Worth adding
Draft 2026 FEMA flood map, Harris County (MAAPnext)
Draft 2026 FEMA flood map for Harris County (HCFCD MAAPnext modeling)
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 |
200 matches (likely staff working copies and non-Houston research layers hidden)
Draft 2026 FEMA flood map for Harris County (HCFCD MAAPnext modeling)
HCFCD buyout lots (4,554; 2,999 FEMA-funded), received by Rice from HCFCD Mar 2026
HCFCD acquired buyout lots, received from Carolyn White on 3/12/26. From Carolyn: "Please NOTE: The areas where there are large groupings of buyout lots are likely slated to be excavated for regional detention basins and would therefore not be suitable for small-scale, neighbor…
1930s HOLC redlining map of Houston
Redlining polygon
Research copy of HFD incidents; ask Rice/HFD before use
Research copy of 2.46M HFD incidents; ask Rice/HFD before use
Research copy of 2.46M HFD incidents; ask Rice/HFD before use
Research copy of 2.46M HFD incidents; ask Rice/HFD before use
All data points cleaned for filtering accordng to a user's preferences
Rice graduate students whose residence does not have recycling
Rice graduate students whose residence has recycling
Rice graduate student housing
Rice graduate student housing with laundry in-unit
Rice graduate student housing without laundry in-unit
Rice graduate student housing without recycling
Rice graduate student housing with recycling
Rice graduate student housing
Rice graduate student housing with laundry in-unit
Rice graduate student housing without laundry in-unit
Rice graduate student housing without recycling
Rice graduate student housing with recycling
Addresses Edward 1854 Dean Persons In Motion
This layer presents the 2020 U.S. Census Tract boundaries of the United States in the 50 states and the District of Columbia. It includes 2020 U.S. Census codes and population information. Tracts are polygons containing population totals from the 2020 Census and Esri Updated Demo…
CES and parks of interest in OST/South Union neighborhood.
Buffalo and Brays Bayou
Feature layer generated from running the Find by Attributes and Location analysis tool.
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.