wa_dnr_p3_2015_hh

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Quantum Spatial
Publication_Date: 20151112
Title: wa_dnr_p3_2015_hh
Geospatial_Data_Presentation_Form: raster digital data
Description:
Abstract:
The highest hit digital surface model (DSM) represent the earth's surface elevation with all vegetation and man-made structures included. It was derived from NIR LiDAR data using the highest hit method. Some elevation values have been interpolated across areas in the ground model where there is no elevation data (e.g. over water). Data was processed in reference to NAD83 (CORS96), however the horizontal datum for this dataset is defined as NAD83 (HARN) as the difference is generally small and allows for greater ease of use with data in different datums. The vertical datum is NAVD88, Geoid 03, and the data is projected in Washington State Plane South. Units are in US Survey Feet. Quantum Spatial collected the WADNR P3 LiDAR data for the Puget Sound LiDAR Consortium between 08/28/14 and 03/13/15.
Purpose:
Provide high resolution surface elevation data from the WADNR P3 LiDAR dataset.
Supplemental_Information:
This data is assembled by 1/4th USGS Quadrangle and projected in Washington State Plane South.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20140828
Ending_Date: 20150313
Currentness_Reference: WADNR P3
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -121.730620
East_Bounding_Coordinate: -120.979140
North_Bounding_Coordinate: 46.139227
South_Bounding_Coordinate: 45.678895
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: LiDAR
Theme_Keyword: Light detection and ranging
Theme_Keyword: highest hit
Theme_Keyword: vegetation
Theme_Keyword: man-made structures
Theme_Keyword: digital surface model
Theme_Keyword: DSM
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Categories
Theme_Keyword: elevation
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Washington
Access_Constraints: None
Use_Constraints:
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
Data_Set_Credit: Puget Sound LiDAR Consortium
Native_Data_Set_Environment:
Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.3.1.4959
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 average line to line relative accuracy for this dataset is 0.156 ft (0.048m). 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 Fundamental Vertical Accuracy (FVA) of this dataset, tested at 95% confidence level is 0.289 ft (0.088 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: 0.289 ft (0.088 m)
Vertical_Positional_Accuracy_Explanation:
Fundamental Vertical Accuracy was assessed using 142 ground check points. These check points were not used in the calibration or post processing of the LiDAR point cloud data.
Lineage:
Process_Step:
Process_Description:
Acquisition. Quantum Spatial collected the WADNR P3 LiDAR data between 08/28/15 and 03/13/15. The survey utilized a Leica ALS 70, Leica ALS 80, and Optec Orion H laser system mounted in a Cessna Grand Caravan. Near nadir scan angles were used to increase penetration of vegetation to ground surfaces. Ground level GPS and aircraft IMU were collected during the flight.
Process_Date: 20150309
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. The highest hit algorithm was used to create this highest hit DSM.
Process_Date: 20150731
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Grid Cell
Row_Count: 2777
Column_Count: 1508
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: NAD 1983 HARN StatePlane Washington South FIPS 4602 Feet
Lambert_Conformal_Conic:
Standard_Parallel: 45.83333333333334
Standard_Parallel: 47.33333333333334
Longitude_of_Central_Meridian: -120.5
Latitude_of_Projection_Origin: 45.33333333333334
False_Easting: 1640416.666666667
False_Northing: 0.0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.000000026454105572781834
Ordinate_Resolution: 0.000000026454105572781834
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
Distribution_Liability:
Please contact the Puget Sound LiDAR Consortium for information regarding the use of this data.
Metadata_Reference_Information:
Metadata_Date: 20151210
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 10 15:15:47 2015