Sinkholes and other closed-contour depressions (location)

Metadata:

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

Identification_Information:

Description:

Abstract:

This dataset shows the location of major sinkholes and other closed-contour depressions on Guam. The point location is generally the lowest point of the depression and not necessarily the center of the feature.

Purpose: For general planning purposes.

Supplemental_Information:

The features were digitzed on-screen by visual interpretation of up-to-date source layers, primarily LiDAR-derived surface raster layers and satellite imagery (2011). Note that this dataset is by no means a complete inventory of all sinkholes and closed-contour depressions on Guam, only the majority of larger features were captured; also some 'sinkholes' may in fact be man-made quarries or other type of closed-contour depressions.

Data_Set_Credit: Maria Kottermair, University of Guam (WERI)

Point_of_Contact:

Contact_Information:

Contact_Position: Research Assistant III

Contact_Voice_Telephone: +1-671-735-2686

Contact_Electronic_Mail_Address: mariakottermair@uguamlive.uog.edu

Contact_Person_Primary:

Contact_Person: Maria Kottermair

Contact_Organization: Water & Environmental Research Institute, University of Guam

Citation:

Citation_Information:

Title: Sinkholes and other closed-contour depressions (location)

Originator: Water & Environmental Research Institute, University of Guam

Publication_Date: September 2013

Online_Linkage: www.hydroguam.net

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.

Native_Data_Set_Environment: ArcMap 10.1

Keywords:

Theme:

Theme_Keyword: sinkholes

Theme_Keyword: closed-contour depressions

Theme_Keyword: quarries

Place:

Place_Keyword: Guam

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

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2011

Currentness_Reference: ground condition

Status:

Progress: In work

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: sinkholes

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: Name

Attribute:

Attribute_Label: Type

Attribute_Definition: Type of feature

Attribute:

Attribute_Label: Comment

Attribute:

Attribute_Label: Latitude

Attribute:

Attribute_Label: Longitude

Data_Quality_Information:

Lineage:

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:

Sinkholes were digitzed on-screen based on various LiDAR (2007)-derived surface raster layers (DEM, hillshade, slope, etc). WorldView2 satellite imagery by Digital Globe from 2011 was used as secondary source. USGS Topo Maps were used for name and type information.

Process_Date: September 2013

Source_Information:

Source_Citation:

Citation_Information:

Title: 2007 LiDAR-derived DEM

Originator: Joint Airborne Lidar Bathymetric Center of Expertise (JALBTCX)

Publication_Date: 2007

Other_Citation_Details: LiDAR data was collected by JALBTX for the Government of Guam

Source_Information:

Source_Citation:

Citation_Information:

Title: WorldView2 satellite Imagery

Originator: Digital Globe

Publication_Date: 2011

Source_Information:

Source_Citation:

Citation_Information:

Title: USGS Topo Maps 1:24000

Originator: United States Geological Survey

Publication_Date: 2000

Attribute_Accuracy:

Attribute_Accuracy_Report:

Attribute accuracy has not been evaluated. Only few fields have been populated. The type information (e.g. borrow pit) was generally only included if it was present in the USGS Topo Map.

Logical_Consistency_Report:

Data are believed to be logically consistent. Sinkholes were identified using LiDAR-derived surface raster layers. WorldView2 satellite imagery by Digital Globe from 2011 and USGS Topo Maps 1:24,000 for secondary reference.

Completeness_Report:

This dataset is believed to be complete regarding the location of major sinkholes and other closed-contour depresssions. Smaller features may not be included here. Attributes are incomplete but will be added as field work

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

The location of the point is not neccessarily the true center of the feature. The source layers are based on high-accuracy LiDAR-derived data and satellite imagery.

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geodetic_Model:

Horizontal_Datum_Name: D_WGS_1984

Ellipsoid_Name: WGS_1984

Planar:

Planar_Coordinate_Information:

Planar_Distance_Units: meters

Metadata_Reference_Information:

Metadata_Date: 20131010

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Maria Kottermair

Contact_Organization: Water & Environmental Research Institute, University of Guam

Contact_Position: Water & Environmental Research Institute, University of Guam

Contact_Electronic_Mail_Address: mariakottermair@uguamlive.uog.edu

Spatial_Data_Organization_Information:

Point_and_Vector_Object_Information:

Lineage: