50281
2015 Lidar: Municipality of Anchorage, AK
ak2015_anchorage_m8406_metadata
Data Set
Published / External
49401
Lidar - partner (no harvest)
Project
Completed
2017-12-14
The base LiDAR deliverables will conform to USGS LBS specifications V1.4 for Quality Level 2 (QL2) data.
The QL2 requires collection of 2 points per square meter (ppsm), nominal LiDAR pulse spacing of no greater
than 0.7 meter for 463 square miles and 4 PPSM for 494 sq. miles and a vertical accuracy of better than 10-cm
RMSE. (Merrick will provide data to a 9.25cm vertical accuracy in the interest of meeting a 1 foot contour
accuracy specification and this will still meet the QL2 specification).
The NOAA Office for Coastal Management (OCM) downloaded this lidar data from the USGS ftp site, processed it and made it available on the NOAA Digital Coast. In addition to this lidar point data, bare earth digital elevation model (DEM) raster and breakline data are also available. Links to these data are located in the URL section of this metadata record. The breakline data has not been reviewed by the OCM and is made available at the user's discretion .
957 square miles of 2 ppsm and 4 ppsm LiDAR to USGS QL2 specifications to support the Municipality base mapping efforts.
Fully Classified LAS formatted files
LAS 1.4 format or as required by MOA
Classification of the LiDAR point cloud in accordance with the
following classification scheme:
Class 1 = Processed, but Unclassified
Class 2 = Bare-earth Ground
Class 7 = Low point (noise)
Class 9 = Water
Class 10 = ignored ground (near a Breaklines)
Class 17 = Bridges Decks
Theme
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION
Theme
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > OCEANS > COASTAL PROCESSES > COASTAL ELEVATION
Theme
ISO 19115 Topic Category
elevation
Theme
Light Detection and Ranging
Temporal
2015
Spatial
Global Change Master Directory (GCMD)
North America > United States > Alaska
Office for Coastal Management
Charleston
SC
US
Data Set
Elevation
None Planned
Point Cloud (digital)
LAS 1.4 format or as required by MOA
Classification of the LiDAR point cloud in accordance with the following classification scheme:
Class 1 = Processed, but Unclassified
Class 2 = Bare-earth Ground
Class 7 = Low point (noise)
Class 9 = Water
Class 10 = ignored ground (near a Breaklines)
Class 17 = Bridge Decks
LAS 1.4 format or as required by MOA Classification of the LiDAR point cloud in accordance with the following classification scheme: Class 1 = Processed, but Unclassified Class 2 = Bare-earth Ground Class 7 = Low point (noise) Class 9 = Water Class 10 = ignored ground (near a Breaklines) Class 17 = Bridge Decks
Any conclusions drawn from the analysis of this information are not the responsibility of Merrick, the Municipality of Anchorage, the NOAA Office for Coastal Management, or its partners.
Municipality of Anchorage, AK; Merrick & Co; McElhanney
ALS70 HP
Aircraft
Data Steward
2017-11-17
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Telephone: 843-740-1202
Email: coastal.info@noaa.gov
Distributor
2017-11-17
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Telephone: 843-740-1202
Email: coastal.info@noaa.gov
Metadata Contact
2017-11-17
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Telephone: 843-740-1202
Email: coastal.info@noaa.gov
Originator
2015-05-10
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Point of Contact
2017-11-17
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Ground Condition
-150.286492
-148.773377
61.49475
60.732991
Range
2015-05-10
2015-05-31
Unclassified
Users may access the data from two links. Custom download and bulk download options are available.
None
Users should be aware that temporal changes may have occurred since this data set was collected and that some parts of these data may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of its limitations.
https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=8406
Link to custom download points, grids, or contours from the Data Access Viewer (DAV).
Zip
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/8406/index.html
Link to bulk download laz files in geographic coordinates and elevations in NAVD88 meters .
https://coast.noaa.gov/htdata/lidar2_z/geoid12b/data/8406/supplemental/ak2015_anchorage_m8406.kmz
Browse Graphic
kmz
This graphic displays the footprint for this lidar data set.
https://coast.noaa.gov/
Other
Link to the NOAA Office for Coastal Management (OCM) homepage.
https://coast.noaa.gov/dataregistry
Other
Link to the Digital Coast Data Registry where many types of coastal data are available for free download.
https://coast.noaa.gov/dataviewer
Other
Link to the Digital Coast Data Access Viewer (DAV) where elevation, imagery, and land cover data are available for free, custom download.
https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=8431
Other
Link to custom download the raster Digital Elevation Model (DEM) data from the Data Access Viewer (DAV).
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/8406/breaklines/index.html
Other
Link to download the breakline data.
