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:
