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Short Citation:
OCM Partners, 2022: 2010 King County (WA) Dept of Natural Resources and Parks Lidar: Cedar River, https://www.fisheries.noaa.gov/inport/item/50161.

Item Identification

Title: 2010 King County (WA) Dept of Natural Resources and Parks Lidar: Cedar River
Short Name: wa2010_kcdnrp_cedarriver_m2533_metadata
Status: Completed
Publication Date: 2013-08-14
Abstract:

Watershed Sciences, Inc. (WS) collected Light Detection and Ranging (LiDAR) data and

true-color orthophotographs of King County, WA from March 18 to March 20, 2010.

The total area of combined study areas orthophotographs and LiDAR, including a

100 m buffer, is approximately 21,038 acres.

Original contact information:

Contact Name: Dan Eastman

Contact Org: King County Dept. of Natural Resources and Parks

Title: Senior Ecologist

Phone: 206-263-6319

Purpose:

More information can be obtained from the LiDAR report. The link to the report can be found here:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2533/supplemental/wa2010_kingcountydnrp_cedarriver_LiDAR_Report.pdf

Notes:

10805

Supplemental Information:

Support of the FEMA's FIRM program.

A footprint of this data may be viewed in Google Earth at:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2533/supplemental/wa2010_kingcountydnrp_cedarriver.KMZ

A LiDAR Report from the vendor for this data set may be viewed here:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2533/supplemental/wa2010_kingcountydnrp_cedarriver_LiDAR_Report.pdf

Keywords

Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
elevation
UNCONTROLLED
None TIN

Physical Location

Organization: Office for Coastal Management
City: Charleston
State/Province: SC

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: Unknown
Entity Attribute Overview:

Lidar points in LAZ format Classed 1,2,7

Entity Attribute Detail Citation:

none

Distribution Liability:

Any conclusions drawn from the analysis of this information are not the

responsibility of KC DNRP, WS, the Office for Coastal Management, or its partners.

Support Roles

Data Steward

CC ID: 692696
Date Effective From: 2013-08-14
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Distributor

CC ID: 692698
Date Effective From: 2013-08-14
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Metadata Contact

CC ID: 692699
Date Effective From: 2013-08-14
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Point of Contact

CC ID: 692697
Date Effective From: 2013-08-14
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Extents

Currentness Reference: Ground Condition

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 1134345
W° Bound: -122.21932256
E° Bound: -121.9699449
N° Bound: 47.5011362
S° Bound: 47.3738203

Extent Group 1 / Time Frame 1

CC ID: 1134342
Time Frame Type: Discrete
Start: 2010-05-18

Extent Group 1 / Time Frame 2

CC ID: 1134343
Time Frame Type: Discrete
Start: 2010-05-19

Extent Group 1 / Time Frame 3

CC ID: 1134344
Time Frame Type: Discrete
Start: 2010-05-20

Spatial Information

Spatial Representation

Representations Used

Vector: Yes

Access Information

Security Class: Unclassified
Data Access Procedure:

This data can be obtained on-line at the following URL: https://coast.noaa.gov/dataviewer

The data set is dynamically generated based on user-specified parameters.

;

Data Access Constraints:

None

Data Use Constraints:

Users should be aware that temporal changes may have occurred since this data set

was collected and some parts of this data may no longer represent actual surface

conditions. Users should not use this data for critical applications without a

full awareness of its limitations.

Distribution Information

Distribution 1

CC ID: 743378
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=2533
Distributor:
File Name: Customized Download
Description:

Create custom data files by choosing data area, product type, map projection, file format, datum, etc.

Distribution 2

CC ID: 743379
Download URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2533/index.html
Distributor:
File Name: Bulk Download
Description:

Simple download of data files.

URLs

URL 1

CC ID: 743381
URL: https://coast.noaa.gov/dataviewer
URL Type:
Online Resource

URL 2

CC ID: 743382
URL: https://coast.noaa.gov
URL Type:
Online Resource

URL 3

CC ID: 743383
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2533/supplemental/wa2010_kingcountydnrp_cedarriver.KMZ
Name: Browse Graphic
URL Type:
Browse Graphic
File Resource Format: kmz
Description:

This graphic shows the lidar coverage for the King County Cedar River Topographic LiDAR Survey

Activity Log

Activity Log 1

CC ID: 692718
Activity Date/Time: 2016-05-23
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 692717
Activity Date/Time: 2017-11-14
Description:

Converted from FGDC Content Standards for Digital Geospatial Metadata (version FGDC-STD-001-1998) using 'fgdc_to_inport_xml.pl' script. Contact Tyler Christensen (NOS) for details.

Activity Log 3

CC ID: 718766
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 743380
Activity Date/Time: 2018-03-13
Description:

Partial upload to move data access links to Distribution Info.

