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Short Citation:
OCM Partners, 2022: 2009 U.S. Geological Survey (USGS) Topographic LiDAR: Androscoggin County, Maine, https://www.fisheries.noaa.gov/inport/item/49789.

Item Identification

Title: 2009 U.S. Geological Survey (USGS) Topographic LiDAR: Androscoggin County, Maine
Short Name: me2009_usgs_androscoggin_m2480_metadata
Status: Completed
Publication Date: 2013-04
Abstract:

USGS Contract Number: G10PC00026

USGS Task Order: G10PD01737

LiDAR was collected at a 1.0 points per square meter (1.0m GSD) for the county of Androscoggin, Maine while no snow was on the ground and rivers were at

or below normal levels and prior to leaf-on conditions.

Purpose:

One meter point spacing LiDAR data collection provides the information to create Intensity Images, Break Lines, Raster DEMs, and fully Classified LiDAR LAS files.

Notes:

10433

Supplemental Information:

A footprint of this data set may be viewed in Google Earth at:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2480/supplemental/me2009_usgs_androscoggin_footprint.KMZ

A project report of this data set may be viewed at:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2480/supplemental/me2009_usgs_androscoggin_projectreport.doc

Keywords

Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
elevation

Physical Location

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

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: As Needed
Data Presentation Form: las
Entity Attribute Overview:

LAS V1.1

Entity Attribute Detail Citation:

LAS files meet specifications in Project Report listed above in "Supplemental_Information"

Distribution Liability:

Any conclusions drawn from the analysis of this information are not the responsibility

of USGS, FEMA, STARR, Photo Science, NOAA, the Office for Coastal Management or its partners.

Data Set Credit: Photo Science, Inc. flew the LiDAR and processed the data.

Support Roles

Data Steward

CC ID: 677190
Date Effective From: 2013-04
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: 677192
Date Effective From: 2013-04
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: 677193
Date Effective From: 2013-04
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: 677191
Date Effective From: 2013-04
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: 1133882
W° Bound: -70.405713
E° Bound: -69.986657
N° Bound: 44.493105
S° Bound: 43.90332

Extent Group 1 / Time Frame 1

CC ID: 1133881
Time Frame Type: Range
Start: 2009-11-17
End: 2009-12-02

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/#/lidar/search/where:ID=2480

;

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. These data depict the heights at the time of the survey and are only accurate for that time.

Distribution Information

Distribution 1

CC ID: 741344
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=2480
Distributor:
File Name: Customized Download
Description:

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

Distribution 2

CC ID: 741345
Download URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2480/index.html
Distributor:
File Name: Bulk Download
Description:

Simple download of data files.

URLs

URL 1

CC ID: 741347
URL: https://coast.noaa.gov/dataviewer
URL Type:
Online Resource

URL 2

CC ID: 741348
URL: https://coast.noaa.gov
URL Type:
Online Resource

Activity Log

Activity Log 1

CC ID: 677209
Activity Date/Time: 2016-05-23
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 677208
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: 718358
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 741346
Activity Date/Time: 2018-03-13
Description:

Partial upload to move data access links to Distribution Info.

Data Quality

Accuracy:

The project area requires LiDAR to be collected on average of 1 meter point spacing or better and vertical accuracy of 18.0 centimeters RMSE or better to support

2' contour generation when combined with breaklines.

Vertical Positional Accuracy:

Deliverables were tested by Photo Science for both vertical and horizontal accuracy. All data is seamless from one tile to the next, no gaps or no data areas.

The vertical unit of the data file is in meters.

; Quantitative Value: 0.10 meters, Test that produced the value: RMSEz in meters.

Completeness Report:

Datasets contain complete coverage of tiles.

Conceptual Consistency:

Deliverables were tested by Photo Science for both vertical and horizontal accuracy. All data is seamless from one tile to the next, no gaps or no data areas.

Lineage

Process Steps

Process Step 1

CC ID: 1133878
Description:

Leica software was used in the post processing of the airborne GPS and inertial data that is critical to the positioning of the sensor during all flights. This software

suite includes Applanix's PosPac and Waypoint's GrafNav solutions. PosPac provides the smoothed best estimate of trajectory (SBET) that is necessary for Leica's post processor

to develop the point cloud from the LiDAR missions. The point cloud is the mathematical three dimensional collection of all returns from all laser pulses as determined from the

aerial mission. At this point this data is ready for analysis, classification, and filtering to generate a bare earth surface model in which the above ground features are

removed from the data set.

The point cloud was manipulated within the Leica software; GeoCue, TerraScan, and TerraModeler software was used for the automated data classification, manual cleanup, and bare earth

generation from this data. Project specific macros were used to classify the ground and to remove the side overlap between parallel flight lines.

All data was manually reviewed and any remaining artifacts removed using functionality provided by TerraScan and TerraModeler.

Buffered LAS files were created in GeoCue to provide overedge to the DEM creation. These tiles were then run through automated scripting within ArcMap and were combined with the

Hydro Flattened Breaklines to create the 2.5 foot DEM. Final DEM tiles were clipped to the tile boundary to provide a seamless dataset.

ERDAS IMG files were then created as the project deliverable.

A manual QA review of the tiles was completed in ArcMap and Global Mapper to ensure full coverage with no gaps or slivers within the project area.

Process Date/Time: 2010-01-01 00:00:00

Process Step 2

CC ID: 1133879
Description:

The NOAA Office for Coastal Management (OCM) received topographic files in the compressed LAS.GZ format. The files contained lidar

elevation and intensity measurements. The data were received in Projected Coordinates (Maine State Plane West 1802)

and were vertically referenced to NAVD88 using the Geoid03 model. The vertical units of the data were

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

1. The topographic LAS files were uncompressed using gunzip.

2. The topographic LAS files were converted from Projected coordinates (Maine State Plane West) to Geographic Coordinates (NAD83).

3. The horizontal units of the topographic LAS files were converted from feet to decimal degrees.

4. The topographic LAS files were converted from orthometric (NAVD88) heights to ellipsoidal heights (NAD83) using Geoid03.

5. The vertical units of the topographic LAS files were converted from feet to meters.

Process Date/Time: 2013-04-01 00:00:00

Catalog Details

Catalog Item ID: 49789
GUID: gov.noaa.nmfs.inport:49789
Metadata Record Created By: Anne Ball
Metadata Record Created: 2017-11-15 15:22+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2022-08-09 17:11+0000
Metadata Record Published: 2022-03-16
Owner Org: OCMP
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2022-03-16
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2023-03-16