Identification_Information: Citation: Citation_Information: Originator: Intermap Technologies Inc. Publication_Date: 20191203 Title: n5745w15300P.tif Edition: 1 Geospatial_Data_Presentation_Form: Digital Elevation Model Series_Information: Series_Name: Digital Surface Models Issue_Identification: Core Product Version: 4.4.1, Edit Rule Version: Version: 4.5, AutoEdit Touch Up Rule Version: 1.0 Publication_Information: Publication_Place: Englewood, CO Publisher: Intermap Technologies Inc. Description: Abstract: Intermap's DEM products are 3D raster datasets with elevations captured at 5-meter postings or every 5 meters. They are generated using Intermap's STAR technology (Interferometric Synthetic Aperture Radar), which is mounted to an aircraft. The Digital Surface Model (DSM) products represent the first reflective surface illuminated by the radar. Accuracy statements are based on unobstructed areas of moderately sloped terrain. Diminished accuracies are to be expected in areas of extreme terrain and dense vegetation. The DSM is stored as a contiguous dataset spanning continental land masses where we have captured data. It is available in specific areas of interest or in 15-minute by 15-minute tile areas. For more detailed information, refer to Intermap's Product Handbook at https://www.intermap.com/hubfs/pdf/brochures/INTERMAP%20-%20Product%20Handbook.pdf. Purpose: The DSMs are used as a fundamental layer of information in 3D geospatial analysis and spatial information Decision Support Systems (DSS). Typical applications include 3D visualization and line-of-sight applications. In conjunction with the DTM, applications include transmission corridor planning, forestry analysis applications, biomass studies, and other related applications. A number of the priority layers of spatial information recognized by the National Spatial Data Infrastructure may be derived from Intermap Technologies' DEMs including elevation, shoreline delineation, hydrography, slope, and aspect layers. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20190629 Ending_Date: 20190702 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: -153.012993 East_Bounding_Coordinate: -152.735096 North_Bounding_Coordinate: 58.005370 South_Bounding_Coordinate: 57.744574 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: ORI Theme_Keyword: INSAR Theme_Keyword: IFSAR Theme_Keyword: IFSARE Theme_Keyword: GEOSAR Theme_Keyword: height Place: Place_Keyword_Thesaurus: None Place_Keyword: Alaska Place_Keyword: USA Stratum: Stratum_Keyword_Thesaurus: MEL_Environmental_Domain_Thesaurus Stratum_Keyword: Terrain Stratum_Keyword: Earth Stratum_Keyword: Surface Stratum_Keyword: Ground Stratum_Keyword: First Temporal: Temporal_Keyword_Thesaurus: 2019 Temporal_Keyword: July Access_Constraints: Purchase Use_Constraints: End User License Agreement Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Intermap Technologies Inc. Contact_Position: Data Archive Manager Contact_Address: Address_Type: mailing address Address: 8310 South Valley Highway, Suite 400 City: Englewood State_or_Province: CO Postal_Code: 80112-5847 Country: USA Contact_Voice_Telephone: (303) 708-0955 Contact_Facsimile_Telephone: (303) 708-0952 Contact_Electronic_Mail_Address: service@intermap.com Data_Set_Credit: This data was produced by Intermap Technologies Inc. Native_Data_Set_Environment: This data is delivered on interoperable media with metadata. The data set was developed on a Microsoft Windows system using Intermap's propriatory Interferometric Editing System (IES). Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Calculation of the digital elevation model is described in the Intermap Technologies Core Product Handbook User's Guide. https://www.intermap.com/hubfs/pdf/brochures/INTERMAP%20-%20Product%20Handbook.pdf Logical_Consistency_Report: None Completeness_Report: None Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: All data products are 2 meters RMSE or better in areas of unobstructed flat ground. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: 1 meter RMSE or better in unobstructed areas of unobstructed flat ground. Lineage: Process_Step: Process_Description: The NEXTMap DSM data products are derived using Intermap Technologies' STAR-3 airborne Interferometric SAR data acquisition system. The data for this tile was captured at 28000 feet above mean sea level with a primary look direction of West and the swaths with IDs 8, 9, 10, 11, 12, 13, 25, 26, 27 and 32. Small areas of missing data are interpolated using a continuous curvature spline over non-data areas. In larger areas of missing data, Intermap's proprietary editing process utilizes ancillary elevation data from secondary sources to fill the areas of missing data. Most incidents of missing data are due to radar shadow and layover in high-relief areas such as mountainous regions and highly developed urban areas and correspond to the look direction of the radar. Bodies of water are assigned an elevation which corresponds to the shoreline at the time the data was captured. Areas of null data are assigned the value -10000. Process_Date: 20121101 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Grid Cell Row_Count: 5774 Column_Count: 3192 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Albers Conical Equal Area Albers_Conical_Equal_Area: Standard_Parallel: 55.0 Standard_Parallel: 65.0 Longitude_of_Central_Meridian: -154.0 Latitude_of_Projection_Origin: 50.0 False_Easting: 0.0 False_Northing: 0.0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 5 Ordinate_Resolution: 5 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: NAD83 CORS96 EPOCH 2003.00 Ellipsoid_Name: GRS80 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257222101 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Datum_Name: NAVD88(Geoid09) Altitude_Resolution: 0.01 Altitude_Distance_Units: meters Altitude_Encoding_Method: Implicit coordinate Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: 32-bit image Entity_Type_Definition: The DEM is a 32 bit image on a 15-minute by 15-minute (lat/long) grid. The origin of the post is center center. Entity_Type_Definition_Source: https://www.intermap.com/hubfs/pdf/brochures/INTERMAP%20-%20Product%20Handbook.pdf Attribute: Attribute_Label: Elevation value per grid cell. Attribute_Definition: Height of the geoid, relative to mean sea level. Attribute_Definition_Source: https://www.intermap.com/hubfs/pdf/brochures/INTERMAP%20-%20Product%20Handbook.pdf Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.00 Range_Domain_Maximum: 928.92 Attribute_Units_of_Measure: meters Attribute_Measurement_Resolution: 0.01 Overview_Description: Entity_and_Attribute_Overview: Project Area: Alaska, Mission Number: 4700 Entity_and_Attribute_Detail_Citation: https://www.intermap.com/hubfs/pdf/brochures/INTERMAP%20-%20Product%20Handbook.pdf Metadata_Reference_Information: Metadata_Date: 20191203 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Intermap Technologies Inc. Contact_Position: Data Archive Manager Contact_Address: Address_Type: mailing address Address: 8310 South Valley Highway, Suite 400 City: Englewood State_or_Province: CO Postal_Code: 80112-5815 Country: USA Contact_Voice_Telephone: (303) 708-0955 Contact_Facsimile_Telephone: (303) 708-0952 Contact_Electronic_Mail_Address: service@intermap.com Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998