2006 USFS Lidar DEM: Rogue River - Siskiyou National Forest - Ashland, OR
OCM Partners
Data Set
(DS)
| ID: 62821
| Published / External
Created: 2020-08-27
|
Last Modified: 2024-01-10
Project (PRJ) | ID: 49404
ID: 62821
Data Set (DS)
* Discovery• First Pass
» Metadata Rubric
Item Identification
* » Title | 2006 USFS Lidar DEM: Rogue River - Siskiyou National Forest - Ashland, OR |
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Short Name | or2006_ashland_m9167_metadata |
* Status | Completed |
Creation Date | |
Revision Date | |
• 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. |
Notes | |
Other Citation Details | |
• Supplemental Information | |
DOI (Digital Object Identifier) | |
DOI Registration Authority | |
DOI Issue Date |
Keywords
Theme Keywords
Thesaurus | Keyword |
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Global Change Master Directory (GCMD) Science Keywords | EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION |
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 | erosion |
Temporal Keywords
Thesaurus | Keyword |
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* Spatial Keywords
Thesaurus | Keyword |
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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 |
Stratum Keywords
Thesaurus | Keyword |
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Instrument Keywords
Thesaurus | Keyword |
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Global Change Master Directory (GCMD) Instrument Keywords | LIDAR > Light Detection and Ranging |
Platform Keywords
Thesaurus | Keyword |
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Global Change Master Directory (GCMD) Platform Keywords | Airplane > Airplane |
Physical Location
• » Organization | Office for Coastal Management |
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• » City | Charleston |
• » State/Province | SC |
• Country | |
• » Location Description |
Data Set Information
* Data Set Scope Code | Data Set |
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• Data Set Type | Elevation |
• Maintenance Frequency | None Planned |
Maintenance Note | |
» Data Presentation Form | Model (digital) |
• Entity Attribute Overview | |
Entity Attribute Detail Citation | |
Entity Attribute Detail URL | |
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
* » Support Role | Data Steward |
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* » Date Effective From | 2020 |
Date Effective To | |
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 |
Fax | |
Mobile | |
URL | https://coast.noaa.gov |
Business Hours | |
Contact Instructions |
* » Support Role | Distributor |
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* » Date Effective From | 2020 |
Date Effective To | |
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 |
Fax | |
Mobile | |
URL | https://coast.noaa.gov |
Business Hours | |
Contact Instructions |
* » Support Role | Metadata Contact |
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* » Date Effective From | 2020 |
Date Effective To | |
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 |
Fax | |
Mobile | |
URL | https://coast.noaa.gov |
Business Hours | |
Contact Instructions |
* » Support Role | Point of Contact |
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* » Date Effective From | 2020 |
Date Effective To | |
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 |
Fax | |
Mobile | |
URL | https://coast.noaa.gov |
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Extents
Currentness Reference | Ground Condition |
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Extent Group 1
Extent Description |
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Extent Group 1 / Geographic Area 1
* » W° Bound | -122.820694 |
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* » E° Bound | -122.614692 |
* » N° Bound | 42.219549 |
* » S° Bound | 42.062313 |
* » Description |
Extent Group 1 / Vertical Extent
EPSG Code | |
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Extent Group 1 / Time Frame 1
* » Time Frame Type | Range |
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* » Start | 2006-07-01 |
End | 2006-07-04 |
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Description |
Spatial Information
Spatial Resolution
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Spatial Representation
Grid Representation Used? | Yes |
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Vector Representation Used? | No |
Text / Table Representation Used? | No |
TIN Representation Used? | No |
Stereo Model Representation Used? | No |
Video Representation Used? | No |
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Reference Systems
Reference System
EPSG Code | EPSG:5703 | ||||||||||||||||||||||||||||
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EPSG Code | EPSG:26910 | ||||||||||||||||||||||||||||
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Access Information
Data License | |
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Data License URL | |
Data License Statement | |
* » Security Class | Unclassified |
* Security Classification System | |
Security Handling Description | |
• Data Access Policy | |
» 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. |
Metadata Access Constraints | |
Metadata Use Constraints |
Distribution Information
Start Date | 2019-10-18 |
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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 Date/Time | |
File Type (Deprecated) | Zip |
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Compression | Zip |
Review Status |
Start Date | 2019-10-18 |
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End Date | Present |
» Download URL | https://noaa-nos-coastal-lidar-pds.s3.us-east-1.amazonaws.com/dem/OLC_Rogue_Siskiyou_DEM_2006_9176/index.html |
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 (Deprecated) | GeoTIFF |
Distribution Format | GeoTIFF |
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URLs
URL | https://noaa-nos-coastal-lidar-pds.s3.us-east-1.amazonaws.com/dem/OLC_Rogue_Siskiyou_DEM_2006_9176/supplemental/or2006_rogue_siskiyou_m9176.kmz |
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Name | Browse graphic |
URL Type | Browse Graphic |
File Resource Format | KML |
Description |
This graphic displays the footprint for this lidar data set. |
URL | https://noaa-nos-coastal-lidar-pds.s3.us-east-1.amazonaws.com/dem/OLC_Rogue_Siskiyou_DEM_2006_9176/supplemental/Rogue_River_Siskiyou_Ashland_report.pdf |
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Name | Dataset report |
URL Type | Online Resource |
File Resource Format | |
Description |
Link to data set report. |
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Activity Log
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Issues
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Technical Environment
Description |
POSGPS, POSProc, REALM, TerraScan, Terramatch, TerraModel, ArcGIS |
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Data Quality
Representativeness | |
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Accuracy | |
Analytical Accuracy | |
Horizontal Positional Accuracy | |
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. |
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» Quality Control Procedures Employed |
Data Management
» Have Resources for Management of these Data Been Identified? | Yes |
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» Approximate Percentage of Budget for these Data Devoted to Data Management | Unknown |
» Do these Data Comply with the Data Access Directive? | Yes |
» Is Access to the Data Limited Based on an Approved Waiver? | |
» If Distributor (Data Hosting Service) is Needed, Please Indicate | |
» Approximate Delay Between Data Collection and Dissemination | |
» If Delay is Longer than Latency of Automated Processing, Indicate Under What Authority Data Access is Delayed | |
» Actual or Planned Long-Term Data Archive Location | NCEI-CO |
» Approximate Delay Between Data Collection and Archiving | |
» 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
» Lineage Statement |
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Sources
Citation Title | DOGAMI |
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Process Steps
Process Step Number | 1 |
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» 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. |
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Process Step Number | 2 |
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» 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. |
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Process Step Number | 3 |
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» 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. |
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Process Step Number | 4 |
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» 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). |
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Process Step Number | 5 |
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» 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. |
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Process Step Number | 6 |
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» 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) |
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Acquisition Information
Instruments
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Child Items
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Related Items
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Data Set (DS) | Cross Reference |
2006 USFS Lidar: Rogue River - Siskiyou National Forest - Ashland, OR Point cloud used to create this DEM |
Catalog Details
Catalog Item ID | 62821 |
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Metadata Record Created By | Rebecca Mataosky |
Metadata Record Created | 2020-08-27 20:27+0000 |
Metadata Record Last Modified By | Kirk Waters |
» Metadata Record Last Modified | 2024-01-10 19:13+0000 |
Metadata Record Published | 2024-01-10 |
Owner Org | OCMP |
Metadata Publication Status | Published Externally |
Do Not Publish? | N |
Metadata Workflow State | Published / External |
Metadata Last Review Date | 2020-08-28 |
Metadata Review Frequency | 1 Year |
Metadata Next Review Date | 2021-08-28 |
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