gov.noaa.nmfs.inport:58162
eng
UTF8
dataset
Elevation
OCM Partners
resourceProvider
NOAA Office for Coastal Management
(843) 740-1202
2234 South Hobson Ave
Charleston
SC
29405-2413
coastal.info@noaa.gov
https://coast.noaa.gov
WWW:LINK-1.0-http--link
NOAA Office for Coastal Management Website
NOAA Office for Coastal Management Home Page
information
pointOfContact
2024-02-29T00:00:00
ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data
ISO 19115-2:2009(E)
EPSG::5703
EPSG::6339
2017 OLC FEMA Lidar DEM: Grass Valley, OR
or2017_grs_vall_fema_dem_m8902_metadata
2017-08-04
publication
NOAA/NMFS/EDM
58162
https://www.fisheries.noaa.gov/inport/item/58162
WWW:LINK-1.0-http--link
Full Metadata Record
View the complete metadata record on InPort for more information about this dataset.
information
https://coast.noaa.gov/
WWW:LINK-1.0-http--link
NOAA's Office for Coastal Management (OCM) website
Information on the NOAA Office for Coastal Management (OCM)
download
https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=8920
WWW:LINK-1.0-http--link
Citation URL
Link to custom download, from the Data Access Viewer (DAV), the lidar point data from which these raster Digital Elevation Model (DEM) data were created.
download
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/8920/supplemental/2017_OLC_Grass_Valley_FEMA_Data_Report.pdf
WWW:LINK-1.0-http--link
Dataset report
Link to data set report.
download
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/8920/breaklines/
WWW:LINK-1.0-http--link
Citation URL
Link to the breakline data.
download
https://coast.noaa.gov/dataviewer/
WWW:LINK-1.0-http--link
NOAA's Office for Coastal Management (OCM) Data Access Viewer (DAV)
The Data Access Viewer (DAV) allows a user to search for and download elevation, imagery, and land cover data for the coastal U.S. and its territories. The data, hosted by the NOAA Office for Coastal Management, can be customized and requested for free download through a checkout interface. An email provides a link to the customized data, while the original data set is available through a link within the viewer.
download
This bare earth hydro flattened digital elevation model (DEM) represents the earth's surface with all vegetation and human-made structures removed and hydro flattening performed within the OLC Grass Valley FEMA buffered project area. Bare Earth Hydro Flattened DEMs were derived from LiDAR data using TIN processing of the ground point returns. The DEM grid cell size is 1 meter. The data were developed based on the Universal Transverse Mercator (UTM) 10N projection; horizontal datum of NAD83 (2011), meters and vertical datum of NAVD88 Geoid 12B, meters. See Process Steps for derivation of raster data sets.
In addition to these bare earth Digital Elevation Model (DEM) data, the lidar point data that these DEM data were created from and the breakline data are also available. These data are available for download at the link provided in the URL section of this metadata record.
This raster dataset provides high resolution terrain elevation data in the U.S. Geological Survey OLC Grass Valley FEMA area.
USGS, Quantum Spatial, Inc.
completed
NOAA Office for Coastal Management
(843) 740-1202
2234 South Hobson Ave
Charleston
SC
29405-2413
coastal.info@noaa.gov
https://coast.noaa.gov
WWW:LINK-1.0-http--link
NOAA Office for Coastal Management Website
NOAA Office for Coastal Management Home Page
information
pointOfContact
NOAA Office for Coastal Management
(843) 740-1202
2234 South Hobson Ave
Charleston
SC
29405-2413
coastal.info@noaa.gov
https://coast.noaa.gov
WWW:LINK-1.0-http--link
NOAA Office for Coastal Management Website
NOAA Office for Coastal Management Home Page
information
custodian
notPlanned
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/8920/supplemental/or2017_grs_vall_fema_m8920.kmz
This graphic displays the footprint for this lidar data set.
KML
EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION
theme
Global Change Master Directory (GCMD) Science Keywords
17.0
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > OREGON
VERTICAL LOCATION > LAND SURFACE
place
Global Change Master Directory (GCMD) Location Keywords
17.0
LIDAR > Light Detection and Ranging
instrument
Global Change Master Directory (GCMD) Instrument Keywords
17.2
Airplane > Airplane
DEM > Digital Elevation Model
platform
Global Change Master Directory (GCMD) Platform Keywords
17.2
DEM
DTM
Light Detection and Ranging
bare earth
bare ground
high-resolution
hydro-flattening
theme
DEMs - partner (no harvest)
project
InPort
otherRestrictions
Cite As: OCM Partners, [Date of Access]: 2017 OLC FEMA Lidar DEM: Grass Valley, OR [Data Date Range], https://www.fisheries.noaa.gov/inport/item/58162.
NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose.
otherRestrictions
Access Constraints: None
otherRestrictions
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.
otherRestrictions
Distribution Liability: Any conclusions drawn from the analysis of this information are not the responsibility of Quantum Spatial, Inc, USGS, the Oregon Lidar Consortium (OLC), DOGAMI, NOAA, the Office for Coastal Management or its partners.
unclassified
2017 OLC FEMA Lidar: Grass Valley, OR
NOAA/NMFS/EDM
58161
crossReference
NOAA Data Management Plan (DMP)
NOAA/NMFS/EDM
58162
https://www.fisheries.noaa.gov/inportserve/waf/noaa/nos/ocmp/dmp/pdf/58162.pdf
WWW:LINK-1.0-http--link
NOAA Data Management Plan (DMP)
NOAA Data Management Plan for this record on InPort.
information
crossReference
eng; US
elevation
Environment as of Metadata Creation: Microsoft [Unknown] Version 6.2 (Build 9200) ; Esri ArcGIS 10.2.2 (Build 3552) Service Pack N/A (Build N/A)
-120.795613
-120.388552
45.296337
45.665774
| Currentness: Ground Condition
2017-04-28
2017-05-04
false
eng
false
Quantum Spatial, Inc.
Zip
Zip
GeoTIFF
NOAA Office for Coastal Management
(843) 740-1202
2234 South Hobson Ave
Charleston
SC
29405-2413
coastal.info@noaa.gov
https://coast.noaa.gov
WWW:LINK-1.0-http--link
NOAA Office for Coastal Management Website
NOAA Office for Coastal Management Home Page
information
distributor
https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=8902
WWW:LINK-1.0-http--link
Customized Download
Create custom data files by choosing data area, map projection, file format, etc. A new metadata will be produced to reflect your request using this record as a base.
download
https://noaa-nos-coastal-lidar-pds.s3.us-east-1.amazonaws.com/dem/OLC_Grass_Valley_FEMA_DEM_2017_8902/index.html
WWW:LINK-1.0-http--link
Bulk Download
Bulk download of data files in the original coordinate system.
download
dataset
Vertical Positional Accuracy
LAS data from the OLC Grass Valley FEMA project was compared to independent check points to determine the NVA of the LAS Swath and of the Bare Earth DEM.
LAS Swath Non-Vegetated Vertical Accuracy (NVA) Tested 0.076 meters non-vegetated vertical accuracy at a 95 percent confidence level, derived according to NSSDA, in open terrain using 0.039 meters (RMSEz) x 1.96000 as defined by the National Standards for Spatial Data Accuracy (NSSDA); assessed and reported using National Digital Elevation Program (NDEP)/ASPRS Guidelines.
Bare earth DEM Non-vegetated Vertical Accuracy (NVA) tested 0.085 meters non-vegetated vertical accuracy at a 95 percent confidence level, derived according to NSSDA, in open terrain using 0.043 meters (RMSEz) x 1.96000 as defined by the National Standards for Spatial Data Accuracy (NSSDA); assessed and reported using 43 NVA points uinsg National Digital Elevation Program (NDEP)/ASPRS Guidelines and tested against the DEM.
Vegetated Vertical Accuracy (VVA): The required accuracy of the VVA at the 95th percentile according to specification is 0.294 meters. The VVA tested 0.107 meters at the 95th percentile using National Digital Elevation Program (NDEP)/ASPRS Guidelines against the DEM using 21 VVA points. No VVA errors larger than 95th percentile existed.
Completeness Report
LiDAR has been collected and processed for all areas within the OLC Grass Valley FEMA study area. In some areas of heavy vegetation and 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. In some areas with large bodies of water, competing water surface levels may be visible. This is due to seasonal water level fluctuation and intervals of time between acquisition of an area.
Conceptual Consistency
LiDAR flight lines have been examined to ensure that there was at least 55 - 75% sidelap, there are no gaps between flight lines, and overlapping flight lines have consistent elevation values. Shaded relief images have been visually inspected for data errors such as pits, border artifacts, gaps, and shifting. The data were examined at a 1:3000 scale.
Acquisition.
LiDAR data acquisition was conducted from 4/28/2017 to 5/4/2017. The survey utilized a Leica ALS80 sensor mounted in a Cessna Caravan. 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.
2017-04-22T00:00:00
Processing.
1. TRAJECTORY: Aircraft trajectory (position and attitude) were calculated based on on-board GPS and IMU data with post-processing refinement through coincident static GPS collection.
2. POST-PROCESSING: Laser point return coordinates (x,y,z) were computed using sensor-specific post processing software, combining LiDAR return range and intensity information with aircraft trajectory information.
3. INITIAL QAQC: The post-processed LiDAR files were assembled into flight lines and reviewed for gaps and consistency, as well as systematic noise.
4. CALIBRATION: Custom algorithms evaluated individual swaths for misalignments based on IMU configuration as well as aircraft attitude variability. Offsets were resolved through surface and linear matching algorithms that minimize variability in elevation and slope. Descriptive statistics, thresholds, and specifications providing transparency for data calibration are discussed in the accompanying Data Report.
5. GROUND MODELING: Ground classified point cloud was generated through proprietary data processing tools, with settings and thresholds appropriate to landscape and vegetation condition.
6. ARTIFACT FILTRATION: Noise and processing artifacts were filtered using post-processing software and proprietary quality control methods.
7. ACCURACY ASSESSMENT: Vertical accuracy for the LiDAR dataset was assessed against reserved Quality Assurance Points (QAPs) distributed throughout the study area and not used during calibration processes. See the accompanying Data Report for methodology, descriptive statistics, and relevant standards and reporting language.
8. DATA PRODUCT: LiDAR points classified as 'ground' were output as a digital elevation model (DEM).
9. Hydro Flattening Breakline Processing:
Class 2 LiDAR was used to create a bare earth surface model. ArcMap tools utilized rasters created within Bentley Microstation to auto-generate breaklines of inland streams and rivers with a 100 foot nominal width and manually edited where necessary. Breaklines for Lakes with surface area greater than 2 acres were generated using heads-up digitization.
Elevation values were assigned to all Inland Ponds and Lakes within ESRI ArcMap; Inland Pond and Lake Islands, Inland Stream and River Islands were assigned elevation values from within ESRI ArcMap.
All ground (ASPRS Class 2) LiDAR data inside of the collected inland breaklines were then classified to water (ASPRS Class 9) using TerraScan macro functionality. A buffer of 0.7 meters was also used around each hydro-flattened stream. These points were moved from ground (ASPRS Class 2) to Ignored Ground (ASPRS Class 10).
The breakline files were then translated to ESRI File-Geodatabase format using ESRI conversion tools.
2017-08-04T00:00:00
The NOAA Office for Coastal Management (OCM) received 795 bare earth DEM files in Arc Grid format from DOGAMI. The data were in UTM Zone 10N, NAD83 (2011), meters, coordinates and NAVD88 (Geoid12B) elevations in meters. The EPSG codes (Horizontal - 6339, Vertical - 5703), were assigned. The data were converted to GeoTIFF format for ingest into the Digital Coast Data Access Viewer and to adhere to the Open Data Policy.
2019-11-06T00:00:00
Office for Coastal Management
processor
Lidar data acquisition
Quantum Spatial, Inc.
originator