Polygons used for cartographic masks.
Locations of interest used by HARC for web mapping.
Official Commissioner's Precinct Boundaries.
Central Air Conditioning percentage by Census tract for Harris County, Texas.
The data from the HCAD Real & Personal Property Database. It is for the specific zip codes in Houston area
HCFCD ROW dataset join with FUT CTA Heat and tree tracking data.
Additional analysis on the CAPA heat data with the For Us tree study area by Census tract.
Summarized the CAPA temperature mean, max, and min values in Houston and Harris 2020 Campaign areas.
CAPA humidity traverse points afternoon in Houston and Harris County Campaign areas.
CAPA humidity traverse points morning in Houston and Harris County Campaign areas.
CAPA humidity traverse points evening in Houston and Harris County Campaign areas.
CAPA temperature traverse points afternoon in Houston and Harris County Campaign areas.
CAPA temperature traverse points morning in Houston and Harris County Campaign areas.
CAPA temperature traverse points evening in Houston and Harris County Campaign areas.
CAPA traverse points afternoon in Houston and Harris County Campaign areas.
CAPA traverse points afternoon in Houston and Harris County Campaign areas. Clipped with For Us Tree DACs.
CAPA traverse points morning in Houston and Harris County Campaign areas.
CAPA traverse points morning in Houston and Harris County Campaign areas.
CAPA traverse points evening in Houston and Harris County Campaign areas.
CAPA traverse points evening in Houston and Harris County Campaign areas. Clipped with For Us Tree DACs.
This map shows the redline areas that have the CAPA temperature raster coverage. Summarized the CAPA temperature mean, max, and min values in Houston Redline areas.
Summarized the CAPA temperature mean, max, and min values in Houston and Harris 2020 Campaign areas.
It's used for water-resource management and planning activities.
Eco Types for the 8-county H-GAC region. The data is circa 2008.
2019 trash bash data from H-GAC.
Estimated subsidence in feet from 1906-2016 using measured land surface elevation change at benchmarks surveyed in 2000 and estimated annual subsidence rates from 2011-2016 at HGSD GPS subsidence network assuming a constant rate of subsidence from 2010-2016.
Subsidence GPS Monitors from HGSD.
This feature class/shapefile is for the Homeland Infrastructure Foundation Level Database (HIFLD) https://gii.dhs.gov/HIFLD as well as the Energy modelling and simulation community.Data source:Oak Ridge National Laboratory (ORNL) Data and details are hosted by HIFLD as received f…
The National Bridge Inventory (NBI) is a collection of information (database) describing the more than 615,000 of the Nation's bridges located on public roads...
This feature class/shapefile is for the Homeland Infrastructure Foundation Level Database (HIFLD) and the Energy modelling and simulation community.
This feature class us for the Homeland Infrastructure Foundation Level Database and the Energy modelling and simulation community.
It represents natural gas transmission hubs in the continguous U.S. These data originate from the U.S. Energy Information Administrartion.
It represents natural gas transmission hubs in the continguous U.S. These data originate from the U.S. Energy Information Administration.
Found Houston or Harris County open data we don't list? A portal, a map service, a spreadsheet on an agency page, a research dataset? Tell us where it is. Reviewed suggestions are added to the catalog for everyone.