Identification_Information: Citation: Citation_Information: Originator: Southerland, L.E. Originator: Kinsman, N.E.M. Publication_Date: 2014 Title: Lidar data for the community of Golovin, Alaska Geospatial_Data_Presentation_Form: report and digital data Series_Information: Series_Name: Raw Data File Issue_Identification: RDF 2014-20 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 23 p. Online_Linkage: http://dx.doi.org/10.14509/29127 Description: Abstract: This publication presents lidar data collected over the community of Golovin, on the southern coast of the Seward Peninsula in western Alaska (fig. 1). The original data were collected on November 5, 2013, by Quantum Spatial. The complete, classified lidar dataset was purchased by the State of Alaska Division of Geological & Geophysical Surveys in 2014 in support of coastal vulnerability mapping efforts. For the purposes of open access to lidar datasets in coastal regions of Alaska, this collection is being released as a Raw Data File with an open end-user license. The horizontal datum for this dataset is NAD83 (CORS96), the vertical datum is NAVD88, Geoid 09, and it is projected in UTM Zone 3 North. Units are in Meters. Data have been classified to Ground (class 2) and Default (class 1). Quantum Spatial collected the Golovin LiDAR data on 11/05/2013. Purpose: For the purposes of open access to lidar datasets in coastal regions of Alaska, this collection is being released as a Raw Data File with an open end-user license. Supplemental_Information: The DGGS metadata standard extends the FGDC standard to include elements that are required to facilitate our internal data management. These elements, referred to as "layers," group and describe files that have intrinsic logical or topological relationships and correspond to subdirectories within the data distribution package. The metadata layer provides an FGDC metadata file and may include other documentation files. Attribute information for each data layer is described in this metadata file under the "Entity_and_Attribute_Information" section. Data layer contents: >point cloud data - all returns - classified: Classified (ASPRS standard) LiDAR values for all returns (distributed in LAZ format), data have been classified to Ground (class 2) and Default (class 1). >las-index: polygons that serve as an index to the spatial location and extent of each point cloud (LAS) bin >border: polygon that encompasses the maximum geographic extent of the data observations >dsm: digital surface model (first return), 1 meter resolution, single band raster >dsm_hs: hillshade of digital surface model (first return), 1 meter resolution, three band raster >dtm: digital terrain model (bare earth), 1 meter resolution, single band raster >dtm_hs: hillshade of digital terrain model (first return), 1 meter resolution, three band raster Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20131105 Ending_Date: 2014 Currentness_Reference: ground condition Status: Progress: complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -163.048528 East_Bounding_Coordinate: -162.959765 North_Bounding_Coordinate: 64.557070 South_Bounding_Coordinate: 64.537851 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Theme_Keyword: Coastal Theme_Keyword: Coastal and River Theme_Keyword: Geomorphology Theme_Keyword: LiDAR Theme_Keyword: LiDAR LAS File Format Theme_Keyword: Point Cloud Data Theme_Keyword: Remote Sensing Theme_Keyword: Surface Theme_Keyword: Topography Theme_Keyword: Digital Surface Model (DSM) Theme_Keyword: Hillshade Image Theme_Keyword: LAS Index Shapefile Theme_Keyword: Raster Image Theme_Keyword: Shaded Relief Place: Place_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Place_Keyword: Golovin Place_Keyword: Solomon Quadrangle Place_Keyword: Seward Peninsula Temporal: Temporal_Keyword_Thesaurus: Walker, J.D., Geissman, J.W., Bowring, S.A, and Babcock, L.E., comp., 2012, Geologic Time Scale v. 4.0: Geological Society of America Temporal_Keyword: Holocene 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 publication is funded with qualified outer continental shelf oil and gas revenues through the Coastal Impact Assistance Program, U.S. Fish and Wildlife Service, U.S. Department of the Interior. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the opinions or policies of the U.S. Government. Mention of trade names or commercial products does not constitute their endorsement by the U.S. Government. Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Accuracy statements are based on areas of moderate terrain. Diminished accuracies are to be expected in areas of extreme terrain and dense vegetation. The accuracy of each point is expected to meet the vertical accuracy standard, however, derived products may be less accurate in extreme terrain and dense vegetation due to a lesser number of points defining the bare-earth in these areas. Questions regarding data accuracy can be best answered by Quantum Spatial (Anchorage, Alaska) staff. Logical_Consistency_Report: Shaded relief images have been visually inspected for data errors such as pits, border artifacts, and shifting. LiDAR flight lines have been examined to ensure consistent elevation values across overlapping flight lines. The Root Mean Square Error (RMSE) of line to line relative accuracy for this dataset is 0.035 m. Please see the LiDAR data report for a discussion of the statistics related to this dataset. Completeness_Report: LiDAR data has been collected and processed for all areas within the project study area. AKDGGS's area of interest (AOI) was larger in extent than the previous AOI for which the data was acquired. This resulted in small but unavoidable data gaps along the northern boundary and lower point densities in the eastern section of the AOI not specifically targeted during the acquisition. All discernible laser returns from the fall 2013 acquisition were processed to aid AKDGGS in assessing the topographic and geophysical properties of the study area to support storm monitoring. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The Optech Gemini system has a stated horizontal accuracy of 1/5500 x altitude. The Golovin lidar data was flown at 800m AGL resulting in a horizontal accuracy of 15 cm. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: The Root Mean Square Error (RMSE) of the vertical accuracy of this dataset is 0.107 m. Accuracy was assessed using 15 ground survey points. Please see the lidar data report for a discussion of the statistics related to this dataset. The vertical accuracy of the lidar dataset was independently evaluated by DGGS using control points (n=10) that were collected by DGGS during the course of 2012 fieldwork. The standard deviation of the differences between these independent control points and the lidar point-cloud data confirmed the vertical accuracy reported by Quantum Spatial in the 2014 delivery report. Lineage: Process_Step: Process_Description: Acquisition. Quantum Spatial collected the Golovin lidar data on 11/05/2013. The survey used a Optech Gemini laser system mounted in a Piper Navajo. Data was collected using a single pulse flight plan. Ground level GPS and aircraft IMU were collected during the flight. Optech Gemini Instrument Parameters: Beam diameter: 26 cm, Pulse rate: 70 kHz, Maximum returns: 4, Field of view (FOV): 40 degrees, Beam wavelength: 1064 nm, Frequency of GPS sampling: 2 Hz, Frequency of IMU sampling: 200 Hz, AGL: 800 m, Average pulse density: 4 Process_Date: 20131105 Process_Step: Process_Description: 1. Flight lines and data were reviewed to ensure complete coverage of the study area and positional accuracy of the laser points. 2. Laser point return coordinates were computed based on independent data from the lidar system, IMU, and aircraft. 3. The raw lidar file was assembled into flight lines per return with each point having an associated x, y, and z coordinate. 4. Visual inspection of swath to swath laser point consistencies within the study area were used to perform manual refinements of system alignment. 5. Custom algorithms were designed to evaluate points between adjacent flight lines. Automated system alignment was computed based upon randomly selected swath to swath accuracy measurements that consider elevation, slope, and intensities. Specifically, refinement in the combination of system pitch, roll and yaw offset parameters optimize internal consistency. 6. Noise (e.g., pits and birds) was filtered based on known elevation ranges and included the removal of any cycle slips. 7. Using TerraScan and Microstation, ground classifications utilized custom settings appropriate to the study area. 8. The corrected and filtered return points were compared to the RTK ground survey points collected to verify the vertical accuracy. 