Metadata Sample for 2014 Cedar River Delivery 2

Metadata extracted from 2014 Cedar River Delivery 2 bare earth grid q47121c41be

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Quantum Spatial
Publication_Date: 20140909
Title: q47121c41be
Geospatial_Data_Presentation_Form: raster digital data
Description:
Abstract:
The bare earth digital elevation model (DEM) represents the earth's surface with all vegetation and human-made structures removed. It is derived from NIR LiDAR data using TIN processing of the ground point returns. Some elevation values have been interpolated across areas in the ground model where there is no elevation data (e.g. over water, under dense vegetation). The horizontal datum for this dataset is NAD83 (HARN), the vertical datum is NAVD88, Geoid 03, and the data is projected in Washington State Plane North. Units are in US Survey Feet. Quantum Spatial collected the Cedar River Watershed LiDAR data for the Puget Sound LiDAR Consortium between 10/29/13 and 07/08/14.
Purpose:
Provide high resolution terrain elevation data from the Cedar River Watershed LiDAR dataset.
Supplemental_Information:
This data is assembled by 1/4th USGS Quadrangles and projected in Washington State Plane North.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20131029
Ending_Date: 20140708
Currentness_Reference: Cedar River Watershed LiDAR
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -121.500550
East_Bounding_Coordinate: -121.437208
North_Bounding_Coordinate: 47.355306
South_Bounding_Coordinate: 47.312171
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword:
LiDAR, Light Detection and Ranging, high-resolution, elevation data, topography, bare earth, DEM, digital elevation model
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Categories
Theme_Keyword: elevation
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Washington
Place_Keyword: Snohomish County, King County
Access_Constraints: None
Use_Constraints:
In some areas of heavy vegetation or forest cover, there may be relatively few ground points in the LiDAR data. TINing the points produces large triangles and hence the elevations may be less accurate within such areas. Elevation values for open water surfaces should be considered approximate due to the increase of laser noise seen over water, frequent lack of returns, and the overall dynamic nature of water.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Puget Sound LiDAR Consortium
Contact_Person: Christy Lam
Contact_Address:
Address_Type: mailing
Address: 1011 Western Ave, Suite 500
City: Seattle
State_or_Province: Washington
Postal_Code: 98104
Country: US
Contact_Voice_Telephone: 206-971-3283
Contact_Electronic_Mail_Address: clam@psrc.org
Data_Set_Credit: Puget Sound LiDAR Consortium
Native_Data_Set_Environment:
Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.2.2.3552
Data_Quality_Information:
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 0.125 ft (0.038 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.
Positional_Accuracy:
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
The Root Mean Square Error (RMSE) of the vertical accuracy of this dataset is 0.093 ft (0.028 m). Please see the LiDAR data report for a discussion of the statistics related to this dataset.
Quantitative_Vertical_Positional_Accuracy_Assessment:
Vertical_Positional_Accuracy_Value: 0.093 ft (0.028 m)
Vertical_Positional_Accuracy_Explanation:
Accuracy was assessed using 4093 ground survey RTK (real time kinematic) points.
Lineage:
Process_Step:
Process_Description:
Acquisition. Quantum Spatial collected the Cedar River Watershed Delivery 2 LiDAR data between 10/29/13 and 07/08/14. The survey used a Leica ALS60 laser system mounted in a Partenavia, and a Leica ALS70 laser system also mounted in a Partenavia. Data was collected using a single pulse flight plan for the majority of the missions, and a multi pulse flight plan between 12/16/13 and 12/19/13. Ground level GPS and aircraft IMU were collected during the flight.
