tl5k_glacgeol_u6

Metadata also available as

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Alaska Geobotany Center
Publication_Date: Unknown
Title: tl5k_glacgeol_u6
Geospatial_Data_Presentation_Form: vector digital data
Online_Linkage: \\137.229.50.172\geodata\arcticAtlasMaster.gdb
Description:
Abstract:
The map encloses a 20 km^2 area surrounding Toolik Lake that stretches from the Dalton Highway on the east to Jade Mountain on the west. It includes the Toolik Field Station, the old Toolik Lake pipeline construction camp gravel pad and airstrip on the northeast side ot he lake and the primary terrestrial research areas on the south, west and east sides of the lake, as well as several smaller research lakes in the immediate vicinity of Toollik Lake. The area contains surfaces with irregular topography that were glaciated during the Late Pleistocene. The glacial geology of the region affects a wide variety of landscape and ecosystem properties including topography, abundance of lakes, plant production, soil carbon, spectral reflectance, biodiversity, trace-gas fluxes and heat flux of the landscape. Glacial deposits within the Toolik Lake area are assigned to Itkillik I (late Pleistocene, about 120-150 kya) and Itkillik II (late Pleistocene, about 25-11.5 kya) glaciations of the central Brooks Range glacial sussession.
Purpose:
Map of the glacial geology in the Toolik Lake area for use by various research projects.
Supplemental_Information:
Metadata was created by copying appropriate metadata from the hamilton_surfgeology feature class (G:\arcticAtlasMaster.gdb\uk25k\hamilton_surfgeology), or the explanation of the Vegetation in the vicinity of the Toolik Field Station, Alaska, Upper Kuparuk River Region paper map. Gayle Neufeld 20100128
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: unknown
Currentness_Reference: Unknown
Status:
Progress: In work
Maintenance_and_Update_Frequency: Unknown
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -149.670312
East_Bounding_Coordinate: -149.545211
North_Bounding_Coordinate: 68.656236
South_Bounding_Coordinate: 68.609407
Keywords:
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: environment
Theme_Keyword: geoscientificInformation
Theme:
Theme_Keyword_Thesaurus: Alaska Geobotany Center
Theme_Keyword: tl5k
Theme_Keyword: ITUM
Theme_Keyword: geology
Theme_Keyword: glacial
Theme_Keyword: tundra
Place:
Place_Keyword_Thesaurus: Alaska Geobotany Center
Place_Keyword: arctic
Place_Keyword: Alaska
Place_Keyword: northslope
Place_Keyword: Upper Kaparuk River region
Place_Keyword: Toolik Lake area
Access_Constraints: Unknown
Use_Constraints:
Data provided by the Alaska Geobotany Center are copyright protected under the provisions of a Creative Commons Attribution-NonCommercial-ShareAlike License (<http://creativecommons.org/licenses/by-nc-sa/1.0/>). Materials may be freely downloaded, reprinted and redistributed for non-commercial use. Reproduction and redistribution of the materials on this web site, including derivative works, shall give credit to the Alaska Geobotany Center and remain subject to the above license. Any web pages that use this material shall contain a link pointing to the Alaska Geobotany Center home page (<http://www.geobotany.uaf.edu/>).
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Alaska Geobotany Center
Contact_Person: Hilmar A. Maier
Contact_Position: GIS and Remote Sensing Manager
Contact_Address:
Address_Type: physical address
Address: Alaska Geobotany Center
Address: Institute of Arctic Biology
Address: University of Alaska Fairbanks
City: Fairbanks
State_or_Province: AK
Postal_Code: 99775
Country: US
Contact_Voice_Telephone: +1.907.474.1540
Contact_Voice_Telephone: +1.907.474.2459
Contact_Voice_Telephone: +1.907.474.2460
Contact_Electronic_Mail_Address: hilmar.maier@alaska.edu
Contact_Instructions: <http://www.geobotany.org/>
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.1850

Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Geologic data used in the compilation was derived from the field maps and notes and generated by the upper Kaparuk River region glacial geology map (Hamilton 2003) as well as data from other sources as noted in the "Source_Information" section of Thomas Hamilton's map. Location data for geologic point coverages was acquired from hand held GPS units and compiled on paper field maps, air photos, and notebooks. A paper compilation map composed of all of the geologic information elements was scanned and digitized using a digitizing tablet. Spatial data attributes were attached to data objects using ArcInfo. Attributes were verified for consistency and completeness during the creation of the metadata.
Logical_Consistency_Report:
Topology is present on appropriate polygon and line data tables; others are point data tables.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Location data and estimated position errors were manually entered into a spreadsheet. Sample numbers and locations with selected data were spatially registered and analyzed in ArcGIS software. Location data was determined visually using topographic maps at a scale of 1:63,360 and 1:50,000 (nominal) scale, color-infrared aerial photographs. See "Source_Information" section for horizontal positional accuracy of locations not measured by DGGS.
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Value: 10
Horizontal_Positional_Accuracy_Explanation:
A value of estimated position error in meters was calculated by hand held GPS units and recorded for each sample location. Estimated position error calculated by the GPS units was not less than 3 meters and averaged approximately 6 meters. The GPS system suffers from calculation and geometric error. This error results from items such as error in satellite positions, mathematical error introduced by the formulas used by the GPS unit for calculating position, and errors caused by narrow satellite alignments. Estimated position error is a value determined by the GPS manufacturer for the calculation and geometric error as a whole. "Selective availability," a deliberate degradation of GPS data managed by the U.S. government that induces an additional error of approximately 100 meters to a GPS location, was not in effect during DGGS's 2001 field work.
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Value: 100
Horizontal_Positional_Accuracy_Explanation:
value of estimated position error in meters. Surficial geologic map data have a horizontal positional accuracy dependent on: 1) the 1:50,000-scale (nominal) aerial photographs on which it is based, with an estimated potential error due to a pen line width of approximately 0.001 being equivalent to approximately 1.5 meters on the ground; 2) the accuracy of the human zoom transfer scope operator in tracing the line work from acetate overlays to topographic base maps, with an estimated error due to a pen line width of approximately 0.001 being equivalent to approximately 1.5 meters on the ground; 3) the accuracy of the zoom transfer process itself, error magnitude highly variable and unknown but potentially large; 4) the digitizing RMS error of 0.003 inches (input coverage units), which equates to approximately 5 meters on the ground for a 1:63,360-scale map; and 5) the accuracy of the human operator digitizing the geologic from the topographic base maps, with an estimated error due to a pen line width of approximately 0.001 being equivalent to approximately 1.5 meters on the ground. The surficial field maps were digitized using a map tablet and cross-hair mouse. Map error is induced by: (1) transferring map data from base topography to a Mylar compilation map, with an estimated potential error due to a pen line width of approximately 0.001 being equivalent to approximately 1.5 meters on the ground; (2) the digitizing RMS error [24 control points on a regular grid have an average RMS error of 10.8 meters on the ground; individual control point error ranges from 4.3 to 21.2 meters on the ground]; and (3) the accuracy of the human operator digitizing the geologic line work from the topographic base map, with an estimated error due to a pen line width of approximately 0.001 being equivalent to approximately 1.5 meters on the ground. Total potential horizontal error for geologic map features is estimated to be approximately 100 meters.
Lineage:
Process_Step:
Process_Description: Dataset copied.
Process_Date: 20091207
Process_Time: 16191300

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: G-polygon
Point_and_Vector_Object_Count: 5

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 6
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -147.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 500000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.000100
Ordinate_Resolution: 0.000100
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Resolution: 0.000100
Altitude_Encoding_Method:
Explicit elevation coordinate included with horizontal coordinates

Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: tl5k_glacgeol_u6
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: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: glacgeol
Attribute_Definition: Glacial geology
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 1
Enumerated_Domain_Value_Definition: Itkillik I drift
Enumerated_Domain_Value_Definition_Source: AGC
Enumerated_Domain:
Enumerated_Domain_Value: 2
Enumerated_Domain_Value_Definition: Itkillik II drift
Enumerated_Domain_Value_Definition_Source: AGC
Enumerated_Domain:
Enumerated_Domain_Value: 11
Enumerated_Domain_Value_Definition: Itkillik I outwash
Enumerated_Domain_Value_Definition_Source: AGC
Enumerated_Domain:
Enumerated_Domain_Value: 12
Enumerated_Domain_Value_Definition: Itkillik II outwash
Enumerated_Domain_Value_Definition_Source: AGC
Enumerated_Domain:
Enumerated_Domain_Value: 16
Enumerated_Domain_Value_Definition: Bedrock
Enumerated_Domain_Value_Definition_Source: AGC
Attribute:
Attribute_Label: Shape_Length
Attribute_Definition: Length of feature in internal units.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Positive real numbers that are automatically generated.
Attribute:
Attribute_Label: Shape_Area
Attribute_Definition: Area of feature in internal units squared.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Positive real numbers that are automatically generated.

Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Alaska Geobotany Center
Contact_Person: Hilmar A. Maier
Contact_Position: GIS and Remote Sensing Manager
Contact_Address:
Address_Type: physical address
Address: Alaska Geobotany Center
Address: Institute of Arctic Biology
Address: University of Alaska Fairbanks
City: Fairbanks
State_or_Province: AK
Postal_Code: 99775
Country: US
Contact_Voice_Telephone: +1.907.474.1540
Contact_Voice_Telephone: +1.907.474.2459
Contact_Voice_Telephone: +1.907.474.2460
Contact_Electronic_Mail_Address: dataManager@geobotany.org
Contact_Instructions: <http://www.geobotany.org/>
Resource_Description: Downloadable Data
Distribution_Liability: Unknown

Metadata_Reference_Information:
Metadata_Date: 20100203
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Alaska Geobotany Center
Contact_Person: Gayle Neufeld
Contact_Position: GIS technician
Contact_Address:
Address_Type: physical address
Address: Alaska Geobotany Center
Address: Institute of Arctic Biology
Address: University of Alaska Fairbanks
City: Fairbanks
State_or_Province: AK
Postal_Code: 99775
Country: US
Contact_Voice_Telephone: +1.907.474.1540
Contact_Voice_Telephone: +1.907.474.2459
Contact_Voice_Telephone: +1.907.474.2460
Contact_Electronic_Mail_Address: dataManager@geobotany.org
Contact_Instructions: <http://www.geobotany.org/>
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

Generated by mp version 2.9.6 on Wed Feb 03 13:58:49 2010