n54w165b4dsm.bil

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Intermap Technologies Inc.
Publication_Date: 20050708
Edition: 1
Title: n54w165b4dsm.bil
Geospatial_Data_Presentation_Form: Digital Elevation Model
Series_Information:
Series_Name: Digital Surface Models
Issue_Identification: Core Product Version: 3.3, Edit Rule Version: 1.0
Publication_Information:
Publication_Place: Englewood, CO
Publisher: Intermap Technologies Inc.
Online_Linkage: <URL:http://www.intermap.com>
Online_Linkage:
<URL:http://www.intermap.com/images/handbook/producthandbook.pdf>
Description:
Abstract:
Intermap DEMs populate its data store. The DEM products are generated using Intermap's STAR technology (Interferometric Synthetic Aperture Radar). The system is mounted in an aircraft.

The Digital Surface Model (DSM) 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 DSM data for 7.5-minute by 7.5-minute units correspond to the USGS 1:24,000 scale topographic quadrangle map series for areas in the United States and throughout the world. Each 7.5-minute by 7.5-minute DSM is comprised of elevations at 5 meter postings. Each tile provides full coverage with overlap into adjacent tiles. Data for locations above 56 degrees North/South are licensed in 7.5-minute by 15-minute tiles.

Purpose:
The DSMs are used as a fundamental layer of information in Geographic Information Systems (GIS) and Spatial Information Decision Support Systems (DSS). 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, hydrography, slope, aspect, and shoreline delineation.

Supplemental_Information:
None

Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20050624
Ending_Date: 20050624
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: -165.500021
East_Bounding_Coordinate: -165.374979
North_Bounding_Coordinate: 54.250021
South_Bounding_Coordinate: 54.124979
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
Stratum:
Stratum_Keyword_Thesaurus: MEL_Environmental_Domain_Thesaurus
Stratum_Keyword: Terrain
Stratum_Keyword: Earth
Stratum_Keyword: Surface
Stratum_Keyword: Ground
Stratum_Keyword: First
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Akun
Place_Keyword: Island
Place_Keyword: AK
Temporal:
Temporal_Keyword_Thesaurus: None
Temporal_Keyword: 2005
Temporal_Keyword: June
Access_Constraints: Purchase
Use_Constraints: End User License Agreement
Point_of_Contact:
Contact_Information:
Contact_Position: Data Archive Manager
Contact_Organization_Primary:
Contact_Organization: Intermap Technologies Inc.
Contact_Address:
Address_Type: mailing address
Address: 400 Inverness Drive S., Suite 330
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).
Cross_Reference:
Citation_Information:
Originator: Intermap Technologies Inc.
Publication_Date: Unknown
Title: n54w165b4ori.tif
Edition: 1
Geospatial_Data_Presentation_Form: Orthorectified Radar Image(ORI)
Series_Information:
Series_Name: Orthorectified Radar Image(ORI)
Issue_Identification: Core Product Version: 3.3, Edit Rule Version: 1.0
Online_Linkage: <URL:http://www.intermap.com>
Online_Linkage:
<URL:http://www.intermap.com/images/handbook/producthandbook.pdf>

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. <URL:http://www.intermap.com/images/handbook/producthandbook.pdf>
Logical_Consistency_Report: None
Completeness_Report:
Coverage maps are provided for each acquisition.<URL:http://www.intermap.com/images/handbook/producthandbook.pdf>
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 areas of unobstructed flat ground.
Lineage:
Process_Step:
Process_Date: 20050824
Process_Description:
This DEM data product was derived using Intermap Technologies airborne interferometric SAR data acquisition system. The flying height is 32,000 feet Above Mean Sea Level. The primary look direction is West. Areas of missing data are interpolated using continuous curvature spline over non-data areas. 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. Occurrences of non-data areas within a DEM are dependent on the look direction of the radar. Significant bodies of water are assigned an elevation which corresponds to the shoreline. Areas of null data are assigned the value -10000.


Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Grid Cell
Row_Count: 3001
Column_Count: 3001

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.0000416667
Longitude_Resolution: 0.0000416667
Geographic_Coordinate_Units: Decimal degrees
Geodetic_Model:
Horizontal_Datum_Name: NAD83
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(Geoid99) Alaska
Altitude_Resolution: 0.01 m
Altitude_Distance_Units: meter
Altitude_Encoding_Method: Implicit coordinate

Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: 5 meter posting grid cell
Entity_Type_Definition:
The DEM is a 32 bit IEEE floating point value organized in a one-channel Band Interleaved by Line file (BIL) on a 7.5-minute by 7.5-minute geographic (lat/long) grid. The origin of the post is center center.

Entity_Type_Definition_Source:
<URL:http://www.intermap.com/images/handbook/producthandbook.pdf>
Attribute:
Attribute_Label: Elevation value per grid cell.
Attribute_Definition: Height of the geoid, relative to mean sea level.
Attribute_Definition_Source:
<URL:http://www.intermap.com/images/handbook/producthandbook.pdf>
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.0
Range_Domain_Maximum: 381.61
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.01m
Overview_Description:
Entity_and_Attribute_Overview: Akun Island - 05008
Entity_and_Attribute_Detail_Citation:
<URL:http://www.intermap.com/images/handbook/producthandbook.pdf>

Metadata_Reference_Information:
Metadata_Date: 20050824
Metadata_Contact:
Contact_Information:
Contact_Position: Data Archive Manager
Contact_Organization_Primary:
Contact_Organization: Intermap Technologies Inc.
Contact_Address:
Address_Type: mailing address
Address: 400 Inverness Drive S., Suite 330
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
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 Wed Aug 24 09:10:40 2005