Leica ALS60 Instrument Parameters: 10/29/2013 - 10/30/2013, 11/01/2013, 11/03/2013 - 11/04/2013 Beam diameter: 26 cm, Pulse rate: 85-93.3 kHz, Maximum returns: 4, Speed: 105 knots, Overlap: 75 %, Laser power: 22 %, Field of view (FOV): 28°, Beam wavelength: 1064 nm, Frequency of GPS sampling: 2 Hz, Frequency of IMU sampling: 200 Hz, Swath width: 549 m, AGL: 1,100 m, Average pulse density: 8
Leica ALS70 Instrument Parameters: 12/03/2013 - 12/05/2013 Beam diameter: 30 cm, Pulse rate: 201-209.4 kHz, Maximum returns: 4, Speed: 105 knots, Overlap: 63 %, Laser power: 63.8 %, Field of view (FOV): 30°, Beam wavelength: 1064 nm, Frequency of GPS sampling: 2 Hz, Frequency of IMU sampling: 200 Hz, Swath width: 697 m, AGL: 1,300 m, Average pulse density: 8
Leica ALS60 Instrument Parameters: 12/11/2013 - 12/12/2013 Beam diameter: 37 cm, Pulse rate: 165-175 kHz, Maximum returns: 4, Speed: 105 knots, Overlap: 63 %, Laser power: 16.7 %, Field of view (FOV): 21°, Beam wavelength: 1064 nm, Frequency of GPS sampling: 2 Hz, Frequency of IMU sampling: 200 Hz, Swath width: 416 m, AGL: 900 m, Average pulse density: 8
Leica ALS60 Instrument Parameters: 12/16/2013 Beam diameter: 32 cm, Pulse rate: 152 kHz, Maximum returns: 4, Speed: 105 knots, Overlap: 63 %, Laser power: 58 %, Field of view (FOV): 24°, Beam wavelength: 1064 nm, Frequency of GPS sampling: 2 Hz, Frequency of IMU sampling: 200 Hz, Swath width: 595 m, AGL: 1,400 m, Average pulse density: 8
Leica ALS70 Instrument Parameters: 02/03/2014 - 02/04/2014 Beam diameter: 23 cm, Pulse rate: 265-275.6 kHz, Maximum returns: 4, Speed: 120 knots, Overlap: 63 %, Laser power: 49 %, Field of view (FOV): 30°, Beam wavelength: 1064 nm, Frequency of GPS sampling: 2 Hz, Frequency of IMU sampling: 200 Hz, Swath width: 536 m, AGL: 1,000 m, Average pulse density: 8
Leica ALS70 Instrument Parameters: 02/05/2014 - 02/07/2014 Beam diameter: 30 cm, Pulse rate: 201-209.4 kHz, Maximum returns: 4, Speed: 105 knots, Overlap: 63 %, Laser power: 63.8 %, Field of view (FOV): 30°, Beam wavelength: 1064 nm, Frequency of GPS sampling: 2 Hz, Frequency of IMU sampling: 200 Hz, Swath width: 697 m, AGL: 1,300 m, Average pulse density: 8
Leica ALS70 Instrument Parameters: 06/22/2013 - 06/23/2014, 06/30/2014, 07/02/2014, 07/05/2014 - 07/08/2014 Beam diameter: 30 cm, Pulse rate: 215.2 kHz, Maximum returns: 4, Speed: 110 knots, Overlap: 63 %, Laser power: 68.6 %, Field of view (FOV): 28°, Beam wavelength: 1064 nm, Frequency of GPS sampling: 2 Hz, Frequency of IMU sampling: 200 Hz, Swath width: 648 m, AGL: varied m, Average pulse density: 8
Process_Date: 20140708
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 using ALS Post Processor and IPAS TC software 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 using ALS postprocessing software, 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. TIN processing of the ground point returns was used to create this bare earth DEM.
Process_Date: 20140909
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Grid Cell
Row_Count: 5202
Column_Count: 5193
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: NAD 1983 HARN StatePlane Washington North FIPS 4601 Feet
Lambert_Conformal_Conic:
Standard_Parallel: 47.5
Standard_Parallel: 48.73333333333333
Longitude_of_Central_Meridian: -120.8333333333333
Latitude_of_Projection_Origin: 47.0
False_Easting: 1640416.666666667
False_Northing: 0.0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.000000026366619998441372
Ordinate_Resolution: 0.000000026366619998441372
Planar_Distance_Units: foot_us
Geodetic_Model:
Horizontal_Datum_Name: D North American 1983 HARN
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: Puget Sound LiDAR Consortium
Contact_Person: Christy Lam
Contact_Address:
Address_Type: mailing
Address: 1011 Western Ave, Suite 500
City: Seattle
State_or_Province: Washington
Postal_Code: 98104
Country: US
Contact_Voice_Telephone: 206-971-3283
Contact_Electronic_Mail_Address: clam@psrc.org
Distribution_Liability:
Please contact the Puget Sound LiDAR Consortium for information regarding the use of this data.
Metadata_Reference_Information:
Metadata_Date: 20141218
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Quantum Spatial
Contact_Address:
Address_Type: mailing and physical
Address: 517 SW 2nd St., Suite 400
City: Corvallis
State_or_Province: OR
Postal_Code: 97333
Country: US
Contact_Voice_Telephone: 541-752-1204
Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Generated by mp version 2.9.12 on Thu Dec 18 09:08:23 2014