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Physical Location
Data Set Info
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Spatial Info
Access Info
Distribution Info
URLs
Activity Log
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Lineage
Catalog Details

Summary

Browse Graphic

Short Citation
OCM Partners, 2024: 2009 National Renewable Energy Laboratory/Boston Redevelopment Authority Topographic LiDAR: Boston, Massachusetts, https://www.fisheries.noaa.gov/inport/item/49772.
Full Citation Examples

Abstract

The Alliance for Sustainable Energy, LLC contracted with Sanborn to provide LiDAR mapping services for the Boston area.

Utilizing multi-return systems, Light Detection and Ranging (LiDAR) data in the form of 3-dimensional positions of a dense

set of mass points was collected for approximately 90 square miles. All systems consist of geodetic GPS positioning,

orientation derived from high-end inertial sensors and high-accurate lasers. The sensor is attached to the aircraft's underside and emits rapid pulses of light that are used to determine distances between the plane and terrain below.

Specifically, the Leica ALS-50 LiDAR system was used to collect data for the survey campaign. The LiDAR system is calibrated by

conducting flight passes over a known ground surface before and after each LiDAR mission. During final data processing, the

calibration parameters are inserted into post-processing software.

Lidar Acquisition Parameters:

Instrument: Leica ALS50

Flight Altitude: near 1500m AGL

Airspeed: near 120 Knots

Scan Frequency: 46 Hertz

Pulse Rate: 74,400 Hertz

Scan Width Half Angle: 25 Degrees

Sidelap: 30 percent

This Lidar survey achieved a point spacing of 1.0 meter.

Distribution Information

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

  • Simple download of data files.

Access Constraints:

None

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.

Controlled Theme Keywords

elevation

Child Items

No Child Items for this record.

Contact Information

Point of Contact
NOAA Office for Coastal Management (NOAA/OCM)
coastal.info@noaa.gov
(843) 740-1202

Metadata Contact
NOAA Office for Coastal Management (NOAA/OCM)
coastal.info@noaa.gov
(843) 740-1202

Extents

Geographic Area 1

-71.196495° W, -70.859306° E, 42.410028° N, 42.223388° S

Time Frame 1
2009-11-10 - 2009-11-11

Item Identification

Title: 2009 National Renewable Energy Laboratory/Boston Redevelopment Authority Topographic LiDAR: Boston, Massachusetts
Short Name: ma2009_ase_boston_m2575_metadata
Status: Completed
Publication Date: 2013-09
Abstract:

The Alliance for Sustainable Energy, LLC contracted with Sanborn to provide LiDAR mapping services for the Boston area.

Utilizing multi-return systems, Light Detection and Ranging (LiDAR) data in the form of 3-dimensional positions of a dense

set of mass points was collected for approximately 90 square miles. All systems consist of geodetic GPS positioning,

orientation derived from high-end inertial sensors and high-accurate lasers. The sensor is attached to the aircraft's underside and emits rapid pulses of light that are used to determine distances between the plane and terrain below.

Specifically, the Leica ALS-50 LiDAR system was used to collect data for the survey campaign. The LiDAR system is calibrated by

conducting flight passes over a known ground surface before and after each LiDAR mission. During final data processing, the

calibration parameters are inserted into post-processing software.

Lidar Acquisition Parameters:

Instrument: Leica ALS50

Flight Altitude: near 1500m AGL

Airspeed: near 120 Knots

Scan Frequency: 46 Hertz

Pulse Rate: 74,400 Hertz

Scan Width Half Angle: 25 Degrees

Sidelap: 30 percent

This Lidar survey achieved a point spacing of 1.0 meter.

Purpose:

This LiDAR operation was designed to create a data sets that will establish an authoritative source for elevation information

for the city of Boston.

Notes:

10416

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/geoid18/2575/supplemental/ma2009_ase_boston_footprint.kmz

A Lidar Report from the vendor for this data set may be viewed here:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2575/supplemental/ma2009_ase_boston_lidarreport.pdf

Keywords

Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
elevation
UNCONTROLLED
None LAZ

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:

LiDAR points in LAZ format (ASPRS Classes 1,2,7,12)

Entity Attribute Detail Citation:

none

Distribution Liability:

Any conclusions drawn from the analysis of this information are not the responsibility of Sanborn Map Company, the National Renewable Energy Laboratory,

the Boston Redevelopment Authority, the Alliance for Sustainable Energy LLC, NOAA, the Office for Coastal Management or its partners.

