Identification_Information: Citation: Citation_Information: Originator: Intermap Technologies Inc. Publication_Date: 20010111 Title: GLOBAL Terrain: "orripv1.tif" Edition: 1 Geospatial_Data_Presentation_Form: Orthorectified Radar Image Series_Information: Series_Name: GLOBAL Terrain Orthorectified Radar Image Issue_Identification: Version 1 Publication_Information: Publication_Place: Englewood, CO Publisher: Intermap Technologies Inc. Online_Linkage: Online_Linkage: Online_Linkage: Description: Abstract: This data set is an orthorectified radar image (ORRI) product that populates the GLOBAL Terrain product catalog. The ORRI products are generated using the Intermap STAR-3i airborne interferometric synthetic aperture radar (SAR) system mounted in a LearJet 36A aircraft. The GLOBAL Terrain ORRI data files are digital representations of the radar response signal. ORRIs consist of a georeferenced pixel for a number of ground positions at regularly spaced intervals. These digital data files are produced by Intermap Technologies Inc.(Intermap) as part of the GLOBAL Terrain product line and are licensed in 7.5-minute tiles for areas located between 0 and 56 degrees North/South. Data for locations above 56 degrees North/South are licensed in 15-minute by 7.5-minute tiles. GLOBAL Terrain ORRI products represent the first reflective surface as illuminated by the radar. Accuracy statements are based on areas of moderate terrain. Diminished accuracies are to be expected in areas of extreme terrain and dense vegetation. The ORRI data for 7.5-minute units correspond to the USGS 1:24,000 and 1:25,000 scale topographic quadrangle map series for available areas in the United States and throughout the world. Each 7.5-minute ORRI is based on 2.5m pixel resolution using the Universal Transverse Mercator (UTM) projection. Each 7.5- by 7.5-minute tile provides full coverage with overlap into adjacent tiles. The original ORRI is unenhanced and may appear dark when viewed. Both the original ORRI and an ORRI with a customized linear stretch enhancement are provided. The stretched ORRI will appear brighter and is easy to view without additional enhancements. Purpose: The purpose of this data set is to provide a source for current and accurate orthorectified radar images with a horizontal accuracy of 2.5 meters. Supplemental_Information: The STAR-3i system employs three principle technologies: X-band Horizontal -Horizontal (HH) polarized SAR, a ring laser-based inertial measurement unit (IMU), and Differential Global Positioning System (DGPS). STAR-3i was developed by the Environmental Research Institute of Michigan (ERIM) under contract to the U.S. Defense Advanced Research Projects Agency (DARPA). The system is comprised of two X-band radar antennae that collect data simultaneously. The set of acquired data are "interfered" by a digital correlation process to extract terrain height data and geometrically correct radar images. STAR-3i uses post-processed DGPS data, together with precise inertial measurement data, to attain highly accurate positioning control. Precise terrain height and positioning data are enhanced by careful calibration of the baseline separating the two antennae. The STAR-3i system accuracy has been independently validated by tests conducted by the U.S. Army Topographic Engineering Center, the Institute of Navigation, Stuttgart University and by NASA. A summary of test results are accessible at . The GLOBAL Terrain folder name describes the geographic location of a tile. The GLOBAL Terrain file name encapsulates the GT processing level and the product version number. A complete explanation of the GLOBAL Terrain file name can be found in the GLOBAL Terrain Product Handbook. . Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20001005 Ending_Date: 20001005 Currentness_Reference: The above dates refer to the time of field data acquisition and therefore reflect ground conditions at that time. Status: Progress: Complete Maintenance_and_Update_Frequency: Ongoing Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -148.500 East_Bounding_Coordinate: -148.250 North_Bounding_Coordinate: 69.750 South_Bounding_Coordinate: 69.625 Keywords: Theme: Theme_Keyword_Thesaurus: MEL_Scientific-Engineering_Field_Thesaurus Theme_Keyword: Elevation Theme_Keyword: Cartography Theme_Keyword: Geodesy Theme_Keyword: Geography Theme_Keyword: Hypsography Theme_Keyword: Mapping Theme_Keyword: Photogrammetry Theme_Keyword: Stereophotogrammetry Theme_Keyword: Topography Theme_Keyword: Radar Theme_Keyword: Interferometric Theme_Keyword: Remote Theme_Keyword: Sensing Theme_Keyword: SAR Theme_Keyword: DEM Theme_Keyword: DTM Theme_Keyword: DSM Theme_Keyword: ORRI Theme_Keyword: ORI Theme_Keyword: STAR-3i Theme_Keyword: INSAR Theme_Keyword: IFSAR Theme_Keyword: IFSARE Theme_Keyword: GEOSAR Theme_Keyword: height Stratum: Stratum_Keyword_Thesaurus: MEL_Environmental_Domain_Thesaurus Stratum_Keyword: Terrain Stratum_Keyword: Earth Stratum_Keyword: Surface Stratum_Keyword: Bald Stratum_Keyword: Ground Stratum_Keyword: First Place: Place_Keyword_Thesaurus: None Place_Keyword: USA Place_Keyword: Alaska Place_Keyword: Lower Place_Keyword: Kuparuk Place_Keyword: Watershed Temporal: Temporal_Keyword_Thesaurus: None Temporal_Keyword: 2000 