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Short Citation:
OCM Partners, 2023: 2006 USFS Lidar DEM: Rogue River - Siskiyou National Forest - Ashland, OR, https://www.fisheries.noaa.gov/inport/item/62821.

Item Identification

Title: 2006 USFS Lidar DEM: Rogue River - Siskiyou National Forest - Ashland, OR
Short Name: or2006_ashland_m9167_metadata
Status: Completed
Publication Date: 2006
Abstract:

No metadata record for this data set was provided to the NOAA Office for Coastal Management (OCM). This record was created with information from the data report. A link to the data report is provided in the URL section of this metadata record.

Geographic Extent: Ashland study area, covering approximately 46,253 acres.

Dataset Description: Watershed Sciences, Inc. acquired and processed lidar data in the Ashland, OR Study Area in the Rogue River - Siskiyou National Forest. Lidar data acquisition occurred July 1 - 4, 2006. Settings for lidar data capture produced an average resolution of at least 7.5 points per square meter. The resolution of the DEM is 1 meter.

Purpose:

To map forest and vegetation stand structure in the forest and to provide an accurate ground model for the Rogue River-Siskiyou National Forest, near Ashland, Oregon.

Keywords

Theme Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION
UNCONTROLLED
ISO 19115 Topic Category elevation
LiDAR, 3DEP, DEM, Raster, LAS Elevation data
LiDAR, 3DEP, DEM, Raster, LAS Hydrology
LiDAR, 3DEP, DEM, Raster, LAS LAS Point Cloud
LiDAR, 3DEP, DEM, Raster, LAS Lidar
LiDAR, 3DEP, DEM, Raster, LAS model
LiDAR, 3DEP, DEM, Raster, LAS remote sensing
None DEM
None digital elevation model
None erosion
None laser
None lidar
None Topography

Spatial Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA
Global Change Master Directory (GCMD) Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > OREGON
Global Change Master Directory (GCMD) Location Keywords
VERTICAL LOCATION > LAND SURFACE
UNCONTROLLED
None Ashland
None Continent > North America > United States Of America > Oregon > Jackson County
None Rogue River - Siskiyou National Forest

Instrument Keywords

Thesaurus Keyword
UNCONTROLLED
Global Change Master Directory (GCMD) Instrument Keywords Earth Remote Sensing Instruments > Active Remote Sensing > Profilers/Sounders > Lidar/Laser Sounders > LIDAR > Light Detection and Ranging

Platform Keywords

Thesaurus Keyword
UNCONTROLLED
Global Change Master Directory (GCMD) Platform Keywords Aircraft > Aircraft

Physical Location

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

Data Set Information

Data Set Scope Code: Data Set
Data Set Type: Elevation
Maintenance Frequency: None Planned
Data Presentation Form: Model (digital)
Distribution Liability:

Any conclusions drawn from the analysis of this information are not the responsibility of Watershed Sciences, Inc., USFS, the Oregon Lidar Consortium, DOGAMI, NOAA, the Office for Coastal Management or its partners.

Data Set Credit: Watershed Sciences, Inc. flew the LiDAR and processed the data, Oregon Lidar Consortium (OLC)

Support Roles

Data Steward

CC ID: 988320
Date Effective From: 2020
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: 988321
Date Effective From: 2020
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: 988322
Date Effective From: 2020
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: 988323
Date Effective From: 2020
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: 988341
W° Bound: -122.820694
E° Bound: -122.614692
N° Bound: 42.219549
S° Bound: 42.062313

Extent Group 1 / Time Frame 1

CC ID: 988340
Time Frame Type: Range
Start: 2006-07-01
End: 2006-07-04

Spatial Information

Spatial Representation

Representations Used

Grid: Yes
Vector: No
Text / Table: No
TIN: No
Stereo Model: No
Video: No

Reference Systems

Reference System 1

CC ID: 988343

Coordinate Reference System

CRS Type: Vertical
EPSG Code: EPSG:5703
EPSG Name: NAVD88 height
See Full Coordinate Reference System Information

Reference System 2

CC ID: 988342

Coordinate Reference System

CRS Type: Projected
EPSG Code: EPSG:26910
EPSG Name: NAD83 / UTM zone 10N
See Full Coordinate Reference System Information

Access Information

Security Class: Unclassified
Data Access Procedure:

Data is available online for bulk and custom downloads.

