Short Citation:
Office for Coastal Management, 2021: 2004 Alaska Lidar Mapping, https://www.fisheries.noaa.gov/inport/item/48143.

Item Identification

Title: 2004 Alaska Lidar Mapping
Short Name: ak2004_m23_metadata
Status: Completed
Publication Date: 2006-03-22
Abstract:

The data sets are generated using the OPTECH ALTM 70 kHz LIDAR system mounted onboard AeroMap's twin-engine

Cessna 320 aircraft. Classified data sets such as this one may have varying posting due to some LIDAR pulses not

reaching the ground caused by data anomalies. Accuracy statements are based on areas of moderate terrain. Diminished

accuracies are to be expected in areas of extreme terrain and dense vegetation. The accuracy of each point is expected

to meet the vertical accuracy standard; however, derived products may be less accurate in extreme terrain and dense

vegetation due to a lesser number of points defining the bare-earth in these areas. The data were QA/QC'ed but some

data holidays still exist. This data represents the last return data only.

Original contact information:

Contact Org: NOAA Office for Coastal Management

Phone: 843-740-1202

Email: coastal.info@noaa.gov

Purpose:

The purpose of this data set is to provide a source for current and accurate digital elevation models (DEM) with

vertical accuracy's of 30cm root mean square error (RMSE) or better. These data were acquired at flying heights of 1200

and 2000 meters Above Mean Terrain (AMT) with post spacing planned for 1 and 2 meters. This data is not recommended for

design mapping or engineering. A DEM is used as a fundamental layer of information in Geographic Information Systems (GIS).

A number of the priority layers of spatial information recognized by the National Spatial Data Infrastructure may be derived

from LIDAR DEMs, including elevation, hydrography, slope, aspect, and shoreline delineation.

Notes:

10166

Supplemental Information:

The survey reports for 2004 Alaska Lidar Mapping may be viewed at:

https://coast.noaa.gov/htdata/lidar1_z/geoid12a/data/23/supplemental

There are two reports, one for area ak0301 (Shishmaref) and one for area ak0302 (Kivalina).

Keywords

Theme Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Science Keywords Earth Science > Land Surface > Topography > Terrain Elevation > Topographical Relief Maps
Global Change Master Directory (GCMD) Science Keywords Earth Science > Oceans > Bathymetry/Seafloor Topography > Seafloor Topography
Global Change Master Directory (GCMD) Science Keywords Earth Science > Oceans > Coastal Processes > Coastal Elevation
ISO 19115 Topic Category elevation
None Bathymetry/Topography
None Cartography
None DEM
None DSM
None DTM
None Elevation
None Geodesy
None Geography
None Height
None Hydrography
None Interferometric
None Laser
None LIDAR
None Mapping
None Photogrammetry
None Radar
None Remote
None Sensing
None Stereophotogrammetry
None Terrain

Temporal Keywords

Thesaurus Keyword
None 2004
None August
None July

Spatial Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Location Keywords Continent > North America > United States Of America > Alaska
None Alaska
None Cape Espenburg
None Cape Krusenstern
None Cape Seppings
None Cape Thompson
None Kivilina
None Kotzebue
None Point Hope
None Seward Peninsula
None Shishmaref
None USA
None Wales

Stratum Keywords

Thesaurus Keyword
None Bald
None Earth
None First
None Ground
None Surface
None Terrain

Physical Location

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

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: Unknown
Distribution Liability:

Any conclusions drawn from analysis of this information are not the responsibility of NOAA, the Office for Coastal Management or its partners.

Data Set Credit: This data set was developed for the NOAA OCM by AeroMap US.

Support Roles

Data Steward

CC ID: 622254
Date Effective From: 2006-03-22
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: 622256
Date Effective From: 2006-03-22
Date Effective To:
Contact (Organization): Office for Coastal Management (OCM)
Address: 2234 South Hobson Avenue
Charleston, SC 29405-2413
URL: https://www.coast.noaa.gov/

Metadata Contact

CC ID: 622257
Date Effective From: 2006-03-22
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: 622255
Date Effective From: 2006-03-22
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: 622265
W° Bound: -168.530215
E° Bound: -162.633189
N° Bound: 68.35997
S° Bound: 65.594656

Extent Group 1 / Time Frame 1

CC ID: 622259
Time Frame Type: Discrete
Start: 2004-07-21

Extent Group 1 / Time Frame 2

CC ID: 622260
Time Frame Type: Discrete
Start: 2004-07-22

Extent Group 1 / Time Frame 3

CC ID: 622261
Time Frame Type: Discrete
Start: 2004-08-01

Extent Group 1 / Time Frame 4

CC ID: 622262
Time Frame Type: Discrete
Start: 2004-08-05

Extent Group 1 / Time Frame 5

CC ID: 622263
Time Frame Type: Discrete
Start: 2004-08-06

Extent Group 1 / Time Frame 6

CC ID: 622264
Time Frame Type: Discrete
Start: 2004-08-11

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: 743617
Download URL: https://coast.noaa.gov/htdata/lidar1_z/geoid12a/data/23
Distributor: Office for Coastal Management (OCM) (2006-03-22 - Present)
File Name: Bulk Download
Description:

Simple download of data files.

