Metadata Sample for 2013 Hoh

Metadata extracted from 2013 Hoh bare earth raster grid q47123f71be

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: WSI
Publication_Date: 20131018
Title: q47123f71be
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 DEM grid cell size is 3 ft. 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. Horizontal units are in US Survey Feet and vertical units are in U.S. Survey Feet. This data is part of delivery 2. WSI collected the Hoh Watershed LiDAR data for Hoh Tribal Natural Resources through the Puget Sound LiDAR Consortium between 04/14/12 and 07/24/13.
Purpose:
Provide high resolution terrain elevation data from the Hoh Watershed 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: 20120414
Ending_Date: 20130724
Currentness_Reference: Hoh Watershed LiDAR
Status:
Progress: In work
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -123.875934
East_Bounding_Coordinate: -123.861202
North_Bounding_Coordinate: 47.750382
South_Bounding_Coordinate: 47.735467
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: Jefferson County, Clallam 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 are not considered valid elevations because of the dynamic nature of water and the fact that few points are typically returned from water surfaces when using NIR LiDAR.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Puget Sound LiDAR Consortium
Contact_Person: Diana Martinez
Contact_Address:
Address_Type: mailing
Address: 1011 Western Avenue, Suite 500
City: Seattle
State_or_Province: Washington
Postal_Code: 98104
Country: US
Contact_Voice_Telephone: 206-971-3052
Contact_Electronic_Mail_Address: dmartinez@psrc.org
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Hoh Tribal Natural Resources
Contact_Person: Steve Allison
Contact_Address:
Address_Type: unknown
Address: 2483 Lower Hoh Road
City: Forks
State_or_Province: WA
Postal_Code: 98331
Contact_Voice_Telephone: 360 374 5404
Data_Set_Credit:
Puget Sound LiDAR Consortium, Hoh Tribal Natural Resources
Native_Data_Set_Environment:
Microsoft Windows 7 Version 6.1 (Build 7600) ; Esri ArcGIS 10.2.0.3348
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 0.269 ft. 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 in delivery 2.
Positional_Accuracy:
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
The Root Mean Square Error (RMSE) of the vertical accuracy of this dataset is 0.109 ft. 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: 0.109
Vertical_Positional_Accuracy_Explanation:
Accuracy was assessed using 2740 ground survey RTK (real time kinematic) points.
Lineage:
Process_Step:
Process_Description:
Acquisition. WSI collected the Hoh Watershed LiDAR data between 04/14/12 and 07/24/13. The survey used a Leica ALS60 laser system mounted in a Cessna Caravan 208B and a ALS50 laser system mounted in a Partenavia. Data was collected using a single pulse flight plan. 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.
Leica ALS 60 Instrument Parameters (4/14/12, 4/15/12, 4/17/12, 4/19/12, 4/20/12, 4/21/12); Beam diameter: 21 cm, Pulse rate: 196-107.8 kHz, Maximum returns: 4, Speed: 105 knots, Overlap: 60 %, Laser output power: 17% Field of vew (FOV): 28°, Beam wavelenth: 1064 nm, Frequency of GPS sampling: 2 Hz, Frequency of IMU sampling: 200 Hz, Swath width: 449 m AGL: 900 m Average pulse density: 8

Leica ALS 50 Phase II Instrument Parameters (4/15/12, 4/21/12); Beam diameter: 21 cm, Pulse rate: 96-107.8 kHz, Maximum returns: 4, Speed: 105 knots, Overlap: 60 %, Laser output power: 26% Field of vew (FOV): 28°, Beam wavelenth: 1064 nm, Frequency of GPS sampling: 2 Hz, Frequency of IMU sampling: 200 Hz, Swath width: 449 m AGL: 900 m Average pulse density: 8

Leica ALS 50 Phase II Instrument Parameters (10/6/12, 10/7/12, 10/10/12); Beam diameter: 21 cm, Pulse rate: 93-107.8 kHz, Maximum returns: 4, Speed: 105 knots, Overlap: 65 %, Laser output power: 26% Field of vew (FOV): 28°, Beam wavelenth: 1064 nm, Frequency of GPS sampling: 2 Hz, Frequency of IMU sampling: 200 Hz, Swath width: 448 m AGL: 900 m Average pulse density: 8

Leica ALS60 Instrument Parameters (3/31/13, 4/1/13): Beam diameter: 21 cm, Pulse rate: 93 - 107.8 kHz, Maximum returns: 4, Speed: 105 knots, Overlap: 65 %, Laser power: 17 %, Field of vew (FOV): 28°, Beam wavelenth: 1064 nm, Frequency of GPS sampling: 2 Hz, Frequency of IMU sampling: 200 Hz, Swath width: 449 m, AGL: 900 m, Average pulse density: 8

Leica ALS60 Instrument Parameters (6/29/13, 6/30/13): Beam diameter: 21 cm, Pulse rate: 93 - 107.8 kHz, Maximum returns: 4, Speed: 105 knots, Overlap: 65 %, Laser power: 26 %, Field of vew (FOV): 28°, Beam wavelenth: 1064 nm, Frequency of GPS sampling: 2 Hz, Frequency of IMU sampling: 200 Hz, Swath width: 449 m, AGL: 900 m, Average pulse density: 8

Leica ALS60 Instrument Parameters (7/24/13): Beam diameter: 23 cm, Pulse rate: 85-99.2 kHz, Maximum returns: 4, Speed: 105 knots, Overlap: 60 %, Laser power: 28.9 %, Field of vew (FOV): 30°, Beam wavelenth: 1064 nm, Frequency of GPS sampling: 2 Hz, Frequency of IMU sampling: 200 Hz, Swath width: 536 m, AGL: 1000 m, Average pulse density: 8
Process_Date: 20130724
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: 20130828
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Grid Cell
Row_Count: 1767
Column_Count: 1134
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: Diana Martinez
Contact_Address:
Address_Type: mailing
Address: 1011 Western Avenue, Suite 500
City: Seattle
State_or_Province: Washington
Postal_Code: 98104
Country: US
Contact_Voice_Telephone: 206-971-3052
Contact_Electronic_Mail_Address: dmartinez@psrc.org
Distribution_Liability:
Please contact the Puget Sound LiDAR Consortium for information regarding the use of this data.
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Hoh Tribal Natural Resources
Contact_Person: Steve Allison
Contact_Address:
Address_Type: unknown
Address: 2483 Lower Hoh Road
City: Forks
State_or_Province: WA
Postal_Code: 98331
Contact_Voice_Telephone: 360 374 5404
Distribution_Liability:
Please contact the Puget Sound LiDAR Consortium for information regarding the use of this data.
Metadata_Reference_Information:
Metadata_Date: 20131017
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: WSI
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 Tue Nov 26 16:28:58 2013