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: 988324
Start Date: 2019-10-18
End Date: Present
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=9176/details/9176
Distributor: NOAA Office for Coastal Management (NOAA/OCM) (2020 - Present)
File Name: Customized Download
Description:

Create custom data files by choosing data area, product type, map projection, file format, datum, etc. A new metadata will be produced to reflect your request using this record as a base.

File Type: Zip
Compression: Zip

Distribution 2

CC ID: 988325
Start Date: 2019-10-18
End Date: Present
Download URL: https://coast.noaa.gov/htdata/raster5/elevation/OLC_Rogue_Siskiyou_DEM_2006_9176
Distributor: NOAA Office for Coastal Management (NOAA/OCM) (2020 - Present)
File Name: Bulk Download
Description:

Bulk download of data files in UTM Zone 10 (NAD83) coordinates and NAVD88 (Geoid03) elevations in meters.

File Date/Time: 2020-08-27 00:00:00
File Type: GeoTIFF

URLs

URL 1

CC ID: 988327
URL: https://coast.noaa.gov/htdata/raster5/elevation/OLC_Rogue_Siskiyou_DEM_2006_9176/supplemental/or2006_rogue_siskiyou_m9176.kmz
Name: Browse graphic
URL Type:
Browse Graphic
File Resource Format: KML
Description:

This graphic displays the footprint for this lidar data set.

URL 2

CC ID: 988328
URL: https://coast.noaa.gov/htdata/raster5/elevation/OLC_Rogue_Siskiyou_DEM_2006_9176/supplemental/Rogue_River_Siskiyou_Ashland_report.pdf
Name: Dataset report
URL Type:
Online Resource
File Resource Format: PDF
Description:

Link to data set report.

Technical Environment

Description:

POSGPS, POSProc, REALM, TerraScan, Terramatch, TerraModel, ArcGIS

Data Quality

Vertical Positional Accuracy:

The final quality control measure is a statistical accuracy assessment that compares known RTK ground survey points to the closest laser point. 859 RTK points were collected throughout the study area and were used to assess the LiDAR data accuracy. The RSME for the lidar point data for this data set is 4 cm.

Data Management

Have Resources for Management of these Data Been Identified?: Yes
Approximate Percentage of Budget for these Data Devoted to Data Management: Unknown
Do these Data Comply with the Data Access Directive?: Yes
Actual or Planned Long-Term Data Archive Location: NCEI-CO
How Will the Data Be Protected from Accidental or Malicious Modification or Deletion Prior to Receipt by the Archive?:

Data is backed up to tape and to cloud storage.

Lineage

Sources

DOGAMI

CC ID: 988347

Process Steps

Process Step 1

CC ID: 988337
Description:

The LiDAR survey utilized an Opetch ALTM 3100 mounted in the belly of a Cessna Grand Caravan 208B. The survey was conducted on July 1st-4th, 2006 (Julian Days 182-185). Quality control (QC) pre-mission flights were performed based on manufacturer’s specifications prior to the survey. The QC flight was conducted at the Ashland, Oregon Airport using known surveyed control points. The positional accuracy of the LiDAR (x, y, z) returns are checked against these known locations to verify the calibration and to report base accuracy. The Optech ALTM 3100 system was set to acquire 70,000 laser pulses per second (i.e. 70kHz pulse repetition rate) and flown at 1,100 meters above ground level (AGL), capturing a scan angle of +/-14o from nadir1, to yield points with an average density of ≥7.5 points per square meter. The entire area was surveyed with opposing flight line sidelap of 50% (100% overlap) to reduce laser shadowing and increase surface laser painting. The system allows up to four range measurements per pulse, and all laser returns were processed for the output dataset. To solve for laser point position, it is vital to have an accurate description of aircraft position and attitude. Aircraft position is described as x, y and z and measured twice a second (2 Hz) by an onboard differential GPS unit. Aircraft attitude is measured 200 times a second (200 Hz) as pitch, roll and yaw (heading) from an onboard inertial measurement unit (IMU). Throughout the survey, two dual frequency DGPS base stations at monuments placed by Watershed Sciences and corrected by the Online Positioning User Service (OPUS), recorded fast static (1 Hz) data. The fast static ground GPS data were used to calculate a kinematic correction for the aircraft position.

