Metadata Sample for 2009 San Juan County and Lummi Island
Metadata extracted from 2009 San Juan County and Lummi Island bare
earth raster grid be_48122d71
Metadata:
- Identification_Information:
-
- Citation:
-
- Citation_Information:
-
- Originator: Puget Sound LiDAR Consortium
- Originator: Watershed Sciences, Inc.
- Publication_Date: 2009
- Title: be_48122d71
- Geospatial_Data_Presentation_Form: raster
digital data
- Online_Linkage:
\\WINXP\E$\1EDITS_DELIVERABLES\Rasters\Bare_Earth\be_48122d71
- Description:
-
- Abstract:
- The dataset encompasses portions of San Juan and Whatcom
counties in northwest Washington. The bare earth digital elevation
models (DEM) represent the earth's surface with all vegetation and
human-made structures removed. The bare earth DEMs were derived from
LiDAR data using TIN processing of the ground point returns. The DEM
grid cell size is 3 US survey feet. The elevation units are in U.S.
survey feet. Some elevation values have been interpolated across areas
in the ground model where there is no elevation data (e.g. over water,
over dense vegetation).
Watershed Sciences, Inc. collected the LiDAR and created this data set
for the Puget Sound LiDAR Consortium
- Purpose:
- Provide high resolution terrain elevation and land cover
elevation data.
- Supplemental_Information:
- This data is assembled as 1/4 of a 7.5 minute quad and
delivered in the Washington State Plane North HARN, FIPS 4601
projection.
- Time_Period_of_Content:
-
- Time_Period_Information:
-
- Multiple_Dates/Times:
-
- Single_Date/Time:
-
- Calendar_Date: 02/13/2009
- Single_Date/Time:
-
- Calendar_Date: 02/14/2009
- Single_Date/Time:
-
- Calendar_Date: 02/15/2009
- Single_Date/Time:
-
- Calendar_Date: 02/16/2009
- Single_Date/Time:
-
- Calendar_Date: 02/17/2009
- Single_Date/Time:
-
- Calendar_Date: 04/30/2009
- Currentness_Reference: ground condition
- Status:
-
- Progress: Complete
- Maintenance_and_Update_Frequency: None planned
- Spatial_Domain:
-
- Bounding_Coordinates:
-
- West_Bounding_Coordinate: -123.203499
- East_Bounding_Coordinate: -122.576550
- North_Bounding_Coordinate: 49.002583
- South_Bounding_Coordinate: 48.413635
- Keywords:
-
- Theme:
-
- Theme_Keyword_Thesaurus:
- REQUIRED: Reference to a formally registered
thesaurus or a similar authoritative source of theme keywords.
- Theme_Keyword: LiDAR
- Theme_Keyword: Light Detection and Ranging
- Theme_Keyword: DEM
- Theme_Keyword: digital terrain model
- Theme_Keyword: elevation data
- Theme_Keyword: topography
- Theme_Keyword: bare earth
- Theme_Keyword: high-resolution
- Theme_Keyword: bare ground
- Theme_Keyword: DTM
- Place:
-
- Place_Keyword: Washington
- Place_Keyword: Pacific Northwest
- Place_Keyword: Whatcom County
- Place_Keyword: San Juan 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
- Address: 1011 Western Ave Suite 500
- City: Seattle
- State_or_Province: WA
- Postal_Code: 98104-1035
- Country: USA
- Contact_Voice_Telephone: 206-971-3052
- Contact_Facsimile_Telephone:
dmartinez@psrc.org
- Data_Set_Credit: Puget Sound LiDAR Consortium
- Native_Data_Set_Environment:
- Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3;
ESRI ArcCatalog 9.2.6.1500
- Data_Quality_Information:
-
- Logical_Consistency_Report:
- LiDAR flight lines have been examined to ensure that there
was at least 50% 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:
-
- Horizontal_Positional_Accuracy:
-
- Quantitative_Horizontal_Positional_Accuracy_Assessment:
-
- Horizontal_Positional_Accuracy_Explanation:
See LiDAR data report.
