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RISN Program Documentation

RISN subscribers can select a variety of tools to create a unique system that meets their own needs. The purpose of this page is to provide information for making decisions about which tools are appropriate.

Tools

RISN subscribers may choose to license the web services alone for their own development or pair them with one or more technical tools. The tools currently available for consideration are:

RISN subscribers may choose to license the web services alone for their own development or pair them with one or more technical tools. The tools currently available for consideration are:

General Description
High-resolution digital aerial photography.  Photographs are captured over multiple years and in both leaf-off and leaf-on conditions.

NCTCOG regional aerial photography is captured bi-annually through our cooperative aerial program.  Program is a cost-sharing initiative which allows member entities and other interested parties to share the cost of the overall flight. More information about this cooperative purchase program is available on NCTCOG’s Digital Aerial Photography website.

    2009 Aerial Photography:  6-inch resolution digital aerial photographs.  Complete coverage of Collin, Dallas, Denton, Rockwall & Tarrant counties.  Partial coverage of Ellis, Johnson, Kaufman and Parker counties.  Available through RISN to aerial cooperative participants only.

    2007 Aerial Photography: 6-inch resolution digital aerial photographs for all 16 counties in the NCTCOG region.  Available to all RISN participants.

  • Vendor Sanborn, Inc.
    Altitude of Capture 4,800' above mean terrain
    Focal Length 120 mm (4.72")
    Imagery Scale 1"= 1015’ (Photo scale 1:12190 )
    Capture Period February-March 2009; January-March 2007
    Conditions  Leaf off, cloud free, 30 degree to 20 degree sun angle
    Forward Overlap 60%
    Sidelap 25%
    Coordinate System Texas State Plane, North Central Zone
    Horizontal Datum NAD 83
    Units US Survey Feet

    • 2009 National Agricultural Imagery Program (NAIP) Aerial Photography: 1-meter resolution digital aerial photographs for all 16 counties.  NAIP photographs were flown by the U.S. Department of Agriculture (USDA) during the 2009 growing season.  Imagery from this ongoing program is typically available to government agencies within one year of acquisition. Available to all RISN participants.
    Facilitator USDA
    Imagery Type 4-band, Leaf-on
    Imagery Scale 1 meter
    Horizontal Accuracy 6 meters
    Capture Period Summer 2009
    Coordinate System Universal Trans Mercator
    Horizontal Datum NAD 83



    RISN Viewer (formerly known as iCommunities)

    General Description
    Web-based mapping interface similar to Google and Bing Maps. Online interface comes with six basic services (aerial photography, boundaries, decennial Census data, contours, hydrology and transportation). Online interface can use icons, color schemes, and graphics unique to the subscriber. Subscribers can perform simple queries and have the ability to print, export, and email maps and reports.


    Basic Query Functions

    General Description
    Ability to select a feature on the online interface and see underlying values


    Advanced Query Functions

    General Description
    On-demand custom reports based on under-defined polygons or user-specified radii

     

     

     

     

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     CONTACT US | SITE MAP | LEGAL | SYSTEM REQUIREMENTS
     North Central Texas Council of Governments | 616 Six Flags Drive P.O. Box 5888 Arlington, TX 76005-5888
     Main Operator: (817) 640-3300 | Fax: (817) 640-7806