Identification_Information: Citation: Citation_Information: Originator: Joel E. Robinson Publication_Date: 2012 Title: Digital topographic map of Crater Lake National Park, Oregon: based on the LiDAR survey of August-September 2010 and bathymetric survey of July 2000 Geospatial_Data_Presentation_Form: raster digital data Series_Information: Series_Name: Data Series Issue_Identification: DS-716 Publication_Information: Publication_Place: Reston, Virginia Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/ds/716 Description: Abstract: Crater Lake partially fills the caldera that formed approximately 7,700 years ago during the eruption of a 12,000-foot volcano known as Mount Mazama. The caldera-forming or climactic eruption of Mount Mazama devastated the surrounding landscape, left a thick deposit of pumice and ash in adjacent valleys, and spread a blanket of volcanic ash as far away as southern Canada. Because the Crater Lake region is potentially volcanically active, knowledge of past events is important to understanding hazards from future eruptions. Similarly, because the area is seismically active, documenting and evaluating geologic faults is critical to assessing hazards from earthquakes. The USGS used American Recovery and Reinvestment Act of 2009 funds to collaborate with the Crater Lake National Park (NPS), the Federal Highway Administration, and the Oregon Department of Geology and Mineral Industries-led Oregon LiDAR Consortium to contract with Watershed Sciences, Inc. to collect 308 square miles of high-precision airborne LiDAR (Light Detection And Ranging) data. These data provide a digital map of the ground surface beneath forest cover with average resolution of 1.6 laser returns/m2 and vertical and horizontal accuracies of ±5 cm. This LiDAR dataset is mosaiced with bathymetry of the 1947.2±3.9 ft (593.5±1.2 m) deep Crater Lake. A collaborative effort between the USGS, the NPS, and the Center for Coastal and Ocean Mapping at the University of New Hampshire collected high-resolution multibeam sonar in 2000. The effort collected 16 million soundings using an EM1002 system owned and operated by C&C Technologies, Inc. These data will contribute to monitoring of natural hazards, and the study of regional geology, volcanic landforms, and landscape modification during and after the next major volcanic eruption here at Crater Lake or elsewhere globally. Purpose: This dataset provides a single mosaic of the LiDAR and multibeam bathymetry data from Crater Lake and vicinity to contribute to monitoring of natural hazards, and the study of regional geology, volcanic landforms, and landscape modification during and after the next major volcanic eruption. Supplemental_Information: The multibeam bathymetry data from Gardner and Dartnell, 2001 (DDS-72) and can be downloaded from [http://pubs.usgs.gov/dds/dds-72/site/data.htm]. Bathymetry data resampled to 1-meter bin spacing to match LiDAR data. No data values between LiDAR and Bathymetric surveys are areas of shallow water were bathymetric data were not collected. Time_Period_of_Content: Time_Period_Information: Multiple_Dates/Times: Single_Date/Time: Calendar_Date: 201008 Single_Date/Time: Calendar_Date: 200007 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -122.309796 East_Bounding_Coordinate: -121.957706 North_Bounding_Coordinate: 43.095292 South_Bounding_Coordinate: 42.764779 Keywords: Theme: Theme_Keyword_Thesaurus: none Theme_Keyword: Mount Mazama Theme_Keyword: Crater Lake Theme_Keyword: LiDAR Theme_Keyword: Multibeam sonar Theme_Keyword: Topography Theme_Keyword: Bathymetry Theme_Keyword: volcanic landforms Place: Place_Keyword_Thesaurus: none Place_Keyword: Crater Lake National Park Place_Keyword: Cascade Range Place_Keyword: Oregon Place_Keyword: USA Access_Constraints: None Use_Constraints: This database, identified as DS-716, 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. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Joel E. Robinson Contact_Organization: U.S. Geological Survey 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: 650.523.5322 Contact_Electronic_Mail_Address: jrobins@usgs.gov Data_Set_Credit: The USGS used American Recovery and Reinvestment Act of 2009 funds to collaborate with the Crater Lake National Park (NPS), the Federal Highway Administration, and the Oregon Department of Geology and Mineral Industries-led Oregon LiDAR Consortium to contract with Watershed Sciences, Inc. Thank you to Ian Madin for coordinating all of DOGMI's efforts in collecting these data. Security_Information: Security_Classification_System: none Security_Classification: Unclassified Security_Handling_Description: none Native_Data_Set_Environment: Microsoft Windows Server 2003 Version 5.2 (Build 3790) Service Pack 2; ESRI ArcGIS 10.0.0.2414 Data_Quality_Information: Logical_Consistency_Report: This is a raster grid file and does not contain topologic relationships. Raster file contains NULL values. Completeness_Report: These data completely describe the topographic and bathmetric surface of Crater Lake and vicinity. