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Short Citation:
OCM Partners, 2022: 2007 Oregon Parks and Recreation Department Silver Falls State Park Lidar, https://www.fisheries.noaa.gov/inport/item/49899.

Item Identification

Title: 2007 Oregon Parks and Recreation Department Silver Falls State Park Lidar
Short Name: or2007_silver_falls_m105_metadata
Status: Completed
Publication Date: 2011-06
Abstract:

The dataset represents the Lidar elevations for Silver Falls State Park in Marion County, Oregon. The LiDAR data was collected during

March 2007. This was a leaf-off condition. The lidar data are multiple return and bare earth classified. An Optech 3100 LiDAR

system was mounted in a fixed-wing aircraft and flown 900 meters above ground level (AGL). A pulse repetition frequency (PRF)

of 71 kHz with at least 100% overlap (minimum 50% side-lap) was used. Greater than 8 points per square meter and 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. In some areas of heavy vegetation or forest cover, there may be relatively few ground points in the LiDAR data.

Elevation values for open water surfaces are not valid elevation values because few LiDAR points are returned from water surfaces.

Watershed Sciences, Inc. collected the LiDAR and created this data set for Oregon Parks and Recreation.

Original contact information:

Contact Name: Brady Callahan

Contact Org: Oregon Parks and Recreation

Phone: 503-986-0783

Email: brady.callahan@state.or.us

Purpose:

Provide high resolution terrain elevation and land cover elevation data.

Notes:

10543

Supplemental Information:

The Lidar Report for this data set may be viewed at:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/105/supplemental/LiDAR_Report_Silver_Falls.pdf

Keywords

Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
elevation
UNCONTROLLED
None Bare earth
None Bare ground
None High-resolution
None Light Detection and Ranging
None Oregon Parks and Recreation

Physical Location

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

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: None Planned
Distribution Liability:

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

Parks and Recreation Department, the Oregon Department of Geology and Mineral Industries, the Office for Coastal Management

or its partners.

Data Set Credit: Oregon Parks and Recreation

Support Roles

Data Steward

CC ID: 682481
Date Effective From: 2011-06
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: 682483
Date Effective From: 2011-06
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: 682484
Date Effective From: 2011-06
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: 682482
Date Effective From: 2011-06
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: 1132264
W° Bound: -122.693363
E° Bound: -122.578226
N° Bound: 44.916888
S° Bound: 44.819233

Extent Group 1 / Time Frame 1

CC ID: 1132263
Time Frame Type: Discrete
Start: 2007-03-14

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: 741969
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=105
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: 741970
Download URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/105/index.html
Distributor:
File Name: Bulk Download
Description:

Simple download of data files.

URLs

URL 1

CC ID: 741972
URL: https://coast.noaa.gov/dataviewer
URL Type:
Online Resource

URL 2

CC ID: 741973
URL: https://coast.noaa.gov
URL Type:
Online Resource

Activity Log

Activity Log 1

CC ID: 682508
Activity Date/Time: 2016-05-23
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 682507
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: 718480
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 741971
Activity Date/Time: 2018-03-13
Description:

Partial upload to move data access links to Distribution Info.

Data Quality

Horizontal Positional Accuracy:

1/3000th AGL

Vertical Positional Accuracy:

The Root Mean Square Error (RMSE) of the data set is 0.12 feet (3.65 cm).

Accuracy was assessed using 535 ground survey (real time kinematic) points.

Completeness Report:

LiDAR data has been collected and processed for all areas within the project study area.

Conceptual Consistency:

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 1:3500 scale.

Lineage

Process Steps

Process Step 1

CC ID: 1132259
Description:

Acquisition.

The LiDAR data was collected during March 2007. This was a leaf-off condition. An Optech 3100 LiDAR system was mounted in a

fixed-wing aircraft and flown 900 meters above ground level (AGL). A pulse repetition frequency (PRF) of 71 kHz with at

least 100% overlap (minimum 50% side-lap) was used. Greater than 8 points per square meter and 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/Time: 2007-01-01 00:00:00

Process Step 2

CC ID: 1132260
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 the REALM survey suite and PosPac 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 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 broken into processing bins and output areas and output as laser points, TINed and GRIDed surfaces. Bare earth

DEMs meet PSLC specifications.

Process Date/Time: 2007-01-01 00:00:00

Process Step 3

CC ID: 1132261
Description:

The NOAA Office for Coastal Management (OCM) received the files in las format. The files contained Lidar

elevation and intensity measurements. The data was in Lambert Conformal Conic projection and NAVD88 Geoid 03 vertical datum. OCM

performed the following processing to the data to make it available within Digital Coast:

1. The data were converted from Lambert Conformal Conic coordinates to geographic coordinates.

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

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

Process Date/Time: 2008-11-15 00:00:00

Catalog Details

Catalog Item ID: 49899
GUID: gov.noaa.nmfs.inport:49899
Metadata Record Created By: Anne Ball
Metadata Record Created: 2017-11-15 15:23+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