Temporal_Keyword: October Access_Constraints: Purchase Use_Constraints: License Agreement Point_of_Contact: Contact_Information: Contact_Position: Vice-President E-Business Contact_Organization_Primary: Contact_Organization: Intermap Technologies Inc. Contact_Address: Address_Type: mailing address Address: 9785 South Maroon Circle, Suite 150 City: Englewood State_or_Province: CO Postal_Code: 80112-5928 Country: USA Contact_Voice_Telephone: (303) 708-0955 Contact_Facsimile_Telephone: (303) 708-0952 Contact_Electronic_Mail_Address: mailto:info@globalterrain.com Browse_Graphic: Browse_Graphic_File_Name: Browse_Graphic_File_Description: Thumbnail of ORRI in greyscale Browse_Graphic_File_Type: 8 bit jpeg Data_Set_Credit: This data was produced by the Airborne Operations group and the GT Products group at Intermap Technologies Inc. Security_Information: Security_Classification_System: GLOBAL Terrain End User's License Agreement (GTEULA) Security_Classification: License Agreement. Security_Handling_Description: The user agrees to read and abide by the License Agreement. Copyright Intermap Technologies Inc., 1997-2001. All rights reserved. Refer to the license document on the website. . Native_Data_Set_Environment: This data is delivered on interoperable media with metadata, thumbnail images and quality control report. The data set was developed on a Sun ULTRA SPARC 2 computer system running Solaris (UNIX). Cross_Reference: Citation_Information: Originator: Intermap Technologies Inc. Publication_Date: 20010111 Title: GLOBAL Terrain: "dsm3thnv1.jpg" Edition: 1 Geospatial_Data_Presentation_Form: Digital Elevation Model (DEM) Series_Information: Series_Name: GLOBAL Terrain Digital Surface Models (DSMs) Issue_Identification: Version 1 Online_Linkage: Online_Linkage: Online_Linkage: Online_Linkage: Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Calculation of the orthorectified radar image is described in the GT Product Handbook User's Guide. Logical_Consistency_Report: contains a final Quality Control report. Completeness_Report: Coverage maps are provided for each area of acquisition. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: All data products are 2.5 meters RMSE or better in horizontal accuracy. For details, see . Lineage: Process_Step: Process_Date: 20010111 Process_Description: This GLOBAL Terrain ORRI data product was derived using Intermap Technologies STAR-3i airborne interferometric SAR data acquisition system. The flying height is 30,000 feet Above Mean Ground. The primary look direction is West. The secondary (alternate) look direction is None. The phase unwrapper utilized is Goldstein. Most incidences of non-data areas are due to radar shadow and layover due to steep terrain. Radar shadow is a factor of the local topography. It is often found in mountainous regions and the urban canyons of built-up areas. Occurances of non-data areas within an ORRI are dependent on the look direction of the radar. Areas in which no data is collected are assigned the value 255. Null data such as shadows within an image are assigned the value 0. Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Pixel Row_Count: 5972 Column_Count: 6800 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 6 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9996 Longitude_of_Central_Meridian: 147 degrees West Latitude_of_Projection_Origin: 0 False_Easting: 500000.0 meters False_Northing: 0.0 meters Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 2.5 Ordinate_Resolution: 2.5 Planar_Distance_Units: Meters Geodetic_Model: Horizontal_Datum_Name: WGS84 Ellipsoid_Name: WGS84 Semi-major_Axis: 6378206.4 Denominator_of_Flattening_Ratio: 294.98 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: 8 bit GeoTIFF Entity_Type_Definition: The ORRI is an 8 bit georeferenced TIFF image on a 7.5-minute geographic (lat/long) grid in UTM projection. The origin of the pixel is center center. Entity_Type_Definition_Source: Attribute: Attribute_Label: Digital number value per pixel. Attribute_Definition: Greyscale value assigned to pixel to represent magnitude of radar signal return. Attribute_Definition_Source: Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 255 Attribute_Units_of_Measure: digital number values Attribute_Measurement_Resolution: 1 Overview_Description: Entity_and_Attribute_Overview: >Project Information >Project Area: Lower Kuparuk Watershed Alaska >Intermap Project Number: 00241_310 >Mission # (s): 310 >Intermap Processing AML Version: 1.0.3, 20010228 >ISO 9001 Certification No.: A8379 >UTM_Easting_(meters): Min. 438210 Max. 455207.5 >UTM_Northing_(meters): Min. 7724162.5 Max. 7739090 Entity_and_Attribute_Detail_Citation: Metadata_Reference_Information: Metadata_Date: 20010409 Metadata_Contact: Contact_Information: Contact_Position: Vice-President E-Business Contact_Organization_Primary: Contact_Organization: Intermap Technologies Inc. Contact_Address: Address_Type: mailing address Address: 9785 South Maroon Circle, Suite 150 City: Englewood State_or_Province: CO Postal_Code: 80112-5928 Country: USA Contact_Voice_Telephone: (303) 708-0955 Contact_Facsimile_Telephone: (303) 708-0952 Contact_Electronic_Mail_Address: mailto:info@globalterrain.com Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998