DTM_n6615w15830P.tif

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Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Intermap Technologies Inc.
Publication_Date: 20130306
Title: DTM_n6615w15830P.tif
Edition: 1
Geospatial_Data_Presentation_Form: Digital Elevation Model
Series_Information:
Series_Name: Digital Terrain Models
Issue_Identification: Core Product Version: 4.4.1, Edit Rule Version: 3.2
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 Terrain Model (DTM) data product represents the bare earth and is derived from the Digital Surface Model (DSM) using Intermap's proprietary algorithm and editing processes. 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 DTM 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 <http://www.intermap.com/Portals/0/doc/Brochures/INTERMAP_Product_Handbook.pdf>.
Purpose:
The DTMs are used as a fundamental layer of information in 3D geospatial analysis and spatial information Decision Support Systems (DSS). Typical applications include storm surge analysis, flood planning and watershed analysis, radio propagation modeling, and contour generation. 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: 20120723
Ending_Date: 20120824
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: -158.550396
East_Bounding_Coordinate: -158.202362
North_Bounding_Coordinate: 66.509935
South_Bounding_Coordinate: 66.239969
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: 2012
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. <http://www.intermap.com/Portals/0/doc/Brochures/INTERMAP_Product_Handbook.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 DTM data products are derived using Intermap Technologies' STAR-3 airborne Interferometric SAR data acquisition system. The data for this tile was captured at 25200 feet above mean sea level with a primary look direction of West and the swaths with IDs 151, 160, 161 and 251. 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: 5836
Column_Count: 2746

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:
<http://www.intermap.com/Portals/0/doc/Brochures/INTERMAP_Product_Handbook.pdf>
Attribute:
Attribute_Label: Elevation value per grid cell.
Attribute_Definition: Height of the geoid, relative to mean sea level.
Attribute_Definition_Source:
<http://www.intermap.com/Portals/0/doc/Brochures/INTERMAP_Product_Handbook.pdf>
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 10.50
Range_Domain_Maximum: 346.48
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:
<http://www.intermap.com/Portals/0/doc/Brochures/INTERMAP_Product_Handbook.pdf>

Metadata_Reference_Information:
Metadata_Date: 20130306
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

Generated by mp version 2.8.12 on Fri May 03 09:46:38 2013