Closed-contour depressions (contours)

Metadata:

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

Identification_Information:

Description:

Abstract:

This layer shows the horizontal and vertical extent of closed-contour depressions on Guam. The data source is Taboroši, D. (2002), Karst features of Guam [MSc thesis], University of Guam, Mangilao, 324 pp. The contours were derived from a topographic 10-foot contour file for the entire island of Guam by manual editing in which all features except closed contours were removed. The depressions shown in this layer include depressions of a variety of origins: karst sinkholes, low-lying areas in the primary depositional surface, quarried areas, and other types.

Purpose: To inventory karst features on Guam.

Citation:

Citation_Information:

Originator: Danko Taboroši

Publication_Date: 2002

Title: Closed-contour depressions (contours)

Geospatial_Data_Presentation_Form: vector digital data

Online_Linkage:

<http://www.weriguam.org/reports/item/karst-features-of-guam-mariana-islands.html>

Status:

Progress: Complete

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: 145.375177

East_Bounding_Coordinate: 146.471031

North_Bounding_Coordinate: 15.082883

South_Bounding_Coordinate: 13.875193

Use_Constraints:

Data set is not for use in litigation. The Water & Environmental Research Institute (WERI) cannot assume liability for any damages or misrepresentations caused by any inaccuracies in the data or as a result of the data to be in a particular system. WERI should be given credit for the work involved in creating the dataset.

Data_Set_Credit:

Danko Taboroši, 1998-2000 Graduate Student, University of Guam (WERI)

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Danko Taboroši

Contact_Electronic_Mail_Address: taborosi@islandresearch.org

Keywords:

Theme:

Theme_Keyword: sinkholes

Theme_Keyword: closed-contour depression

Theme_Keyword: quarries

Theme_Keyword: contours

Theme_Keyword: contour lines

Theme_Keyword: karst

Place:

Place_Keyword: Guam

Place_Keyword: U.S. Territory

Place_Keyword: Mariana Islands

Place_Keyword: Micronesia

Place_Keyword: Western Pacific

Place_Keyword: Northwest Pacific

Place_Keyword: Pacific

Place_Keyword: Pacific Islands

Metadata_Reference_Information:

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time

Metadata_Contact:

Contact_Information:

Contact_Address:

Address_Type:

REQUIRED: The mailing and/or physical address for the organization or individual.

City: REQUIRED: The city of the address.

State_or_Province: REQUIRED: The state or province of the address.

Postal_Code: REQUIRED: The ZIP or other postal code of the address.

Contact_Person_Primary:

Contact_Person: Maria Kottermair

Contact_Organization: Water & Environmental Research Institute, University of Guam

Contact_Position: Research Assistant III

Contact_Electronic_Mail_Address: mariakottermair@uguamlive.uog.edu

Metadata_Date: 20131010

Distribution_Information:

Resource_Description: Downloadable Data.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Transfer_Size: 3.165

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector

Point_and_Vector_Object_Information:

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: sinkholes_contours

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: Length

Attribute:

Attribute_Label: Type

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.

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Planar_Distance_Units: meters

Coordinate_Representation:

Abscissa_Resolution: 0.000000

Ordinate_Resolution: 0.000000

Geodetic_Model:

Horizontal_Datum_Name: D_WGS_1984

Ellipsoid_Name: WGS_1984

Data_Quality_Information:

Lineage:

Process_Step:

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Danko Taboroši

Contact_Electronic_Mail_Address: taborosi@islandresearch.org

Process_Description:

The file was created by editing an existing USGS topographic coverage and removing all lines but the closed-contour contour depressions and associated tick marks. For that reason, not every single feature is actually karst. Some of it could be primary depositional or man-made features.

Process_Date: 2000

Process_Step:

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Maria Kottermair

Contact_Organization: Water & Environmental Research Institute, University of Guam

Contact_Position: Research Assistant III

Contact_Electronic_Mail_Address: mariakottermair@uguamlive.uog.edu

Process_Description:

Fix topology of major sinkholes (only) by moving parts of a contour line that were obviously shifted to connect to the other parts seamlessly. Topology was not tested using topology funtions in a geodatabase.

Process_Date: 20130914

Attribute_Accuracy:

Attribute_Accuracy_Report: Has not been assessed.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Has not been assessed but visual comparison with the high-accuracy LiDAR-derived contour-lines shows general agreement of location.

Logical_Consistency_Report:

Contour lines include tick marks and crosses. Some contour lines are not continuous or cross each other.

Completeness_Report:

This dataset is believed to be complete based on the source data set.

Lineage: