tl5c_glacgeol_u6

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Alaska Geobotany Center

Publication_Date: Unknown

Title: tl5c_glacgeol_u6

Geospatial_Data_Presentation_Form: vector digital data

Online_Linkage: \\137.229.50.172\geodata\arcticAtlasMaster.gdb

Description:

Abstract:

The Toolik Lake Grid map focuses on the south side of Toolik Lake. This areas is on of the principal intensive research areas at the Toolik Lake Field Station. It includes many experimental research sites where long-term observations and experiments are being conducted, including the greenhouse and snow-fence experimetns. The grid was constructed in 1989 to provide geographic referencing for experimental plots and to provide a sampling scheme for periodic measurements of snow, active layer and plant communities.
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 Research Grid 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 research grid for use by various research projects.

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: -149.622532

East_Bounding_Coordinate: -149.593013

North_Bounding_Coordinate: 68.626764

South_Bounding_Coordinate: 68.616895

Keywords:

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category

Theme_Keyword: environment

Theme_Keyword: geoscientificInformation

Theme:

Theme_Keyword_Thesaurus: Alaska Geobotany Center

Theme_Keyword: tl5c

Theme_Keyword: ITUM

Theme_Keyword: geology

Theme_Keyword: glacial

Theme_Keyword: tundra

Theme_Keyword: research grid

Theme_Keyword: LTER

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

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.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

Lineage:

Process_Step:

Process_Description: Dataset copied.

Process_Date: 20091208

Process_Time: 16104500

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: 2

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: tl5c_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: 12

Enumerated_Domain_Value_Definition: Itkillik II outwash

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