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/8406/supplemental/ak2015_anchorage_m8406_lidar_report.pdf
Other
pdf
This lidar report provides accompanying information about the collection and processing of this lidar data set.
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/8406/supplemental/ak2015_anchorage_m8406_qc_report.pdf
Other
pdf
This QC report provides accompanying information about the quality of this lidar data set.
Microsoft Windows Vista Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 9.3.1.4095
This data set was produced to meet ASPRS Positional Accuracy Standards for Digital Geospatial Data (2014) for a 42.98 cm RMSEx / RMSEy Horizontal Accuracy Class which equates to Positional Horizontal Accuracy = +/- 74.68 cm at a 95% confidence level.
This data set was tested to meet ASPRS Positional Accuracy Standard for Digital Geospatial Data (2014) for a 10.0-cm RMSEz Vertical Accuracy Class. Actual NVA accuracy (55 NVA check points) was found to be RMSEz = 6.965 cm, equating to +/- 13.651 cm at the 95% confidence level. Actual VVA accuracy (45 VVA check points) was found to be +/- 15.180 cm at the 95th percentile.
This dataset contains unclassified returns of the LIDAR sensor. The sensor data was verified in MARS software to ensure complete coverage.
Calibrations of the LIDAR flightline data are performed; this process is known as boresighting. The flightlines are compared to evaluate both their relative and absolute accuracies.
Ground Control
2015-01-01
Discrete
2015
Lidar
2016-11-29
Range
2015-05-10
2016-09-29
Lidar
ftp://rockyftp.cr.usgs.gov/vdelivery/Datasets/Staged/NED/LPC/projects/USGS_LPC_AK_Anchorage_2015_LAS_2017/
1
LIDAR data was collected using McElhanney's ALS70 HP LIDAR sensor. The raw data was verified in MARS software for complete coverage of the project area, and boresighted to align the flightlines. Raw data files were parsed into manageable client-specific tiles. These tiles were then processed through automated filtering that separates the data into different classification groups: unclassified points, ground points, low points, water, ignored ground, Bridge Decks and Culverts. The data was next taken into MARS to reclassify the erroneous points that may remain in the LIDAR point cloud after auto filter.
2016-11-29T00:00:00
2
The NOAA Office for Coastal Management (OCM) downloaded the data in laz format from the USGS site on Nov 2, 2017 (ftp://rockyftp.cr.usgs.gov/vdelivery/Datasets/Staged/NED/LPC/projects/USGS_LPC_AK_Anchorage_2015_LAS_2017/) . The files contained lidar elevation and intensity measurements. The data were in UTM Zone 6 (NAD83) meters coordinates and NAVD88 (Geoid12a) elevations in meters. OCM did the following processing to the data for Digital Coast storage and provisioning purposes:
1. File names were changed to remove USGS_LPC_2017 and _LAS_2017 from the filenames.
2. Converted from UTM Zone 6 (NAD83) meters coordinates to geographic coordinates
3. Converted from NAVD88 elevations to NAD83(2011) ellipsoid elevations using Geoid12a grids
4. Copied the laz files to database and https
2017-11-15T00:00:00
Organization
Office for Coastal Management
OCM
2234 South Hobson Avenue
Charleston
SC
29405-2413
https://www.coast.noaa.gov/
Lidar
gov.noaa.nmfs.inport:50281
Rebecca Mataosky
2017-11-17T10:27:17
SysAdmin InPortAdmin
2023-08-15T17:09:43
2022-03-16
OCM Partners
OCMP
1002
Public
No
2022-03-16
1 Year
2023-03-16
Vector
G-polygon
2
Universal Transverse Mercator
6
0.999600
-147.000000
0.000000
500000.000000
0.000000
coordinate pair
0.001
0.001
meters
D_North_American_1983
Geodetic Reference System 80
6378137.000000
298.257222
North American Vertical Datum of 1988
.001
meters
Explicit elevation coordinate included with horizontal coordinates
LAS 1.4 format or as required by MOA
Classification of the LiDAR point cloud in accordance with the following classification scheme:
Class 1 = Processed, but Unclassified
Class 2 = Bare-earth Ground
Class 7 = Low point (noise)
Class 9 = Water
Class 10 = ignored ground (near a Breaklines)
Class 17 = Bridges Decks
Class 18 = Culverts
LAS 1.4 format or as required by MOA
Classification of the LiDAR point cloud in accordance with the following classification scheme:
Class 1 = Processed, but Unclassified
Class 2 = Bare-earth Ground
Class 7 = Low point (noise)
Class 9 = Water
Class 10 = ignored ground (near a Breaklines)
Class 17 = Bridges Decks
Class 18 = Culverts