- Vertical_Positional_Accuracy:
-
- Quantitative_Vertical_Positional_Accuracy_Assessment:
-
- Vertical_Positional_Accuracy_Value: RMSE
= 0.136 feet
- Vertical_Positional_Accuracy_Explanation:
- The Root Mean Square Error (RMSE) of the data set
is 0.136 feet. Accuracy was assessed using 2644 ground survey (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 February 13th-17th, 2009 and April
30th, 2009. The survey used a Leica ALS50 Pase II laser system mounted
in a Cessna Caravan 208B, and an Optech 3100 laser system mounted in a
Cessna Caravan 208B. 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_Step:
-
- Process_Description:
- Processing.
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 software, IPAS Pro GPS/INS software, REALM survey suite, and
PosPac 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 and REALM software tools, 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 and horizontal
accuracies.
9. Points were output as laser points, TINed and GRIDed surfaces.
- Process_Step:
-
- Process_Description: Metadata imported.
- Process_Date: 20090622
- Process_Time: 15502200
- Spatial_Data_Organization_Information:
-
- Direct_Spatial_Reference_Method: Raster
- Raster_Object_Information:
-
- Raster_Object_Type: Grid Cell
- Row_Count: 7735
- Column_Count: 5257
- Vertical_Count: 1
- Spatial_Reference_Information:
-
- Horizontal_Coordinate_System_Definition:
-
- Planar:
-
- Map_Projection:
-
- Map_Projection_Name: Lambert Conformal
Conic
- Lambert_Conformal_Conic:
-
- Standard_Parallel: 47.500000
- Standard_Parallel: 48.733333
- Longitude_of_Central_Meridian:
-120.833333
- Latitude_of_Projection_Origin:
47.000000
- False_Easting: 1640416.666667
- False_Northing: 0.000000
- Planar_Coordinate_Information:
-
- Planar_Coordinate_Encoding_Method: row
and column
- Coordinate_Representation:
-
- Abscissa_Resolution: 3.000000
- Ordinate_Resolution: 3.000000
- Planar_Distance_Units: survey feet
- Geodetic_Model:
-
- Horizontal_Datum_Name:
D_North_American_1983_HARN
- Ellipsoid_Name: Geodetic Reference System 80
- Semi-major_Axis: 6378137.000000
- Denominator_of_Flattening_Ratio: 298.257222
- Entity_and_Attribute_Information:
-
- Detailed_Description:
-
- Entity_Type:
- Attribute:
-
- Attribute_Label: ObjectID
- Attribute_Definition: Internal feature
number.
- Attribute_Definition_Source: ESRI
- Attribute_Domain_Values:
-
- Unrepresentable_Domain:
- Sequential unique whole numbers that are
automatically generated.
- Attribute:
-
- Attribute_Label: Value
- Attribute:
-
- Attribute_Label: Count
- Distribution_Information:
-
- Distributor:
-
- Contact_Information:
-
- Contact_Organization_Primary:
-
- Contact_Organization: Puget Sound LiDAR
Consortium
- Contact_Person: Diana Martinez
- Contact_Address:
-
- Address: 1011 Western Ave., Suite 500
- City: Seattle
- State_or_Province: WA
- Postal_Code: 98104-1035
- Country: USA
- Contact_Voice_Telephone: 206-971-3052
- Contact_Electronic_Mail_Address:
dmartinez@psrc.org
- Resource_Description: Downloadable Data
- Standard_Order_Process:
-
- Digital_Form:
-
- Digital_Transfer_Information:
-
- Transfer_Size: 159.050
- Metadata_Reference_Information:
-
- Metadata_Date: 20090915
- Metadata_Contact:
-
- Contact_Information:
-
- Contact_Organization_Primary:
-
- Contact_Organization: Watershed
Sciences, Inc.
- Contact_Person: REQUIRED: The person
responsible for the metadata information.
- Contact_Address:
-
- Address_Type: mailing address
- Address: 257B SW Madison Ave.
- City: Corvallis
- State_or_Province: OR
- Postal_Code: 97333
- Country: USA
- Contact_Voice_Telephone:
- REQUIRED: The telephone number by which individuals
can speak to the organization or individual.
- Contact_Electronic_Mail_Address:
watershedsciences.com
- Metadata_Standard_Name: FGDC Content Standards for
Digital Geospatial Metadata
- Metadata_Standard_Version: FGDC-STD-001-1998
- Metadata_Time_Convention: local time
- Metadata_Extensions:
-
- Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
- Profile_Name: ESRI Metadata Profile
Generated by mp
version 2.9.6 on Thu Jan 21 16:26:36 2010