COHGIS data is prepared and made available for general reference purposes only and should not be used, or relied upon for specific applications, without independent verification. The City of Houston neither represents, nor warrants COHGIS data accuracy, or completeness, nor will the City of Houston accept liability of any kind in conjunction with its use.
A geographic information system (GIS) is a combination of hardware, software, and data that enables analysis of the location and characteristics of geographic phenomena.
A short answer is “everyone”. GIS is used by many city departments because it provides decision makers with the tools necessary to answer complex geospatial questions. It integrates spatial and tabular information in a single consistent framework and it provides insight into patterns and spatial relationships within data that might not be obvious outside of a GIS.
ArcGIS is a collection of GIS software products that provide the necessary tools to capture, manage, analyze, and displaying geographically referenced information. For a more complete explanation, visit www.esri.com.
COHGIS stands for City of Houston Geographic Information System. COHGIS dataset is a common GIS dataset published by many departments/business units at the City of Houston.
PD - Mapping
State Plane, Texas South Central Zone 5401, FIPS 4204, NAD83
Most of COHGIS data are updated on an annual basis. Some datasets are updated as necessary. The date of last update is in the metadata associated with each dataset. The accuracy of the data depends on the source material that the data was collected from and how it was entered into the GIS.
No. Conversions, projections, consultation or support are not provided for general distribution data. The data is provided 'as is'.
Harris County Appraisal District is the data creator (and owner) of its parcel data. You can download HCAD parcel related data from HCAD’s public data website pdata.hcad.org
Inaccuracies regarding the GIS data can be reported to PD Addressing team.
PD - Addressing
No. City’s aerial imagery is not a public dataset. The City of Houston obtains the aerial imagery datasets through a cooperative purchasing program from Houston-Galveston Area Council, H-GAC. The license agreement does not allow the City to give it away. Please contact H-GAC for this data.
No. This building footprints data is not a public dataset. The City of Houston obtains the building footprints through HCAD from Pictometry International Corp. The license agreement does not allow the City to give it away. Please contact Pictometry for this data.
No. STARMAP is a licensed product from H-GAC. Please contact H-GAC for this data.
No. KEY MAP is a licensed product from Key Maps, Inc. Please contact Key Maps, Inc. for this data.
For the latest parcel data and attribute / corresponding tables, you need to go to the HCAD website (Harris County Appraisal District). We use their data from time to time, but we do not maintain it. Harris County is large and contains over 1.3 million parcels. To keep the size manageable they have the tables separate from the geometry download. You’ll need to get them both and join them up.
• GIS data: http://pdata.hcad.org/GIS/index.html
• Tables to join: http://pdata.hcad.org/download/index.html
• Documentation: http://pdata.hcad.org/Instructions.html
Because the COH does not maintain private companies datasets. You will need to report errors to those entities individually get them to change their data.
Outside of the City Limits there are many different addressing authorities, you can contact us and if we aren’t your addressing entity we can tell you who is.
Please use the City Service Info App.
Please use the City Service Info App.
We have many maps on our GIS web site for you to download. See our printable map catalog. If you cannot find the map you are looking for in our map catalog, please contact us at email@example.com. Let us know who you are, what map you are looking for, and why you need the map.
Because the underlying technology (Adobe Flash/Flex) used to build the previous online mapping system is no longer available or supported by ESRI, City's GIS software vendor.
The previous release of My City Map Viewer will be available to use until January 1, 2017.
Any pickup questions can be answered by a representative by calling 311, or the Solid Waste Department directly at 713.956.6589
311 handle most service questions, visit the 311 website.
Contact the Solid Waste Department directly at 713.956.6589
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