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Short Citation:
OCM Partners, 2022: 2004 Federal Emergency Management Agency (FEMA) Bare Earth Topographic LiDAR: Connecticut River, https://www.fisheries.noaa.gov/inport/item/49653.

Item Identification

Title: 2004 Federal Emergency Management Agency (FEMA) Bare Earth Topographic LiDAR: Connecticut River
Short Name: ct2004_fema_connecticutriver_m1473_metadata
Status: Completed
Publication Date: 2013-04
Abstract:

LiDAR data is remotely sensed high-resolution elevation data collected by an airborne collection platform. The LiDAR files were converted from .PTS format to LAS V1.2. All data is Bare Earth,

with 99% of all buildings removed and 95% of all vegetation removed. There is no information available for return number, scan angle, GPS time, or intensity.

This data set covers approximately 1,233.83 square miles (3,195.6 sq km) of the Connecticut River.

Purpose:

The purpose of this LiDAR data was to produce high accuracy 3D elevation based geospatial products for coastal flood mapping.

Notes:

10297

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/geoid18/1473/supplemental/ct2004_fema_connecticutriver_footprint.KMZ

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:

Bare earth LiDAR point data in LAS 1.2 format

Entity Attribute Detail Citation:

None

Distribution Liability:

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

of Spectrum Mapping LLC, FEMA, NOAA, the Office for Coastal Management or its partners.

Support Roles

Data Steward

CC ID: 671408
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: 671410
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: 671411
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: 671409
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: 1133624
W° Bound: -72.693735
E° Bound: -72.247097
N° Bound: 42.031316
S° Bound: 41.256891

Extent Group 1 / Time Frame 1

CC ID: 1133623
Time Frame Type: Range
Start: 2004-05-12
End: 2004-06-16

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=1473

;

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: 740567
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=1473
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: 740568
Download URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/1473/index.html
Distributor:
File Name: Bulk Download
Description:

Simple download of data files.

URLs

URL 1

CC ID: 740570
URL: https://coast.noaa.gov/dataviewer
URL Type:
Online Resource

URL 2

CC ID: 740571
URL: https://coast.noaa.gov
URL Type:
Online Resource

Activity Log

Activity Log 1

CC ID: 671426
Activity Date/Time: 2016-05-23
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 671425
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: 718200
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 740569
Activity Date/Time: 2018-03-13
Description:

Partial upload to move data access links to Distribution Info.

Data Quality

Accuracy:

Raw elevation measurements have been tested to 0.15 meters vertical accuracy at 95 percent confidence level.

Vertical Positional Accuracy:

The data received by the NOAA Office for Coastal Management lacking substantial portions of metadata. The stated RMSEz is given below, but no description of accuracy testing was given.; Quantitative Value: 0.15 meters, Test that produced the value: Value in meters. Tested vertical root mean square error (RMSEz).

Completeness Report:

While the NOAA Office for Coastal Management makes every effort to provide accurate and complete information, OCM provides no guarantee as to the accuracy, reliability or completeness of

this data set. Please note OCM received this data from an outside source and is only distributing the data publicly.

Conceptual Consistency:

All LiDAR files delivered were verified using commercial GIS software by the NOAA Office for Coastal Management to ensure they open and are positioned properly.

Lineage

Process Steps

Process Step 1

CC ID: 1133621
Description:

The NOAA Office for Coastal Management (OCM) received the topographic files in .PTS format. The files contained lidar elevation measurements.

The data were received in Connecticut State Plane coordinates, NAD83 (Zone 0600) and were vertically referenced to NAVD88 using the Geoid99 model. The vertical units of the data were feet.

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

1. The .PTS files were converted to LAS V1.2

2. All points were set to Class 2 (Bare Earth)

3. The topographic las files were converted from a Projected Coordinate System (Connecticut State Plane) to a Geographic Coordinate system (NAD83).

4. The topographic las files' horizontal units were converted from US survey feet to decimal degrees.

5. The topographic las files were converted from orthometric (NAVD88) heights to ellipsoidal heights using Geoid99.

6. The topographic las files' vertical units were converted from survey feet to meters.

Process Date/Time: 2013-03-01 00:00:00

Catalog Details

Catalog Item ID: 49653
GUID: gov.noaa.nmfs.inport:49653
Metadata Record Created By: Anne Ball
Metadata Record Created: 2017-11-15 15:21+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