File Type: LAZ

Distribution 2

CC ID: 743616
Start Date: 2019-07-01
End Date: Present
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=23
Distributor: Office for Coastal Management (OCM) (2006-03-22 - Present)
File Name: Customized Download
Description:

Create custom data files by choosing data area, product type, map projection, file format, datum, etc.

File Type: Zip

URLs

URL 1

CC ID: 743619
URL: https://coast.noaa.gov/dataviewer
URL Type:
Online Resource

URL 2

CC ID: 743620
URL: https://coast.noaa.gov
URL Type:
Online Resource

Activity Log

Activity Log 1

CC ID: 622313
Activity Date/Time: 2016-05-23
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 622312
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: 717595
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 743618
Activity Date/Time: 2018-03-13
Description:

Partial upload to move data access links to Distribution Info.

Data Quality

Horizontal Positional Accuracy:

All data products were processed to meet 0.6 & 1.0 meters RMSE or better in horizontal

accuracy.

Vertical Positional Accuracy:

All data products were processed to meet 30cm RMSE or better in vertical accuracy.

We recommend a ground quality control check of the data set. This data is not recommended for design grade mapping or

engineering.

Completeness Measure:

Cloud Cover: 0

Completeness Report:

Complete

Conceptual Consistency:

Unknown

Lineage

Sources

Lidar point cloud

CC ID: 858244
Contact Role Type: Originator
Contact Type: Organization
Contact Name: Aeromap

Process Steps

Process Step 1

CC ID: 622245
Description:

The raw points for the point cloud data product were captured using AeroMap U.S.'s twin-engine Cessna equipped with our OPTECH ALTM 70 kHz LIDAR data acquisition system. The system includes differential GPS and inertial measurement systems to provide superior accuracy. The flying height is 1200 & 2000 meters Above Mean Terrain (AMT). These data were post-processed utilizing Optech's REALM (Version 3.5.4) software, which applies AeroMap U.S.'s Applanix Inertial Measurement Unit (IMU) values to the acquired Airborne Global Positioning Systems (ABGPS) data. These results are then applied to the acquired LIDAR data points and output to a LIDAR accuracy standard (LAS) format in a WGS 84, Universal Transverse Mercator (UTM), Zone 3, Meters coordinate system. Using Bentley's Microstation V8 LIDAR these data were imported in LAS format. Using TerraSolid's TerraScan (version 6.04) software, these data were imported into a TerraScan project files (PRJ) and converted (on import) to a binary files, no data were classified, all original "point cloud" data as output from REALM. These data were then output to the deliverable ASCII, space delimited, CTIXYZ format, (see attribute section for explanation of ASCII file syntax).

Process Date/Time: 2006-03-24 00:00:00

Process Step 2

CC ID: 622246
Description:

Created initial metadata

Process Date/Time: 2006-03-24 00:00:00
Source: Lidar point cloud

Process Step 3

CC ID: 622247
Description:

The NOAA Office for Coastal Management (OCM) received files in LAS format. The files contained lidar intensity and elevation measurements. OCM performed the following processing on the data to make it available within the Lidar Data Retrieval Tool (LDART):

1. All data points in the ASCII files were projected geographic decimals degrees using the USGS General Cartographic

Transformation Package (GCTP) software.

2. All ASCII files containing points collected on the same date were combined into a single file and sorted by latitude.

3. The sorted files were then converted to binary LAS files and the las header fields were updated.

4. Data was QA/QC'ed and many points removed - there still remains several 'data holidays' as unique outliers in otherwise

ordered areas. They can be manually edited by user if required. This data represents the last return data only.

Process Date/Time: 2007-02-09 00:00:00
Process Contact: Office for Coastal Management (OCM)
Source: Lidar point cloud

Child Items

Rubric scores updated every 15m

Rubric Score Type Title
Entity (ENT) *.xyz
Entity (ENT) C
Entity (ENT) I
Entity (ENT) T
Entity (ENT) X
Entity (ENT) Y
Entity (ENT) Z

Catalog Details

Catalog Item ID: 48143
Metadata Record Created By: Anne Ball
Metadata Record Created: 2017-11-14 14:19+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2019-07-02 15:17+0000
Metadata Record Published: 2018-03-13
Owner Org: OCM
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Next Review Date: 2019-03-14