Process Step 2

CC ID: 988338
Description:

Two Thales Z-max units were used for the ground survey portion of the survey. To collect accurate ground surveyed points, a GPS base unit was set up to broadcast a kinematic correction to a roving GPS unit. The ground crew used a roving unit to receive radio-relayed kinematic corrected positions from the base unit. 859 RTK points were collected throughout the study area and were used to assess the LiDAR data accuracy.

Process Step 3

CC ID: 988344
Description:

Laser point coordinates were computed using the REALM v. 3.5.2 software suite based on independent data from the LiDAR system (pulse time, scan angle), aircraft attitude, and aircraft position. Laser point returns (first through fourth) are assigned an associated (x, y, z) coordinate, along with unique intensity values (1-255). The data are output into one very large LAS v. 1.0 file format; each point has a corresponding scan angle, return number (echo), intensity, and x,y,z (easting, northing, and elevation) information. The initial laser point file is too large to process. To facilitate laser point processing, bins (polygons) were created to divide the dataset into manageable sizes (less than 500 MB and approximately 1 km2 each). Flight lines and LiDAR data were then reviewed to ensure complete coverage of the study area and positional accuracy of the laser points. These processing bins were ultimately aggregated into areas of 0.9375-minute quadrangles (1/64th of a standard USGS 7.5-minute quadrangle.

Process Step 4

CC ID: 988346
Description:

Once the laser point data are imported into bins in TerraScan, a manual calibration test is performed to assess the system offsets for pitch, roll, yaw and scale.

Using a geometric relationship developed by Watershed Sciences, each of these offsets is resolved and corrected if necessary. The LiDAR points are then filtered for noise, pits and birds by screening for absolute elevation limits, isolated points and height above ground. Each bin is then inspected for pits and birds manually, and spurious points are removed. For a bin measuring 1 km2, an average of 20-40 points are found to be artificially low or high.

The internal calibration is refined using TerraMatch. Points from overlapping lines are tested for internal consistency and final adjustments are made for system misalignments (i.e. pitch, roll, yaw and scale offsets). Once these misalignments are corrected, GPS drift can then be resolved and removed. The resulting dataset is internally calibrated using both manual and automated routines. At this point in the workflow, remaining data have passed initial screening and are deemed accurate.

The TerraScan software suite is designed specifically for classifying near-ground laser points (Soinenen, 2004). The processing sequence begins by ‘removing’ all points that are not ‘near’ the earth based on evaluation of the multi-return layers. The resulting bare earth (ground) model is visually inspected and additional ground modeling is performed in site specific areas (over a 50 meter radius) to improve ground detail. This is only done in areas with known ground modeling deficiencies, such as: bedrock outcrops, cliffs, deeply incised stream banks, and dense vegetation.

Custom vegetation modeling is also performed using Fusion v.2.1 deforestation algorithms (Haugerud and Harding, 2001; Andersen et al. 2003; McGaughey and Carson, 2003; McGaughey, in progress2).

Process Step 5

CC ID: 988345
Description:

The ground model rasters were created in TerraScan by creating TINs of the ground points and developing an ArcINFO GRID of the TIN. A raster of the bare ground surface was created at a 1-meter resolution, with z-units (elevation units) in meters. A Fusion v.2.1 5x5 model was used to develop a raster of buildings and vegetation (above ground surfaces) at a 1-meter resolution, with z-units (elevation units) in meters. All rasters were converted to ESRI GRID format and delivered with metadata.

Process Step 6

CC ID: 988336
Description:

The NOAA Office for Coastal Management (OCM) received 6 raster DEM files in ESRI ArcGrid format from DOGAMI. The data were in UTM Zone 10 (NAD83) coordinates and NAVD88 (Geoid03) elevations in meters. The bare earth raster files were at a 1 m grid spacing.

OCM performed the following processing on the data for Digital Coast storage and provisioning purposes:

1. Used internal script to assign the EPSG codes (Horiz - 26910, Vert - 5703) and convert to GeoTiff format.

2. Copied the files to https.

Process Date/Time: 2020-08-27 00:00:00
Process Contact: Office for Coastal Management (OCM)

Catalog Details

Catalog Item ID: 62821
GUID: gov.noaa.nmfs.inport:62821
Metadata Record Created By: Rebecca Mataosky
Metadata Record Created: 2020-08-27 20:27+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2022-08-09 17:11+0000
Metadata Record Published: 2020-08-28
Owner Org: OCMP
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2020-08-28
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2021-08-28