Metadata Sample for 2012 Jefferson-Clallam

Metadata extracted from 2012 Jefferson-Clallam bare earth raster grid q47123h51be

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: WSI
Title: q47123h51be
Geospatial_Data_Presentation_Form: raster digital data
Description:
Abstract:
This dataset represents portions of Jefferson & Clallam counties, Washington. The bare earth digitial elevation models (DEMs) were derived from LiDAR data using TIN processing of the ground point returns which represent the earth's surface elevation with all vegetation and human-made structures removed. The ESRI GRID DEM cell size is 3 feet. The elevation units are in US survey feet. The data has been organized into the USGS 3.75' Quadrangle delineation. 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). WSI collected the LiDAR and created this data set for the Puget Sound LiDAR Consortium and the Federal Emergency Management Agency Region X on 03/23/12-03/25/12, 04/13/12-04/15/12 & 05/07/12.
Purpose:
Provide high resolution terrain elevation and land cover elevation data.
Supplemental_Information:
This data is assembled by 1/4th (3.75') USGS Quadrangles and projected into Washington State Plane South, FIPS 4602, US Survey Feet.
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -124.382775
East_Bounding_Coordinate: -124.121092
North_Bounding_Coordinate: 47.57342
South_Bounding_Coordinate: 47.455879
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: LiDAR
Theme_Keyword: Light detection and ranging
Theme_Keyword: DEM
Theme_Keyword: digital elevation model
Theme_Keyword: bare earth
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Categories
Theme_Keyword: elevation
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Pacific Northwest
Place_Keyword: Washington
Place_Keyword: Jefferson County
Place_Keyword: 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 valid elevation values because few LiDAR points are returned from water surfaces. Triangles were created across water surfaces by interpolating from the nearest land points.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Puget Sound LiDAR Consortium
Contact_Person: Diana Martinez
Contact_Address:
Address_Type: mailing and physical
Address: 1011 Western Ave., Suite 500
City: Seattle
State_or_Province: Washington
Postal_Code: 98104
Contact_Voice_Telephone: 206-971-3052
Contact_Electronic_Mail_Address: dmartinez@psrc.org
Point_of_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
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Federal Emergency Management Agency (FEMA) Region X
Contact_Person: Kelly Stone
Contact_Address:
Address_Type: mailing
Address: 20700 44th Ave. W., Suite 110
City: Lynnwood
State_or_Province: WA
Postal_Code: 98036
Contact_Electronic_Mail_Address: kelly.stone@fema.dhs.gov
Data_Set_Credit:
Puget Sound LiDAR Consortium, Federal Emergency Management Agency Region X
Native_Data_Set_Environment:
Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; ESRI ArcGIS 10.0.3.3600
Data_Quality_Information:
Logical_Consistency_Report:
LiDAR flight lines have been examined to ensure that there was at least 60% sidelap, there are no gaps between flightlines, and overlapping flightlines have consistent elevation values. Shaded relief images have been visually inspected for data errors such as pits, border artifacts, gaps, and shifting. The data was examined at a 1:2000 scale.
Completeness_Report:
LiDAR data has been collected and processed for all areas within the project study area.
Positional_Accuracy:
Vertical_Positional_Accuracy:
Quantitative_Vertical_Positional_Accuracy_Assessment:
Vertical_Positional_Accuracy_Value: RMSE = ADD VALUE
Vertical_Positional_Accuracy_Explanation:
The Root Mean Square Error (RMSE) of the Jefferson/Clallam study area is 0.023 meters. Accuracy was assessed using 1,680 ground survey RTK (real time kinematic) points. Please see LiDAR data report for a discussion of statistics related to these datasets.
Lineage:
Process_Step:
Process_Description:
Acquisition. The LiDAR data was collected between 03/23/12-05/07/12. The survey used a Leica ALS50 phase ii for aquisition between 03/23/12 and 04/15/12 and a Leica ALS60 laser system on 5/7/12. Lasers were mounted in a Cessna Caravan 208B. Data was collected using a multi pulse (MPiA) flight plan and a single pulse (SPiA) 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. Instrument Parameters; Beam diameter: 34 cm (MPiA)/21 cm (SPiA), Pulse rate: 150 kHz (MPiA)/99-105 kHz (SPiA), Maximum returns: 4, Minimum separation between returns: 3.5 m, Laser output power: 63% (MPiA)/63%-65% (SPiA), Minimum return power: 200 kHz, Beam wavelenth: 1064 nm, Frequency of GPS sampling: 2 Hz, Frequency of IMU sampling: 200 Hz, Swath width: 638 m (MPiA)/416 m (SPiA), AGL: 1500 m (MPiA)/900 m (SPiA), Single swath pulse density: 4 , Average pulse density: 8
Process_Step:
Process_Description:
Processing steps: 1. Resolved kinematic corrections for aircraft position data using kinematic aircraft GPS and static ground GPS data. 2. Developed a smoothed best estimate of trajectory (SBET) file that blends post-processed aircraft position with attitude data. Sensor head position and attitude were calculated throughout the survey. The SBET data were used extensively for laser point processing. 3. Calculated laser point position by associating SBET position to each laser point return time, scan angle, intensity, etc. Created raw laser point cloud data for the entire survey in *.las (ASPRS v. 1.2) format. 4. Imported raw laser points into manageable blocks (less than 500 MB) to perform manual relative accuracy calibration and filter for pits/birds. Ground points were then classified for individual flight lines (to be used for relative accuracy testing and calibration). 5. Using ground classified points per each flight line, the relative accuracy was tested. Automated line-to-line calibrations were then performed for system attitude parameters (pitch, roll, heading), mirror flex (scale) and GPS/IMU drift. Calibrations were performed on ground classified points from paired flight lines. Every flight line was used for relative accuracy calibration. 6. Position and attitude data were imported. Resulting data were classified as ground and non-ground points. Statistical absolute accuracy was assessed via direct comparisons of ground classified points to ground RTK survey data. 7. Final version of data was checked for duplicate points using TerraScan software. No duplicate points were found. 8. Bare Earth models were created as a triangulated surface and exported as ArcInfo ASCII grids.
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Pixel
Row_Count: 7786
Column_Count: 5090
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 and physical
Address: 1011 Western Ave., Suite 500
City: Seattle
State_or_Province: Washington
Postal_Code: 98104
Country: USA
Contact_Voice_Telephone: 206-971-3052
Contact_Electronic_Mail_Address: dmartinez@psrc.org
Distribution_Liability: See access and use constraints information.
Metadata_Reference_Information:
Metadata_Date: 20120830
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 2.9.6 on Tue Oct 09 09:08:53 2012