Identification_Information: Citation: Citation_Information: Originator: Joel E. Robinson Publication_Date: 20141031 Title: Digital topographic data based on lidar survey of Mount Shasta Volcano, California, July-September 2010 Geospatial_Data_Presentation_Form: raster digital data Series_Information: Series_Name: Data Series Issue_Identification: DS 852 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/ds/852 Online_Linkage: http://dx.doi.org/10.3133/ds852 Description: Abstract: The most voluminous of the Cascade volcanoes, northern California's Mount Shasta, is a massive compound stratovolcano composed of at least four main edifices constructed over a period of at least 590,000 years. An ancestral Shasta volcano was destroyed by Earth's largest known Quaternary subaerial debris avalanche, which filled Shasta Valley, northwest of the volcano. The Hotlum cone, forming the present summit, and the Shastina lava dome complex, were constructed during the Holocene, as was the southwest flank Black Butte lava dome. As part of the American Recovery and Reinvestment Act (ARRA) of 2009, the U.S. Geological Survey was awarded funding for high-precision airborne lidar (light detection and ranging) data collection at several volcanoes in the Cascade Range. Data collection was arranged by the Oregon Lidar Consortium, administered by the Oregon Department of Geology and Mineral Industries (DOGAMI). The Oregon Lidar Consortium contracted with Watershed Sciences, Inc., to collect 1,220 km2 of high-precision airborne lidar data. These data have been used to produce a digital map of the ground surface beneath forest cover with horizontal resolution of 1 m (average of 1.82 ground laser returns/m2) and estimated vertical accuracy of ±4 cm (1 sigma), and horizontal accuracies of ±1.5 cm. These data will contribute to monitoring and description of natural hazards, the study of regional geology and volcanic landforms, and analysis of landscape modification during and after the next volcanic eruption at Mount Shasta. Purpose: This LiDAR data release will contribute to monitoring and description of natural hazards, and the study of regional geology, volcanic landforms, and landscape modification during and after the next major volcanic eruption at Mount Shasta. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20100705 Ending_Date: 20100902 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -122.438774 East_Bounding_Coordinate: -121.888382 North_Bounding_Coordinate: 41.564495 South_Bounding_Coordinate: 41.126339 Keywords: Theme: Theme_Keyword: Light Detection and Ranging Theme_Keyword: LiDAR Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Categories Theme_Keyword: imageryBaseMapsEarthCover Theme_Keyword: geoscientificInformation Place: Place_Keyword: Mount Shasta Volcano Place_Keyword: Dunsmuir Place_Keyword: McCloud Place_Keyword: Mount Shasta City Place_Keyword: Weed Place_Keyword: Siskiyou county Place_Keyword: California Access_Constraints: None Use_Constraints: Uses of this digital data should not violate the spatial resolution of the data. Although the digital form of the data removes the constraint imposed by the scale of a paper map, the detail and accuracy inherent in map scale are also present in the digital data. The LiDAR data was collected with an average of 1.82 ground classified points per square meter, and a ±4 centimeter vertical accuracy. Viewing at scales larger than the data resolution will not yield greater real detail, although it may reveal fine-scale irregularities below the intended resolution of the database. Similarly, where this database is used in combination with other data of higher resolution, the resolution of the combined output will be limited by the lower resolution of these data. Acknowledgment of the U.S. Geological Survey would be appreciated in products derived from these data. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Joel E. Robinson Contact_Position: Geologist Contact_Address: Address_Type: mailing address Address: 345 Middlefield Road Address: MS 910 City: Menlo Park State_or_Province: CA Postal_Code: 94025 Country: USA Contact_Voice_Telephone: 650.329.5322 Contact_Facsimile_Telephone: 650.329.5302 Contact_Electronic_Mail_Address: jrobins@usgs,gov Contact_Instructions: Please contact via e-mail Data_Set_Credit: The USGS used American Recovery and Reinvestment Act of 2009 funds to collaborate with the Oregon Department of Geology and Mineral Industries-led Oregon LiDAR Consortium to contract with Watershed Sciences, Inc. to collect 1,220 square kilometers of high-precision airborne LiDAR (Light Detection And Ranging) data. Security_Information: Security_Classification: Unclassified Native_Data_Set_Environment: Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 2; ESRI ArcCatalog 9.3.1.3000 Data_Quality_Information: Positional_Accuracy: Horizontal_Positional_Accuracy: Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: These data are accurate to 5 centimeters in the z direction. Lineage: Process_Step: Process_Description: AIRCRAFT SURVEY Watershed Sciences, Inc. used Leica LiDAR ALS50 Phase II sensors mounted in a Cessna Caravan 208B. The Leica systems were set to acquire greater than 83,000 laser pulses per second, a 83 