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Trinity River COMMON VISION Program

General Data Specifications
Trinity River Corridor Engineering Mapping

The following information provides an overview of key details of the Trinity River Data Set.

DATABASE AREA:

240 Square Miles of the Trinity River Corridor, including:

  1. The Trinity Clear Fork from Benbrook Lake north to the Trinity West Fork Confluence.
  2. The Trinity West Fork from Eagle Mountain Lake east to the confluence of the Trinity Elm fork and Trinity Mainstem in Irving.
  3. The Trinity Elm Fork from Lewisville Lake south to the Confluence of the Trinity West Fork and Trinity Mainstem.
  4. The Trinity Mainstem from the confluence of the Trinity Elm Fork and Trinity West Fork south to near Pleasant Run Road East in Dallas County.
AERIAL PHOTOGRAPHY: 1 Inch = 800 Feet, Flown February 22 and 23, 1991
PHOTOGRAMMETRIC CONTROL: 563 Panels: 318 for Vertical Control, 245 for both
Horizontal and Vertical Control
SURVEY CONTROL: 18 Pairs Permanent Monuments established by GPS Method
for Trinity Engineering Mapping Project
307 Existing Monuments: 1st, 2nd, and 3rd Order
COORDINATE SYSTEM: Horizontal Control Based on NAD 83 State Plane
Coordinate System.
Vertical Control Based on National Geodetic Vertical
Datum of 1929.
MAPPING ACCURACY: National Map Accuracy Standards
DIGITAL DATA COMPILATION: Stereo Compilation
PLOTTING SCALE: 1 Inch = 200 Feet
HORIZONTAL ACCURACY: (+/-) 4 Feet
VERTICAL ACCURACY: (+/-) 1 Foot
CONTOUR INTERVAL: 2 Feet
DIGITIZED CROSS SECTIONS: 946 at an Average Length of 9,000 Feet.

 

 
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