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: LiDAR returns located within ±0.05 meters. Sonar soundings located within ±0.5 meters Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: LiDAR elevations accurate within ± 0.037 meters. Bathymetry depths accurate to within 0.2% of water depth. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: James V. Gardner Originator: Peter Dartnell Publication_Date: 2001 Title: 2000 Multibeam sonar survey of Crater Lake, Oregon - Data, GIS, images, and movies Geospatial_Data_Presentation_Form: ArcInfo GRID Series_Information: Series_Name: Digital Data Series Issue_Identification: DDS-72 Publication_Information: Publication_Place: Menlo Park Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/dds/dds-72/index.htm Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2000 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Gardner and Dartnell, 2001 Source_Contribution: Bathymetric data Process_Step: Process_Description: AIRCRAFT SURVEY--Watershed Sciences, Inc. used Leica LiDAR ALS60 sensors mounted in a Cessna Caravan 208B and a Partenavia P-68, two ALS50 Phase II sensors co-mounted in a separate Cessna Caravan 208B for the LiDAR survey. The Leica systems were set to acquire greater or equal to 83,000 laser pulses per second, a 83 kHz pulse rate with up to four range measurements per pulse. Opposing flight lines with 50% side-lap were flown at 900 (ALS60) and 1300 (ALS50) meters above ground level (AGL) capturing a scan angle of ±14¼ and ±13¼ from nadir respectively, for an average native density (number of pulses emitted by the LiDAR system) of greater or equal to 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 the each monument to confirm antenna height measurements and reported positional accuracy. After the airborne survey, the static GPS data are 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. After data collection, bare earth point locations from LAS data files were loaded in to an ESRI Multipoint feature class. Multipoint feaure class projected from original NAD_1983_HARN_Lambert_Conformal_Conic (Feet) to NAD_1983_UTM_Zone10N (Meters), and elevation values converted from feet to meters. The new feature class was loaded in to an ESRI Terrain format. Using a natural neighbors algorithm, a one-meter ESRI GRID format was calculated from the Terrain. Please see included Crater Lake delivery and acceptance reports for a more detailed description of the data collection and quality assurance. BATHYMETRY SURVEY--C&C Technologies, Inc. used an EM1002 system installed aboard the 26-ft Surf Surveyor for the Crater Lake survey. The Simrad EM1002 system operates at frequencies of 98 kHz (inner ±50 degree swath centered at nadir) and 93 kHz (the outer ±20 degree) from a semi-circular transducer mounted on the forward edge of the keel. The system was designed to operate in several modes through a range of depths from 5 to approximately 800-m. The shallow (ultrawide) mode, used to maximum depths of about 200 m, forms 111 receive beams with a spacing of 2 degrees distributed across track and 2 degrees wide along track. The beam geometry can generate up to a 150 degree swath that can cover as much as 7.4 times the water depth. The wide mode is used for depths between 150 and 400 m, and the deep mode is used for depths of greater than 400 m. There are options within each mode for beam distribution (equiangular or equidistant) and pulse lengths (0.2, 0.7, and 2 ms). Process_Date: 2012 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Joel E. Robinson Contact_Position: Geologist Contact_Address: Address_Type: mail 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)329-5203 Contact_Electronic_Mail_Address: jrobins@usgs.gov Contact_Instructions: please contact via e-mail Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Pixel Row_Count: 32789 Column_Count: 37481 Vertical_Count: 1 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9996 Longitude_of_Central_Meridian: -123.0 Latitude_of_Projection_Origin: 0.0 False_Easting: 500000.0 False_Northing: 0.0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000000002220024164500956 Ordinate_Resolution: 0.000000002220024164500956 Planar_Distance_Units: Meter Geodetic_Model: Horizontal_Datum_Name: D North American 1983 Ellipsoid_Name: GRS 1980 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257222101 Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S Geological Survey Contact_Address: Address_Type: mailing address Address: Box 25286 Address: Denver Federal Center 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: Downloadable Data Distribution_Liability: This database has been approved for release and publication by the Director of the U.S. Geological Survey (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: ESRI GRID Raster Format_Version_Date: 20100124 Format_Specification: ESRI GRID Raster File_Decompression_Technique: WinZip Transfer_Size: 3024363 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/ds/716 Fees: free Metadata_Reference_Information: Metadata_Date: 2012 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: mail 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)329-5203 Contact_Electronic_Mail_Address: jrobins@usgs.gov Contact_Instructions: please contact via e-mail Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998