9. Data were classified to Ground (class 2) and Default (class 1). Process_Date: 20140916 Process_Step: Process_Description: File compression - LAS files were compressed to LAZ format to facilitate online distribution Process_Date: 2014 Process_Step: Process_Description: Digital Surface Model (DSM) - The digital surface model (first returns) was generated from LAS files in ArcGIS using the LASD to Raster Tool. Process_Date: 2014 Process_Step: Process_Description: Digital Terrain Model (DTM) - The digital terrain model (bare earth) was generated from LAS files in ArcGIS using the LASD to Raster Tool after filtering to only use ground points. Process_Date: 2014 Process_Step: Process_Description: Hillshade images were derived from the digital terrain model and digital surface model with Global Mapper and exported as 3 Band GeoTIFFs. Process_Date: 2014 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 3 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -159 Latitude_of_Projection_Origin: 0 False_Easting: 500000.000000 False_Northing: 0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.01 Ordinate_Resolution: 0.01 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6378137 Denominator_of_Flattening_Ratio: 298.257222101 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Datum_Name: NAVD88, derived using GEOID 12A Altitude_Resolution: 0.01 Altitude_Distance_Units: Meters Altitude_Encoding_Method: Explicit elevation coordinate included with horizontal coordinates Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: point_cloud_data Entity_Type_Definition: point cloud data - all returns - classified: Classified (ASPRS standard) LiDAR values for all returns; File format: LAS 1.1, distributed in LAZ format Entity_Type_Definition_Source: Quantum Spatial Entity_Attribute_Layer_Name: point cloud data - all returns - classified Detailed_Description: Entity_Type: Entity_Type_Label: rdf2014-20-las-index Entity_Type_Definition: polygons that serve as an index to the spatial location and extent of each point cloud (LAS) bin; File format: shapefile Entity_Type_Definition_Source: Quantum Spatial Entity_Attribute_Layer_Name: las-index Attribute: Attribute_Label: NAME Attribute_Definition: Bin identification Attribute_Definition_Source: Quantum Spatial Attribute_Domain_Values: Unrepresentable_Domain: Alpha numeric values that uniquely identify each LAS bin Detailed_Description: Entity_Type: Entity_Type_Label: rdf2014-20-border Entity_Type_Definition: polygon that encompasses the maximum geographic extent of the data observations; File format: shapefile Entity_Type_Definition_Source: Quantum Spatial Entity_Attribute_Layer_Name: border Detailed_Description: Entity_Type: Entity_Type_Label: rdf_2014_20_dsm Entity_Type_Definition: digital surface model (first return), 1 meter resolution, single band raster Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Entity_Attribute_Layer_Name: dsm Detailed_Description: Entity_Type: Entity_Type_Label: rdf_2014_20_dsm_hs Entity_Type_Definition: hillshade of digital surface model (first return), 1 meter resolution, three band raster Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Entity_Attribute_Layer_Name: dsm_hs Detailed_Description: Entity_Type: Entity_Type_Label: rdf_2014_20_dtm Entity_Type_Definition: digital terrain model (bare earth), 1 meter resolution, single band raster Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Entity_Attribute_Layer_Name: dtm Detailed_Description: Entity_Type: Entity_Type_Label: rdf_2014_20_dtm_hs Entity_Type_Definition: hillshade of digital terrain model (first return), 1 meter resolution, three band raster Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Entity_Attribute_Layer_Name: dtm_hs 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: RDF 2014-20 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: Non-digital_Form: DGGS publications are available as free online downloads or you may purchase paper hard-copies or digital files on CD/DVD or other digital storage media by mail, phone, fax, or email from the DGGS Fairbanks office. To purchase this or other printed reports and maps, contact DGGS by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). Payment accepted: Cash, check, money order, VISA, or MasterCard. Turnaround time is 1-2 weeks unless special arrangements are made and an express fee is paid. Shipping charge will be the actual cost of postage and will be added to the total amount due. Contact us for the exact shipping amount. Fees: Contact DGGS for current pricing Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: LAS files Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://dx.doi.org/10.14509/29127 Fees: Free download Metadata_Reference_Information: Metadata_Date: 20141212 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