Strategic Mapping Program (StratMap)
State-Wide Digital Map DataThe Strategic Mapping Program was established in 1997 as a cost-saving measure to produce, maintain and enhance statewide digital geographic data layers. StratMap Program Purpose:
- Establish and maintain a common base map for the State of Texas.
- Combine funding from state and federal sources to lower costs and avoid duplication.
- Continuously improve the quality and accuracy of data.
- Develop data using national and international standards to ensure compatibility.
WHAT IS AN ORTHOIMAGE?An Orthoimage is a digital aerial photograph with the same accuracy and characteristics of a map. Orthoimagery is created by using sophisticated computer software combined with other data sources to remove image distortion caused by camera tilt, optical lens anomalies and topography features. Distances, bearings, and area calculations can all be measured on Orthoimagery.
TEXAS ORTHOIMAGERY PROGRAM (TOP)The National Agriculture Imagery Program (NAIP) acquires imagery during the agricultural growing seasons (spring and summer months for leaf-on coverage) in the continental U.S. A primary goal of the NAIP program is to provide digital ortho photography to the public within a year of acquisition. Each image typically covers about 1/4 of a USGS Quadrangle. These images are generally referred to as Digital Orthophoto Quarter Quads (DOQQ’s)
AVAILABLE ORTHOIMAGERY FORMATS
- 1995 DOQ's (CIR) - 1 meter pixels – MrSID Format
- 2004 NAIP (CIR) - 1 meter pixels - MrSID Format
- 2005 NAIP (Natural Color) - 2 meter pixels - MrSID Format
- 2006 NAIP (CIR) - 2 meter pixels - MrSID Format
- 2008 - 2009 NAIP (Natural Color and CIR) – 1/2 meter pixels – jpeg2000 (JP2) Format
- 2010 NAIP (Natural Color) – 1 meter pixels – jpeg2000 (JP2) format
ADDITIONAL RESOURCES* CURRENT ORTHOIMAGERY STATEMENT OF WORK (SOW) FOR TEXAS Farm Services Agency: http://www.fsa.usda.gov/FSA/apfoapp?area=home&subject=prog&topic=nai
Coastal OrthoimagePort Aransas, Texas Near Port Aransas, Texas
County OrthoimageCollin County, fastest growing county in Texas
Panhandle OrthoimageCenter pivot irrigation in Texas
What is Lidar?Light Detection and Ranging (Lidar) is a technology that utilizes lasers to measure the distance from an airborne sensor (such as an airplane) to points on the ground. This creates an accurate 3-dimensional representation of the earth’s surface. Lidar goes beyond traditional bare earth digital elevation models (DEMs) by producing point cloud information that can be classified into existing features such as vegetation and man-made structures (See Examples below).
LIDAR ELEVATION FOR TEXAS
Various forms of elevation data exist for Texas. Forms of these data include digital contour lines (hypsography), digital elevation models, and the latest elevation technology that involves airborne sensor technology and is known as Light Detection And Ranging (Lidar). This technology uses a laser and sensor to transmit and receive pulses reflected from surfaces. These return pulses form a point cloud which represents elevation heights of features such as vegetation, buildings, and bare earth (ground).
Available LiDAR data for Texas.
AVAILABLE Lidar FORMATSLidar products generally include:
- LAS file (includes x, y, return, intensity, elevation parameters)
- Intensity Images
- DEM bare earth elevations
- Hydro-enforced breaklines and metadata
To order LiDAR data, click the button below:Order Data
|Comal, Guadalupe||FEMA||Download Report|
|Montague, Cooke, Grayson, Wise||TNRIS||Download Report|
|Burnet, Bell, McLennan||TNRIS||Download Report||Newton, Sabine, Shelby||TNRIS||Download Report|
|Austin, Waller||TNRIS||Download Report|
|Lee, Milam||TNRIS||Download Report|
|Grand Prairie||Grand Prairie||Download Report|
|Aransas, Refugio||FEMA||Download Report|
|Brazoria (revised)/td>||FEMA||Download Report|
|Calhoun (revised)||FEMA||Download Report|
|Chamber (revised)||FEMA||Download Report|
|Jackson (revised)||FEMA||Download Report|
|Jefferson (revised)||FEMA||Download Report|
|San Patricio||FEMA||Download Report|
- Wikipedia: http://en.wikipedia.org/wiki/LIDAR
- USGS: http://lidar.cr.usgs.gov/
- Lidar Links Portal: http://www.lidarbasemaps.org/
Six Flags Over Texas, ArlingtonLidar point cloud colorized by elevation and intensity image
The Ballpark in ArlingtonLidar point cloud colorized by NAIP 2010 Orthoimagery
Dallas, adjacent to Trinity RiverLidar point cloud colorized by elevation and intensity image
Cotton Bowl, DallasLidar point cloud colorized by elevation and intensity image
Gibbons Creek Reservoir Dam, Grimes CountyLiDAR point cloud colorized by elevation and intensity image
Gibbons Creek Reservoir, Grimes CountyLidar point cloud classified by vegetation, ground and water
WHAT IS NHD?The National Hydrography Dataset (NHD) is a comprehensive set of digital spatial data that encodes information about naturally occurring and constructed bodies of water, paths through which water flows, and related entities. The information encoded about these features includes classification and other characteristics, delineation, geographic name, position and related measures, a "reach code" through which other information can be related to the NHD, and the direction of water flow. In addition to this geographic information, the dataset contains metadata and information that supports the exchange of future updates and improvements to the data. The NHD is based upon the content of USGS Digital Line Graph (DLG) hydrography data integrated with reach-related information from the EPA Reach File Version 3 (RF3) and serves as the surface water representation in The National Map. Documentation on the history of the original collection as well as the technical specifications for the NHD are provided here:
ADDITIONAL USES FOR NHDThe NHD data support many applications, such as:
- Map Making. Positional and descriptive data embedded in the NHD provides the ability to selectively identify and display features used in the map making process.
- Geocoding Observations. Much like street addresses provide a way to link data to a road network, the NHD's "reach code" provides the means to link data to water features.
- Flow Modeling. Information about the direction of flow, when combined with other data, can help users model basin characteristics used in application such as flood prediction and control.
AVAILABLE FOR DOWNLOADThe NHD data are downloadable for use and maintenance. An introduction to the functionality and access to the data can be found at http://nhd.usgs.gov/data.html.
Red River, NHD stream feature before edit process
NHD streams & lakes, WBD watersheds and NAIP 2010 Orthoimagery
WHAT IS TRANSPORTATION?The statewide transportation dataset is a publicly available digital data layer which serves as a cartographic product for seamless base map production. The layer is fully attributed to provide the ability to selectively identify and display specific road classes used in the map making process.
AVAILABLE FORMATThe transportation database is a vector base file and is available for download.
ADDITIONAL RESOURCESWith the Transportation dataset, many new features have been added or restructured. TNRIS has developed a short tutorial on how to best utilize the revised dataset symbology.
WHAT ARE THE BOUNDARIES DATA?The StratMap boundaries delineate county, city, parks, and landmarks such as airports, universities, wildlife refuges, and military bases. They are derived from various sources such as Texas Department of Transportation, Texas Parks and Wildlife, and local jurisdictions. StratMap boundaries are primarily used for cartographic display but are also useful in preliminary right-of-way determination, highway planning and maintenance, real estate, public services, jurisdiction maintenance, and other administrative assessments.
The transportation layers are available for download in shapefile format.
Big Bend National Park and Black Gap WMA, Brewster County
Lyndon B. Johnson National Grasslands, Wise County
Wise and Denton County
Austin Metro Area, Travis County
WHAT IS THE SOIL SURVEY GEOGRAPHIC DATASET (SSURGO)?
The SSURGO dataset is an updated digital version of the county soil surveys. SSURGO uses recent digital orthophotos and field work to update the original printed surveys.
StratMap and the Natural Resources Conservation Service (NRCS) joined forces to create the soil survey geographic database for Texas. This data set is a digital soil survey and is the most detailed level of soil geographic data developed by the National Cooperative Soil Survey.