Data Set Credit: Please credit the National Renewable Energy Laboratory, the Alliance for Sustainable Energy, LLC and the Boston Redevelopment Authority for all products derived from this data. The data set was produced by the Sanborn Map Company.

Support Roles

Data Steward

CC ID: 676391
Date Effective From: 2013-09
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: 676393
Date Effective From: 2013-09
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: 676394
Date Effective From: 2013-09
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: 676392
Date Effective From: 2013-09
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: 1134712
W° Bound: -71.196495
E° Bound: -70.859306
N° Bound: 42.410028
S° Bound: 42.223388

Extent Group 1 / Time Frame 1

CC ID: 1134711
Time Frame Type: Range
Start: 2009-11-10
End: 2009-11-11

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/#/lidar/search/where:ID=2575

;

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: 741258
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=2575
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: 741259
Download URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2575/index.html
Distributor:
File Name: Bulk Download
Description:

Simple download of data files.

URLs

URL 1

CC ID: 741261
URL: https://coast.noaa.gov/dataviewer
URL Type:
Online Resource

URL 2

CC ID: 741262
URL: https://coast.noaa.gov
URL Type:
Online Resource

URL 3

CC ID: 741263
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2575/supplemental/ma2009_ase_boston_footprint.kmz
Name: Browse Graphic
URL Type:
Browse Graphic
File Resource Format: kmz
Description:

This graphic shows the lidar coverage for the cities of Boston and Cambridge, Massachusetts.

Activity Log

Activity Log 1

CC ID: 676412
Activity Date/Time: 2016-05-23
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 676411
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: 718339
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 741260
Activity Date/Time: 2018-03-13
Description:

Partial upload to move data access links to Distribution Info.

Data Quality

Accuracy:

Elevations are recorded in floating-point meters and the vertical datum is ellipsoidal (GEOID03).

Horizontal Positional Accuracy:

Project specifications required a horizontal accuracy of 1.0 meter or greater in order to meet FEMA guidelines for Lidar-based DEMs.

Vertical Positional Accuracy:

Vertical testing of this data set does not meet NSSDA/ASPRS guidelines for vertical accuracy reporting. Until industry standard

vertical accuracy testing is conducted the accuracy cannot be assumed better than the project specification of 15cm RMSEz in bare

areas, 30cm RMSEz in vegetated areas. Please note that the vertical accuracy value in the Lidar Report found above in the

Supplemental_Information section above were collected by Sanborn for their own internal accuracy assessments.

; Quantitative Value: 0.15 meters, Test that produced the value: Root mean square Z error in bare areas. Units in meters.

Completeness Report:

Elevation data has been collected for all areas inside project boundaries. The data set was flown with a 30% sidelap between flightlines.

Conceptual Consistency:

Data was reviewed by vendor to guarentee: 95% Artifact Removal, 98% Outlier Removal, 97% Vegetation Removal, 99% Building Removal.

Additionally, NOAA OCM reviewed each las tile's extent and statistics (including high/low elevations) to check for outliers, data voids,

blunders, etc. None were found by NOAA OCM.

Lineage

Process Steps

Process Step 1

CC ID: 1134708
Description:

Sanborn Map Company performed:

1. Pre and post-flight sensor calibration tests

2. Data collection

3. Data accuracy validation

4. Final Lidar processing

For detailed information regarding Sanborn's lidar processing steps please see the Lidar Report in the Supplemental_Information section

above for a detailed accuracy report.

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

Process Step 2

CC ID: 1134709
Description:

The NOAA Office for Coastal Management (OCM) received topographic files in .las V1.1 format. The files contained lidar elevation measurements, intensity

measurements, classification information, flightline information and return information. The data were received in Massachusetts State Plane Mainland

Zone 2001, NAD83 coordinates 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 converted from las V1.1 to las V1.2.

2. The topographic las files' GPS Week Time was converted to Adjusted Standard GPS Time.

3. The topographic las files were converted from orthometric (NAVD88) heights to ellipsoidal heights using Geoid03.

4. The topographic las files were converted from a Projected Coordinate System (MA SP Mainland) to a Geographic Coordinate System (NAD83).

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

6. The topographic las files' horizontal units were converted from feet to decimal degrees.

Process Date/Time: 2013-09-01 00:00:00

Catalog Details

Catalog Item ID: 49772
GUID: gov.noaa.nmfs.inport:49772
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