Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Originator: University of Guam Publication_Date: 20020101 Title: Pohnpei Extent of Coral Reefs Geospatial_Data_Presentation_Form: vector digital data Online_Linkage: http://www.islands.fm/atlas/#/pohnpei-state Description: Abstract: This dataset the extent of coral reefs around Pohnpei. The data layer shown here is a subset of Pohnpei base layer. The original data, so-called Digital Line Graphs (DLSs), were created by U.S. Geological Survey (USGS) for the 1:25,000-scale topographic maps (2001). The shoreline was modified by by University of Guam (UOG) (2017) based on 2016 Worldview-3 satellite imagery from Digital Globe. The dataset was slightly shifted and also updated (mainly around Kolonia and its vicinity). Purpose: To show the extent of coral reefs around Pohnpei. Supplemental_Information: The dataset is included the Digital Atlas of Micronesia, module Pohnpei, by Island Research & Education Initiative (iREi), in collaboration with Water and Environmental Research Institute of the Western Pacific (WERI) University of Guam and partial funding from United States Geological Survey (USGS), under WRRI 104-B Program, project # 2016GU302B. Status: Progress: Complete Maintenance_and_Update_Frequency: Irregular Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: 158.081255 East_Bounding_Coordinate: 158.3684 North_Bounding_Coordinate: 7.057857 South_Bounding_Coordinate: 6.758177 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: coral reef Theme_Keyword: lagoon Theme_Keyword: island Theme_Keyword: Digital Line Graph Theme_Keyword: DLG Theme_Keyword: hydrography Place: Place_Keyword_Thesaurus: None Place_Keyword: Pohnpei Place_Keyword: Federated States of Micronesia (FSM) Place_Keyword: U.S. Affiliated Pacific Islands (USAPI) Place_Keyword: Caroline Islands Place_Keyword: Micronesia Place_Keyword: Northwestern Pacific Place_Keyword: Pacific Ocean Access_Constraints: None Use_Constraints: There are no expressed warranties associated with the release of these databases. Specifically, no warranty is made that the GIS data or any subsequent updates will be error free and no warranty is made regarding the positional or thematic accuracy of the GIS data. The GIS data and any features it depicts do not represent or confer any legal rights, privileges, benefits, boundaries or claims of any kind. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: University of Guam Contact_Person: Maria Kottermair Contact_Position: Geospatial Coordinator Contact_Electronic_Mail_Address: mariakottermair@triton.uog.edu Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Drew Decker Contact_Position: National Map Liaison for Pacific Region Contact_Address: Address_Type: mailing and physical Address: 4165 Spruance Road City: San Diego State_or_Province: CA Postal_Code: 92101 Country: US Contact_Voice_Telephone: 619-225-6430 Contact_Electronic_Mail_Address: ddecker@usgs.gov Data_Set_Credit: Original dataset by U.S. Geological Survey (USGS); Partly updated by by University of Guam (UOG) . Native_Data_Set_Environment: Version 6.2 (Build 9200) ; Esri ArcGIS 10.2.2.3552 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Attribute accuracy is tested by manual comparison of the source with hard copy plots and/or symbolized display of the digital line graph on an interactive computer graphic system. Through inspection and queries, attempts were made to ensure completeness and consistency of attribute values. Logical_Consistency_Report: Topological requirements include the following: lines must begin and end at nodes, lines must connect to each other at nodes, lines do not extend through nodes, left and right areas are defined for each line element and are consistent throughout the file, and lines representing the limits of the file (neatline) are free of gaps. Completeness_Report: The completeness of the data is unknown but should be consistent with the level of information normally shown on U.S. Geological Survey 1:24,000-scale topographic maps. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The updated sections (mainly around Kolonia and Sokehs) are accurate within a few meters, the other areas are accurate within about 20-30 meters. Quantitative_Horizontal_Positional_Accuracy_Assessment: Horizontal_Positional_Accuracy_Explanation: Visual comparison with WorldView-3 satellite imagery. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Title: U.S. Geological Survey Digital Line Graph Online_Linkage: https://earthexplorer.usgs.gov/ Source_Scale_Denominator: 24000 Type_of_Source_Media: None Source_Citation_Abbreviation: DLG Process_Step: Process_Description: Convert original DLG files (downloaded from EarthExplorer) to shapefiles: area, polyline, and point. Process_Date: 20160526 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Drew Decker Contact_Position: National Map Liaison for Pacific Region Contact_Address: Address_Type: mailing and physical Address: 4165 Spruance Road City: San Diego State_or_Province: CA Postal_Code: 92101 Country: US Contact_Voice_Telephone: 619-225-6430 Contact_Electronic_Mail_Address: ddecker@usgs.gov Process_Step: Process_Description: 1. Projected to WGS84 UTM zone 57N; 2. Shifted dataset about 15.5 meters W to match WorldView-3 imagery (WV-3) better; 3. Extracted reef polygons; 4. Deleted neatlines; 5. Cleaned polygons using ET GeoWizard tools; 6. Updated polygons around the airport and adjusted dataset to new shoreline (phn_shoreline); 7. Formatted attribute table and added fields (name, source, etc). Process_Date: 20170121 Source_Produced_Citation_Abbreviation: Pohnpei Shoreline Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: University of Guam Contact_Person: Maria Kottermair Contact_Position: Geospatial Coordinator Contact_Electronic_Mail_Address: mariakottermair@triton.uog.edu Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Complete chain Point_and_Vector_Object_Count: 792 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: phn_coral_reef Attribute: Attribute_Label: FID 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: Type Attribute: Attribute_Label: Area_m2 Attribute_Definition: Area in square meters Attribute: Attribute_Label: Area_ac Attribute_Definition: Area in acres Attribute: Attribute_Label: Source Attribute_Definition: Source of original dataset. Attribute: Attribute_Label: Notes Overview_Description: Entity_and_Attribute_Detail_Citation: The USGS document Standards for Digital Line Graphs, Part 3: Attribute Codes, contains a detailed description of each attribute code and a reference to the associated map symbols on the map source materials. The document is available at http://rockyweb.cr.usgs.gov/nmpstds/acrodocs/dlg-3/3dlg0798.pdf. Other DLG Standards are available from http://rockyweb.cr.usgs.gov/nmpstds/dlgstds.html. Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: Island Research & Education Initiative (iREi) Contact_Address: Address_Type: mailing Address: P.O. Box PS 303 City: Palikir State_or_Province: Pohnpei Postal_Code: 96941 Country: FM Contact_Voice_Telephone: 691.320.5212 Contact_Electronic_Mail_Address: irei@islandresearch.org Distribution_Liability: See access and use constraints information. Metadata_Reference_Information: Metadata_Date: 20170715 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: University of Guam Contact_Person: Maria Kottermair Contact_Position: Geospatial Coordinator Contact_Electronic_Mail_Address: mariakottermair@triton.uog.edu Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time