Geospatial data about Houston, Texas 100 year flood plain (Harris County). Export to CAD, GIS, PDF, CSV and access via API.

This layer is sourced from mycity.houstontx.gov.

Vector polygon map data of city limits from Houston, Texas containing 731 features.

City limits GIS (Geographic Information System) data provides valuable information about the boundaries of a city, which is crucial for various planning and decision-making processes. Urban planners and government officials use this data to understand the extent of their jurisdiction and to make informed decisions regarding zoning, land use, and infrastructure development within the city limits.

By overlaying city limits GIS data with other layers such as population density, land parcels, and environmental features, planners can analyze spatial patterns and identify areas for growth, conservation, or redevelopment. This data also aids in emergency management by defining the areas of responsibility for different emergency services, helping to streamline response efforts during crises..

This city limits data is available for viewing and sharing as a map in a Koordinates map viewer. This data is also available for export to DWG for CAD, PDF, KML, CSV, and GIS data formats, including Shapefile, MapInfo, and Geodatabase.

This map showcases Emergency Service Districts (ESD) across Montgomery County, Texas, superimposed on a detailed street map that includes roads, railroads, rivers, lakes, and municipal boundaries. The ESD boundaries are essential for emergency service planning and operations within the county, providing crucial geographic context for public safety and emergency response efforts. Key features of the map include:Emergency Service Districts (ESD) (Montgomery Central Appraisal District - MCAD)Roads (Montgomery County Emergency Communications District)Railroads (Texas Department of Transportation - TxDOT)Rivers and Lakes (United States Geological Survey - USGS)Municipal Boundaries (Montgomery Central Appraisal District - MCAD)Sam Houston Trails and Paths (US Forest Service)This map is optimized for printing at Arch E size (36x48 inches) and is available in Adobe PDF format. Users may need Adobe Acrobat for viewing and printing.Update Frequency: AnnuallyAccess Requirements: Access to this map is open to the public and stakeholders interested in Montgomery County's transportation infrastructure and natural environment.

USE ASSESSMENT DATE: 20 MARCH 2025ATTRIBUTE IN "PLACEMAT" FIELD WITHIN THE FOLLOWING LAYERS:1.SWG Projects: https://usace-swg.maps.arcgis.com/home/item.html?id=6bd59d0933c240bdac363cb5aab481982. SWG Projects Per Congressional District: https://usace-swg.maps.arcgis.com/home/item.html?id=814d00b26b314e8185defe32ed757c2e3.CB - Projects Per District with Congressional Districts (JOIN_LAYER): https://usace-swg.maps.arcgis.com/home/item.html?id=087e415867a842a5bc72449b209cc105USED IN:1. SWG Congressional Book: https://usace-swg.maps.arcgis.com/home/item.html?id=688523bb06c849218dfbe76381dae3bb

CATEGORY: Infrastructure

This resource describes a dataset of gridded depth at horizontal resolution of 3 meters, published November 15, 2017, downloaded from FEMA [1] and hosted in this archive at the University of Texas Advanced Computing Center (TACC) [2].. The raster dataset is contained within an Esri ArcGIS geodatabase. This product utilized Triangulated Irregular Network (TIN) interpolation, four quality assurance measures (identifying dips, spikes, duplication, and inaccurate/unrealistic measurements). High Water Marks were obtained from the Harris County Flood Control District (HCFCD), US Geological Survey (USGS), and other inspection data. Elevation data comprised a mosaic of 3 meter resampled elevations from 1M & 3M LiDAR, and IFSAR data. One section of the IfSAR data was found to be erroneous, and replaced with a blended 10 meter section. [This description was in correspondence January 22, 2018, from Mark English, GeoSpatial Risk Analyst, FEMA Region VIII, Mitigation Division.]

A preliminary version of these depths dated September 10, 2017 can be viewed in a FEMA web map [3]. This web map shows a forecasted depth grid, based on National Weather Service (NWS) Advanced Hydrologic Prediction Service (AHPS) forecasted water levels.

See FEMA's Natural Hazard Risk Assessment Program (NHRAP) ftp site [4] for additional HWM-based depth grids and inundation polygons: - Harris County AOIs and Inundation Boundaries [5] - Harris County Depth Grids [6] - Aransas, Nueces, and San Patricio Coastal Depth Grids and Boundaries [7] FEMA notes on these Modeled Preliminary Observations: o Based on observed Water Levels at stream gauges interpolated along rivers, downsampled to 5m resolution DEM o Depth grids updated with new observed peak crest as they become available o Will include High Water Mark information as it becomes available o Extents validated with remote sensing o Use for determining damage levels on specific structures

See also FEMA's journal of mitigation planning and actions related to Harvey [8].

References and related links: [1] FEMA_Depths_3m_v3.zip (39 gb ftp download) [https://data.femadata.com/Region8/Mitigation/Data_Share/] [2] TACC 39gb wget or ftp download [https://web.corral.tacc.utexas.edu/nfiedata/Harvey/flood_data/FEMA_Harvey_Depths_3m.gdb.zip] [3] FEMA map viewer for Hurricane Harvey resources (flood depths is bottom selection in layers list) [https://fema.maps.arcgis.com/apps/webappviewer/index.html?id=50f21538c7bf4e08b9faab430bc237c9] [4] FEMA NHRAP ftp [https://data.femadata.com/FIMA/NHRAP/Harvey/] [5] [https://data.femadata.com/FIMA/NHRAP/Harvey/Harris_AOIandBoundaries.zip] [6] [https://data.femadata.com/FIMA/NHRAP/Harvey/Harris_Mosaic_dgft.zip] [7] [https://data.femadata.com/FIMA/NHRAP/Harvey/Rockport_DG_unclipped.zip] [8] Hurricane Harvey Mitigation Portfolio - FEMA map journal [https://fema.maps.arcgis.com/apps/MapJournal/index.html?appid=70204cf2762d45409553fd9642700b7f]

Link to the ScienceBase Item Summary page for the item described by this metadata record. Service Protocol: Link to the ScienceBase Item Summary page for the item described by this metadata record. Application Profile: Web Browser. Link Function: information

Particle size distributions measured using a custom scanning mobility analyzer (SMPS) and a TSI, Inc. aerodynamic particle sizer (APS). The size distributions measured with the two instruments were merged during data inversion to produce a single distribution spanning a diameter range from approximately 19 nanometers to 15 micrometers. Size-dependent cloud condensation nuclei (CCN) activity measured with a CCN counter operated in parallel to the condensation particle counter in the SMPS are reported separately. The measurements were made from the Baylor University/University of Houston Mobile Air Quality Laboratory (MAQL) between July 5 and August 30, 2022 during the TRACER-MAP project. The trailer moved between five sites in the Houston regions as follows: Aldine: 7/5-7/8, 7/21-7/26, 8/15-8/24 University of Houston: 7/8-7/16, 8/8-8/15 San Jacinto monument: 7/16-7/21 Jones State Forest: 7/26-8/1; 8/24-8/30 AMF site in La Porte: 8/1-8/8

This is the Corn Creek Project on the Houston Ranger District of the Mark Twain National Forest. These project plans are not finalized. This map has been created to share these project plans with the public. Public involvement through the scoping process is likely to take place sometime in 2023-2024. This map is designed to be a tool for use during the planning process. This interactive map displays planned activities. Zoom in and click on the items in the map to view the details.For further information on the Corn Creek Project contact Kayla Wiedau. kayla.wiedau@usda.gov

This layer depicts hurricane evacuation routes that originated from a hurricane evacuation map by the City of Houston Office of Emergency Management. Routes are stored as arcs. Last updated in March 2025.

This dataset was created by the Transportation Planning and Programming (TPP) Division of the Texas Department of Transportation (TxDOT) for planning and asset inventory purposes, as well as for visualization and general mapping. County boundaries were digitized by TxDOT using USGS quad maps, and converted to line features using the Feature to Line tool. This dataset depicts a generalized coastline.Update Frequency: As NeededSource: Texas General Land OfficeSecurity Level: PublicOwned by TxDOT: FalseRelated LinksData Dictionary PDF [Generated 2025/03/14]

This is the Corn Creek Project on the Houston Ranger District of the Mark Twain National Forest. These project plans are not finalized. This feature service is created to share these project plans with the public. Public involvement through the scoping process is likely to take place sometime in 2023-2024. Project plans may change after public involvement. This data is just a tool during the planning process and is not the final version of the corn creek project plans. This data will be used to create an interactive map to help inform the public of the Corn Creek Project.