Data Quality

Accuracy:

Attribute accuracy is tested in the LiDAR processing stage.

After classification of the LiDAR data, the 'bald earth' point class is compared to

ground control collected within the project area.

Horizontal Positional Accuracy:

Horizontal positional accuracy for LiDAR is dependent upon the quality of the GPS/INS solution, sensor calibration and ground conditions at the time of data capture. The standard system results for horizontal accuracy are less than 1 meter.; Quantitative Value: 1 meters, Test that produced the value: This value is computed by comparing ground control to an intensity based image derived from the classified LiDAR data and represents the RMSE of residuals on controls within the project area.

Vertical Positional Accuracy:

Vertical positional accuracy for LiDAR is dependent upon the quality of the GPS/INS solution, sensor calibration and ground conditions at the time of data capture. The vertical accuracy for this project was tested with a resultant RMSE of 0.030 meter (0.099 feet).; Quantitative Value: 0.03 meters, Test that produced the value: This value is computed by comparing ground control elevation to the classified LiDAR ground surface and represents the RMSE of residuals on controls within the project area.

Completeness Report:

LiDAR data is collected for the project area. Post processing of the simultaneously

acquired GPS/INS is performed and applied to the laser returns to output a point cloud in the specified

project coordinate system and datums. The point cloud data is then subjected to automated

classification routines to assign all points in the point cloud to ground, water, overlap and unclassified

point classes. Anomalous laser returns that occur infrequently are removed entirely from the data set.

The ground class points are then compared to surveyed ground control to develop an accuracy measure of

the laser terrain data.

Conceptual Consistency:

LiDAR data is collected within the project area, processed and verified against control.

Lineage

Process Steps

Process Step 1

CC ID: 1134338
Description:

Applications and Work Flow Overview:

1.Resolved kinematic corrections for aircraft position data using kinematic

aircraft GPS and static ground GPS data. Software: Waypoint GPS v.8.10, Trimble

Geomatics Office v.1.62

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. Software: IPAS v.1.35

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.

Software: ALS Post Processing Software v.2.7

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). Software: TerraScan

v.10.009

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. Software: TerraMatch v.10.006

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. Data were then converted to

orthometric elevations (NAVD88) by applying a Geoid03 correction.

Ground models were created as a triangulated surface and exported

as ArcInfo ASCII grids at a 1 -meter pixel resolution. Software:

TerraScan v.10.009, ArcMap v. 9.3.1, TerraModeler v.10.004

7.Converted raw images to tif format, calibrating raw image pixels

for gain and exposure settings of each image. Software: Leica

Calibration Post Processing v.1.0.4

8.Calculated photo position and orientation by associating the SBET

position (Step 3) to each image capture time. Software: IPASCO v.1.3

9.Orthorectified calibrated tiffs utilizing photo orientation information

(Step 8) and the LiDAR-derived ground surface (Step 6). Software:

Leica Photogrammetry Suite v.9.2

10.To correct light imbalances between overlapping images, radiometric

global tilting adjustments were applied to the rectified images. Software:

OrthoVista v.4.4.

11.The color corrected images were then mosaicked together for the

survey area and subset into tiles to make the file size more

manageable. Software: OrthoVista v.4.4.

12.Mosaicked tiles were inspected for misalignments introduced

by automatic seam generation. Misalignments were corrected by

manual adjustments to seams. Software: Adobe Photoshop 7.0,

OrthoVista v.4.4.

Process Date/Time: 2010-01-01 00:00:00

Process Step 2

CC ID: 1134339
Description:

LiDAR data is processed using the GPS/INS solution. Data is classified to produce:

Class 1: unclassified points

Class 2: ground points

Class 7: low point (noise)

Process Date/Time: 2012-08-13 00:00:00

Process Step 3

CC ID: 1134340
Description:

The NOAA Office for Coastal Management (OCM) received the files in las format. The files contained lidar elevation and intensity

measurements. The data were in GA State Plane coordinates and NAVD88 (orthometric) heights in feet. OCM performed the

following processing for data storage and Digital Coast provisioning purposes:

1. The data were converted from WA State Plane North coordinates to geographic coordinates.

2. The data were converted from NAVD88 (orthometric) heights in feet to GRS80 (ellipsoid) heights in meters using Geoid 03.

3. The data were filtered to remove outliers.

4. The LAS data were sorted by latitude and the headers were updated.

Process Date/Time: 2013-08-12 00:00:00

Catalog Details

Catalog Item ID: 50161
GUID: gov.noaa.nmfs.inport:50161
Metadata Record Created By: Anne Ball
Metadata Record Created: 2017-11-15 15:24+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2022-08-09 17:11+0000
Metadata Record Published: 2022-03-16
Owner Org: OCMP
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2022-03-16
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2023-03-16