Identification_Information: Citation: Citation_Information: Originator: DGGS Staff Publication_Date: 2013 Title: Elevation Datasets of Alaska Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: Digital Data Series Issue_Identification: DDS 4 Publication_Information: Publication_Place: Fairbanks, AK, USA Publisher: Alaska Division of Geological & Geophysical Surveys Online_Linkage: http://dx.doi.org/10.14509/25239 Online_Linkage: http://maps.dggs.alaska.gov/elevationdata/ Description: Abstract: This interactive map was designed to view known public-domain elevation datasets (LiDAR and InSAR) in Alaska. The map offers zoom and scroll options, and multiple base map layers. We provide an easy point and click interface to show data originators and, when available, a link to download the digital data. Users are also able to bookmark and share areas of interest. DGGS is actively developing a comprehensive repository of Alaska's public-domain elevation data. The application will be periodically updated to incorporate our complete collection. Purpose: In support of geologic mapping and hazards evaluation the Alaska Division of Geological & Geophysical Surveys (DGGS) is acquiring and compiling public-domain elevation datasets throughout Alaska. We have compiled an interactive map to provide the public with an accurate, user-friendly, reference-based inventory of this data. This resource is intended to facilitate planning and research by providing simple and quick means of visualizing structure locations and characteristics. Users must recognize original collection resolution limitations when zooming in farther than the mapped resolution for a given dataset and treat resulting visual representations with appropriate caveats. Supplemental_Information: This FGDC compliant metadata file describes an interactive map interface. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2013 Currentness_Reference: ground condition Status: Progress: in work Maintenance_and_Update_Frequency: irregular Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: 167 East_Bounding_Coordinate: -129 North_Bounding_Coordinate: 72 South_Bounding_Coordinate: 46 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Theme_Keyword: Aerial Geology Theme_Keyword: Geology Theme_Keyword: Geomorphology Theme_Keyword: Geologic Hazards Theme_Keyword: Remote Sensing Theme_Keyword: Shaded Relief Theme_Keyword: Digital Elevation Model Theme_Keyword: Hazards Theme_Keyword: InSAR Theme_Keyword: LiDAR Theme_Keyword: LiDAR Intensity Image Theme_Keyword: Hillshade Image Theme_Keyword: Digital Surface Model (DSM) Theme_Keyword: Raster Image Theme_Keyword: Web Map Service Theme_Keyword: Alaska Statewide Maps Place: Place_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Place_Keyword: Alaska, State of Access_Constraints: This report, map, and/or dataset is available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below). Use_Constraints: Any hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. The user specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. The State of Alaska makes no express or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Alaska Division of Geological & Geophysical Surveys Contact_Position: GIS Manager Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: (907)451-5020 Contact_Electronic_Mail_Address: dggsgis@alaska.gov Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays Data_Set_Credit: This work was supported by the State of Alaska's General Fund. Cross_Reference: Citation_Information: Originator: Alaska Division of Geological & Geophysical Surveys Publication_Date: 2013 Title: Alaska Division of Geological & Geophysical Surveys Publications Catalog - keyword: Lidar Geospatial_Data_Presentation_Form: database Online_Linkage: http://www.dggs.alaska.gov/pubs/keyword/lidar Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: For the purpose of creating an FGDC (CSDGM) compliant metadata file, we consider the attributes of this application to be the underlying base layer maps and data layers. The relative accuracy of the base layers is entirely determined by the data provider and varies by location and scale. The base layer options may change over time as new or better sources become available. The relative accuracy of the elevation data varies by source and is dependent on how it was collected and processed. The intended purpose of this application is to provide a preview of the available datasets. For rigorous scientific use users should obtain the originating data from the cited source. Logical_Consistency_Report: We have used informal "hallway testing" to ensure that the interface functions according to project specifications. The interface and underlying programming may change in response to user feedback. Completeness_Report: The attributes displayed by this application were compiled from various public-domain base layers and elevation datasets. This tool is not an exhaustive library of all the elevation data that has been collected throughout Alaska. The elevation datasets served by this application were either published by DGGS or other governmental agency or submitted to DGGS with explicit distribution permission. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The data shown in the interactive web map has been reprojected from its native projection into WGS 1984 Web Mercator Auxiliary Sphere (WKID: 3857; Authority: EPSG) for display in a web browser. For information regarding the native projection of the source data, please refer to the metadata supplied with any data downloaded from the interface. Disclaimer: While digital data can be displayed precisely at any scale, data accuracy remains constant. Although the user may increase the displayed scale, uncertainties and errors in raster location remain tied to original collection resolution. Users must recognize these limitations when zooming in farther than the mapped resolution for a given dataset and treat resulting visual representations with appropriate caveats. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Alaska Division of Geological & Geophysical Surveys Publication_Date: 2013 Title: Alaska Division of Geological & Geophysical Surveys Publications Catalog Geospatial_Data_Presentation_Form: database Online_Linkage: http://www.dggs.alaska.gov/pubs/ Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2013 Source_Currentness_Reference: observed Source_Citation_Abbreviation: DGGS Publications Catalog Source_Contribution: provides citation information for the elevation data sources Process_Step: Process_Description: map-based search interface - We built a interactive web map using ArcGIS for Server, javascript, and OpenLayers. Process_Date: 2013 Process_Step: Process_Description: base layer selection - We examined publicly available map base layers that were available at the time of publication and selected those which provided the best overall level of reliability, accuracy, and visual appeal. The base layers provided by the application may be changed if improved options become available. Process_Date: 2013 Process_Step: Process_Description: Elevation data acquisition - DGGS is engaged in an ongoing effort to provide references to public-domain LiDAR and InSAR data that has been collected throughout Alaska. Our publications catalog provides direct links to data purchased by DGGS and data source contact information for data that we have acquired from other agencies. Source_Used_Citation_Abbreviation: DGGS Publications Catalog Process_Date: 2013 Process_Step: Process_Description: LiDAR image generation - The processes used to generate the intensity, shaded relief, and hillshade images will vary according to the originating data. In some locations the LiDAR layers will be derived from comprehensively reviewed LiDAR images, in other cases we may process the classified point cloud data in house to provide an "as is" product. If areas of overlapping data occur we will preferentially display the the higher quality image. Users should refer to the originating source to learn more about the data quality of a given area. Process_Date: 2013 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: raster Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: GS_1984_Web_Mercator_Auxiliary_Sphere Mercator: Standard_Parallel: 0 Longitude_of_Central_Meridian: 0 False_Easting: 0 False_Northing: 0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.00000001 Ordinate_Resolution: 0.00000001 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: D_WGS_1984 Ellipsoid_Name: WGS_1984 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257223563 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: Base Layer Entity_Type_Definition: Map base layers which allow users to select street, terrain, or satellite views of the surrounding data. The base layers provided by the application may be changed if improved options become available. Base layers were selected by DGGS staff and data sources are listed on the application. Entity_Type_Definition_Source: See map Entity_Attribute_Layer_Name: Base Layer Detailed_Description: Entity_Type: Entity_Type_Label: Overlays Entity_Type_Definition: USGS quadrangle boundaries and LiDAR hillshade, shaded relief, and intensity images. Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Entity_Attribute_Layer_Name: Overlays Detailed_Description: Entity_Type: Entity_Type_Label: Web Map Service Entity_Type_Definition: The hillshade images served by this application are also provided as a Web Map Service (WMS), the URLs are available on the application citation page. Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Entity_Attribute_Layer_Name: Web Map Service Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: Alaska Division of Geological & Geophysical Surveys Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: (907)451-5020 Contact_Facsimile_Telephone: (907)451-5050 Contact_Electronic_Mail_Address: dggspubs@alaska.gov Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays Contact_Instructions: Please view our website (http://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible. Resource_Description: DDS 4 Distribution_Liability: The State of Alaska makes no expressed or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: Interactive map and web map service Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://dx.doi.org/10.14509/25239 Network_Resource_Name: http://maps.dggs.alaska.gov/elevationdata/ Fees: Contact DGGS for current pricing Metadata_Reference_Information: Metadata_Date: 20150326 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Alaska Division of Geological & Geophysical Surveys Contact_Position: Metadata Manager Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: (907)451-5020 Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Use_Constraints: If the user has modified the data in any way they are obligated to describe the types of modifications they have performed in the supporting metadata file. User specifically agrees not to imply that changes they made were approved by the Alaska Department of Natural Resources or Division of Geological & Geophysical Surveys. Metadata_Extensions: Online_Linkage: http://www.dggs.alaska.gov/metadata/dggs.ext Profile_Name: dggs metadata extensions