kHz pulse rate. Opposing flight lines with greater than or equal to 50% side-lap were flown at 1300 meters above ground level (AGL) capturing a scan angle of ±14 degrees from nadir respectively, for an average native density (number of pulses emitted by the LiDAR system) of greater than 8 points per square meter over terrestrial surfaces. Aircraft position (x, y,z) is recorded twice per second (2 Hz) by an onboard differential GPS unit, and aircraft attitude (pitch, roll and yaw) is measured 200 times per second (200 Hz) from an onboard inertial measurement unit (IMU) to solve for laser point position. All discernible laser returns were processed for the study area, but some types of surfaces, for example dense vegetation or water, may return fewer pulses than the laser originally emitted, and the delivered density may be spatially variable and have a lower density than the native density. GROUND SURVEY Before beginning the airborne survey, control monuments were established within 13 nautical miles of all LiDAR measurement points in the survey area. During the airborne survey, Trimble GPS receivers models R7 and R8 were positioned over either previously established or newly set monuments for static and Real-Time Kinematic (RTK) surveys. The static ground survey location measurements were recorded at 1 Hz frequency. Multiple sessions were collected and processed over each monument to confirm antenna height measurements and reported positional accuracy. After the airborne survey, the static GPS data were processed using triangulation with continuous operation stations (CORS) and checked using the Online Positioning User Service (OPUS) to quantify daily variance. The GPS data records are indexed by time, and were used to correct the continuous onboard aircraft position measurements recorded throughout the mission. Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Grid Cell Row_Count: 48209 Column_Count: 45586 Vertical_Count: 1 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Transverse Mercator Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -123.000000 Latitude_of_Projection_Origin: 0.000000 False_Easting: 500000.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: row and column Coordinate_Representation: Abscissa_Resolution: 1.000000 Ordinate_Resolution: 1.000000 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: D_NAD_1983_CORS96 Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257222 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Datum_Name: North American Vertical Datum of 1988, Geoid03 Altitude_Resolution: 5 meters Altitude_Distance_Units: meters Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Attribute: Attribute_Label: OID 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: Value Attribute: Attribute_Label: Count Overview_Description: Entity_and_Attribute_Overview: Z-values are elevations in meters. No table for floating point files. Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: Denver Federal Center Address: Box 25286 City: Denver State_or_Province: Colorado Postal_Code: 80225-0046 Country: USA Contact_Voice_Telephone: 303.202.4200 Contact_Voice_Telephone: 1.888.ASK.USGS Contact_Facsimile_Telephone: 303.202.4695 Contact_Electronic_Mail_Address: infoservices@usgs.gov Resource_Description: These files are integral to U.S. Geological Survey DS-852 Distribution_Liability: This database, identified as DS-XXX, has been approved for release and publication by the Director of the USGS. Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ArcGrid File_Decompression_Technique: WinZip Transfer_Size: 3.48 GB Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/ds/0852 Metadata_Reference_Information: Metadata_Date: 20140429 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Joel E. Robinson Contact_Position: Geologist Contact_Address: Address_Type: mailing Address: 345 Middlefield Road Address: MS 910 City: Menlo Park State_or_Province: CA Postal_Code: 94025 Country: US Contact_Voice_Telephone: 650.329.5322 Contact_Facsimile_Telephone: 650.329.5302 Contact_Electronic_Mail_Address: jrobins@usgs.gov Contact_Instructions: Please contact via e-mail Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Access_Constraints: none Metadata_Use_Constraints: Uses of this digital data should not violate the spatial resolution of the data. Although the digital form of the data removes the constraint imposed by the scale of a paper map, the detail and accuracy inherent in map scale are also present in the digital data. The LiDAR data was collected with an average of 1.82 ground classified points per square meter, and a ±4 centimeter vertical accuracy. Viewing at scales larger than the data resolution will not yield greater real detail, although it may reveal fine-scale irregularities below the intended resolution of the database. Similarly, where this database is used in combination with other data of higher resolution, the resolution of the combined output will be limited by the lower resolution of these data. Acknowledgment of the U.S. Geological Survey would be appreciated in products derived from these data. Metadata_Security_Information: Metadata_Security_Classification: Unclassified Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile