Identification_Information: Citation: Citation_Information: Originator: USGS Originator: Coastal Management Program (American Samoa Government Dept. of Commerce) Publication_Date: 1963 Publication_Time: Unknown Title: Digital Elevation Model - Manu'a Islands, American Samoa Geospatial_Data_Presentation_Form: raster digital data Publication_Information: Publication_Place: Reston, VA Publisher: USGS Online_Linkage: http://dusk.geo.orst.edu/djl/samoa/ Description: Abstract: Digital Elevation Model (DEM) of the Manu'a Islands, American Samoa, originally created by the USGS. Updated (shifted to correct position) in 2002 during a project to acquire and geo-reference IKONOS satellite imagery. Purpose: General use. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1963 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -169.751905 East_Bounding_Coordinate: -169.374331 North_Bounding_Coordinate: -14.126120 South_Bounding_Coordinate: -14.380660 Keywords: Theme: Theme_Keyword_Thesaurus: none Theme_Keyword: DEM Theme_Keyword: Digital Elevation Model Theme_Keyword: USGS Theme_Keyword: Elevation Theme_Keyword: Altitiude Theme_Keyword: 10 meters Place: Place_Keyword: Pacific Ocean Place_Keyword: American Samoa Place_Keyword: United States Place_Keyword: Oceania Place_Keyword: Manua Place_Keyword: Ofu Place_Keyword: Olosega Place_Keyword: Tau Place: Place_Keyword_Thesaurus: none Stratum: Stratum: Stratum_Keyword_Thesaurus: none Temporal: Temporal_Keyword_Thesaurus: none Temporal_Keyword: 2002 Temporal_Keyword: 1963 Access_Constraints: none Use_Constraints: none Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Kevin Cronk Contact_Organization: ASCMP Contact_Position: GIS Associate Contact_Address: Address_Type: mailing address Address: Executive Office Building City: Pago Pago State_or_Province: AS Postal_Code: 96799 Country: USA Contact_Voice_Telephone: 011-684-633-5155 Contact_Facsimile_Telephone: 011-684-633-4195 Contact_Electronic_Mail_Address: KCRONK@doc.asg.as Hours_of_Service: 7-4 Security_Information: Security_Classification_System: none Security_Classification: Unclassified Native_Data_Set_Environment: Microsoft Windows NT Version 4.0 (Build 1381) Service Pack 6; ESRI ArcCatalog 8.2.0.700 Cross_Reference: Citation_Information: Publication_Date: Unpublished Material Publication_Time: Unknown Geospatial_Data_Presentation_Form: vector digital data Publication_Information: Other_Citation_Details: Original filename Data_Quality_Information: Attribute_Accuracy: Logical_Consistency_Report: DEM overlays well with GIS data products based upon the newly established NAD83 datum. However, errors in the shorline have been noted, perhaps due to shoreline change over time and/or improved remote sensing technologies. Positional_Accuracy: Horizontal_Positional_Accuracy: Lineage: Source_Information: Source_Citation: Citation_Information: Originator: United States Geological Survey Publication_Date: 1963 Title: DEM Tutuila Publication_Information: Publication_Place: Reston, VA Publisher: USGS Online_Linkage: http://www.usgs.gov/ Type_of_Source_Media: CD-ROM Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1963 Source_Currentness_Reference: ground condition Process_Step: Process_Description: Process for Adjusting USGS DEMs for Guam, Rota, Tinian, Aguijan, Saipan, Tutuila, and the Manua Islands. Work performed by Erik Hund at the Coastal Services Center (NOAA). 1. The IKONOS images and DEMs of each island were imported into PCI Orthoengine. 2. The IKONOS images were first orthorectified without a DEM using the Rational Functions model, and the resulting image was compared to the DEM. If the shoreline in the DEM matched the orthorectified IKONOS shoreline, then the DEM was considered accurate in the X and Y direction. If the DEM did not match the IKONOS image, then the offset in the X and Y direction was determined and the DEM was adjusted using a program called geoshft_meter.eas, written by Kris Holderied at NOAA NOS in Silver Spring, Maryland. 3. After adjusting the DEM in the X and Y direction, the sea level height of the DEM was determined. If the seas level values were less than zero, the Z values were adjusted up to zero by using the Replace Image Value option under the Utilities menu selection in PCI Orthoengine. 4. The DEMs were then converted from mean sea level heights to ellipsoid heights by selecting the Convert DEM Datum option from the Utilities menu selection. 5. The DEMS were then exported as geotiff files from PCI. 6. All of the DEMs are in the UTM projection, WGS 84 datum. American Samoa is Zone 2 South. Guam and CNMI are Zone 55 North. Image converted to a ArcINFO raster grid and values changed to reflect height above mean sea level by personnel at the Department of Commerce in American Samoa. Process_Date: 2002 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Coastal Services Center Contact_Address: Address_Type: mailing and physical address Address: 2234 S. Hobson Ave City: Charleston State_or_Province: SC Postal_Code: 29405-2413 Country: USA Contact_Voice_Telephone: 843-740-1280 Contact_Facsimile_Telephone: 843-740-1315 Contact_Electronic_Mail_Address: Erik.Hund@noaa.gov Process_Step: Process_Description: Dataset copied. Source_Used_Citation_Abbreviation: D:\Topography\Land\DEM\man_dem Process_Step: Process_Description: Dataset copied. Source_Used_Citation_Abbreviation: C:\GIS_new\Databank\Topography\Land\UTM_NAD83\man_dem10m Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: G-polygon Point_and_Vector_Object_Count: 15 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Point Point_and_Vector_Object_Count: 4 Raster_Object_Information: Raster_Object_Type: Grid Cell Row_Count: 2791 Column_Count: 4057 Vertical_Count: 1 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: -2 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -171.000000 Latitude_of_Projection_Origin: 0.000000 False_Easting: 500000.000000 False_Northing: 10000000.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: row and column Coordinate_Representation: Abscissa_Resolution: 10.000000 Ordinate_Resolution: 10.000000 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: D_WGS_1984 Ellipsoid_Name: WGS_1984 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257224 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: man_dem10m Attribute: Attribute_Label: ObjectID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Value Attribute_Definition: Altitude in meters above sea level. Attribute_Definition_Source: USGS Attribute: Attribute_Label: Count Attribute: Attribute_Label: Value Attribute: Attribute_Label: Count Distribution_Information: Resource_Description: Downloadable Data Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Transfer_Size: 1.404 Metadata_Reference_Information: Metadata_Date: 20021105 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Kevin Cronk Contact_Organization: ASCMP Contact_Position: GIS Associate Contact_Address: Address_Type: mailing address Address: DOC, Executive Office Building City: Pago Pago State_or_Province: AS Postal_Code: 96799 Country: USA Contact_Voice_Telephone: 684-633-5155 Contact_Facsimile_Telephone: 684-633-5155 Contact_Electronic_Mail_Address: KCRONK@doc.asg.as Hours_of_Service: 7:30 a.m. to 4:00 p.m., -11 hours GMT Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile