"merc1swmr.bil"

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Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Intermap Technologies Inc.
Publication_Date: 20031115
Title: "merc1swmr.bil"
Edition: 1
Geospatial_Data_Presentation_Form: Digital Elevation Model
Series_Information:
Series_Name: Digital Surface Models
Issue_Identification: Version 1
Publication_Information:
Publication_Place: Englewood, CO
Publisher: Intermap Technologies Inc.
Online_Linkage: <URL:http://www.intermaptechnologies.com>
Online_Linkage: <URL:http://istore.intermaptechnologies.com/handbook.cfm>

Description:
Abstract:
This data set is a digital elevation model (DEM). The DEM products are generated using the Intermap STAR-3i® airborne interferometric synthetic aperture radar (SAR) system mounted in a LearJet 36A 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 18-minute units correspond to the USGS 1:63,360 scale topographic quadrangle map series for available areas in the United States. Each 7.5-minute by 18-minute DSM is based on 5m postings using the Universal Transverse Mercator (UTM) projection. Each 7.5-minute by 18-minute tile provides full coverage with overlap into adjacent 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 DEMs, including elevation, hydrography, slope, aspect, and shoreline delineation.

Supplemental_Information:
The STAR-3i® system employs three principal 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 <URL:http://www.intermaptechnologies.com>.

Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20030729
Ending_Date: 20030807
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: -156.600
East_Bounding_Coordinate: -156.300
North_Bounding_Coordinate: 70.625
South_Bounding_Coordinate: 70.500

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: National
Place_Keyword: Petroleum
Place_Keyword: Reserve
Temporal:
Temporal_Keyword_Thesaurus: None
Temporal_Keyword: 2003
Temporal_Keyword: July

Access_Constraints: Purchase
Use_Constraints: None

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: <mailto:info@intermaptechnologies.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 and quality control report. The data set was developed on a Sun ULTRA SPARC 2 computer system running Solaris (UNIX).

Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Calculation of the digital elevation model accuracy is described in the Product Handbook User's Guide. <URL:http://istore.intermaptechnologies.com/handbook.cfm>

Logical_Consistency_Report: <URL:merc1swcx.pdf>

Completeness_Report:
Coverage maps are provided for each area of acquisition. <URL:http://istore.intermaptechnologies.com/archive.cfm>

Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report: 2.5 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: 20031115
Process_Description:
This DEM data product was derived using Intermap Technologies' STAR-3i® airborne interferometric SAR data acquisition system. The flying height is 20,000 feet Above Sea Level. The primary look direction is North. Areas of missing data are interpolated using continuous curvature spline over non-data areas. The phase unwrapper utilized is ifprocT. 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 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 -32767.


Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster

Raster_Object_Information:
Raster_Object_Type: Grid Cell
Row_Count: 3040
Column_Count: 2645


Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 4
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: 159 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: 5.0
Ordinate_Resolution: 5.0
Planar_Distance_Units: Meters
Geodetic_Model:
Horizontal_Datum_Name: NAD83
Ellipsoid_Name: GRS80
Semi-major_Axis: 6,378,137
Denominator_of_Flattening_Ratio: 298.257222101

Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Datum_Name: NAVD88 - Geoid99
Altitude_Resolution: 0.01 m or better
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 Big Endian organized in a one-channel binary interleaved file (BIL) on a 7.5-minute by 18.0-minute geographic (lat/long) grid in UTM projection. The origin of the post is center center.
Entity_Type_Definition_Source: <URL:http://istore.intermaptechnologies.com/handbook.cfm>
Attribute:
Attribute_Label: Elevation value per grid cell.
Attribute_Definition: Height of the geoid, relative to mean sea level.
Attribute_Definition_Source: <URL:http://istore.intermaptechnologies.com/handbook.cfm>
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 3.555
Range_Domain_Maximum: 27.938
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.01 m or better
Overview_Description:
Entity_and_Attribute_Overview:
Project Information
NPRA3 Task Order#: 01010C0042
Project Area: National Petroleum Reserve Alaska
Intermap Project Number: 03015
Time of Collection
Flight Segment: m401p101s1
Base Stations: ATQ1
Flight Direction: -83.4
Pass Acquisition Start Time (includes GPS week): 384508.1745
Pass Acquisition Start Time (GPS in HH:MM:SS): 10:48:28
Pass Acquisition Start Time (UTC in HH:MM:SS): 12:58:03
Pass Acquisition End Time (includes GPS week): 385240.5405
Pass Acquisition End Time (GPS in HH:MM:SS): 11:00:41
Pass Acquisition End Time (UTC in HH:MM:SS): 11:00:28
Pass Acquisition Date: 7-Aug-03
Flight Segment: m401p101s2
Base Stations: ATQ1
Flight Direction: -83.4
Pass Acquisition Start Time (includes GPS week): 384508.1745
Pass Acquisition Start Time (GPS in HH:MM:SS): 10:48:28
Pass Acquisition Start Time (UTC in HH:MM:SS): 12:58:03
Pass Acquisition End Time (includes GPS week): 385240.5405
Pass Acquisition End Time (GPS in HH:MM:SS): 11:00:41
Pass Acquisition End Time (UTC in HH:MM:SS): 11:00:28
Pass Acquisition Date: 7-Aug-03
Flight Segment: m401p89s1
Base Stations: ATQ1
Flight Direction: -84.5
Pass Acquisition Start Time (includes GPS week): 314417.6349
Pass Acquisition Start Time (GPS in HH:MM:SS): 15:20:18
Pass Acquisition Start Time (UTC in HH:MM:SS): 15:34:15
Pass Acquisition End Time (includes GPS week): 315130.6489
Pass Acquisition End Time (GPS in HH:MM:SS): 15:32:11
Pass Acquisition End Time (UTC in HH:MM:SS): 15:31:58
Pass Acquisition Date: 6-Aug-03
Flight Segment: m401p89s2
Base Stations: ATQ1
Flight Direction: -84.5
Pass Acquisition Start Time (includes GPS week): 314417.6349
Pass Acquisition Start Time (GPS in HH:MM:SS): 15:20:18
Pass Acquisition Start Time (UTC in HH:MM:SS): 15:34:15
Pass Acquisition End Time (includes GPS week): 315130.6489
Pass Acquisition End Time (GPS in HH:MM:SS): 15:32:11
Pass Acquisition End Time (UTC in HH:MM:SS): 15:31:58
Pass Acquisition Date: 6-Aug-03
Flight Segment: m401p95s1
Base Stations: ATQ1
Flight Direction: -84.8
Pass Acquisition Start Time (includes GPS week): 343204.8791
Pass Acquisition Start Time (GPS in HH:MM:SS): 23:20:05
Pass Acquisition Start Time (UTC in HH:MM:SS): 12:06:53
Pass Acquisition End Time (includes GPS week): 343913.5049
Pass Acquisition End Time (GPS in HH:MM:SS): 23:31:54
Pass Acquisition End Time (UTC in HH:MM:SS): 23:31:41
Pass Acquisition Date: 6-Aug-03
Flight Segment: m401p95s2
Base Stations: ATQ1
Flight Direction: -84.8
Pass Acquisition Start Time (includes GPS week): 343204.8791
Pass Acquisition Start Time (GPS in HH:MM:SS): 23:20:05
Pass Acquisition Start Time (UTC in HH:MM:SS): 12:06:53
Pass Acquisition End Time (includes GPS week): 343913.5049
Pass Acquisition End Time (GPS in HH:MM:SS): 23:31:54
Pass Acquisition End Time (UTC in HH:MM:SS): 23:31:41
Pass Acquisition Date: 6-Aug-03
Intermap Processing AML Version: 1.1.3, 20031104
ISO 9001 Certification No.: A8379
DEM Origin (North West Corner)
UTM_Easting_(meters): 588072.5
UTM_Northing_(meters): 7838197.5
DEM Extents
UTM_Easting_(meters): Min. 588070 Max. 601295
UTM_Northing_(meters): Min. 7823000 Max. 7838200
Entity_and_Attribute_Detail_Citation:
<URL:http://istore.intermaptechnologies.com/handbook.cfm>


Metadata_Reference_Information:
Metadata_Date: 20031205
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: <mailto:info@intermaptechnologies.com>
Metadata_Security_Information:
Metadata_Security_Classification_System: None
Metadata_Security_Classification: None
Metadata_Security_Handling_Description: None

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998


Generated by mp version 2.5.6 on Fri Dec 5 15:29:58 2003