2008 City of Baltimore Lidar
Data Set (DS) | OCM Partners (OCMP)GUID: gov.noaa.nmfs.inport:49785 | Updated: August 9, 2022 | Published / External
Summary
Short Citation
OCM Partners, 2025: 2008 City of Baltimore Lidar, https://www.fisheries.noaa.gov/inport/item/49785.
Full Citation Examples
In the spring of 2008, the City of Baltimore expressed an interest to upgrade the City GIS Database with mapping quality airborne LiDAR data.
The City of Baltimore currently had in place a contract for mapping GIS/services with the KCI/Sanborn Joint Venture Partnership, L.L.C. under
Project 1051. The City of Baltimore issued Change Order #1 on on Project 1051 for the LiDAR acquisition and processing. KCI/Sanborn acquired
the LiDAR data over the City of Baltimore (approximately 90 square miles) during one long mission on 15 April 2008.
A Leica Airborne Airborne Laser Scanner Model ALS 50 was used in a Sanborn Aero Commander 500B (Registration N6172X) to acquire the data. The
airborne mission was flown 15 April 2008. The LiDAR system acquired calibration data the same day by conducting flight passes over a known
ground surface before and the LiDAR mission. During final data processing, the calibration parameters were used in the final post-processing
software.
The acquired LiDAR data were processed to obtain the following deliverables:
-DEMs of first and last returns and bare earth (all point data)
-LAS format data in a tile grid provided by the City/KCI
-Gridded DEM in ESRI format (Arc Binary Grid -Arc/INFO Lattice ) produced from Bare Earth Mass Points in 1-meter resolution (Grid size)
-Associated FGDC compliant metadata in XML format
The project specifications called for the LiDAR survey to comply with industry standard FEMA guidelines for accuracy. The FEMA requirement for
this type of mapping calls for vertical errors not to exceed 0.185 meter (0.61 feet) RMSE when compared with ground check points over open
flat terrain and 0.370 meter (1.22 feet) for other types of terrain. This accuracy requirement was comfortably met with comparing LiDAR
derived elevations against 50 ground control check points provided by KCI Technologies. These control points were photo control points used
as part of the photogrammetric mapping project and independent LiDAR checkpoints surveyed by KCI and Mercado after the data was delivered. The
RMSE error observed was 0.058 meter (0.189 feet) over all 50 check points.
Original contact information:
Contact Name: Josh Nimetz
Contact Org: KCI/Sanborn Joint Venture Partnership, L.L.C. (hereafter referred to as KCI/Sanborn)
Title: LiDAR Production Manager
Phone: 719-264-5513
Email: jnimetz@sanborn.com
Distribution Information
-
Create custom data files by choosing data area, product type, map projection, file format, datum, etc.
-
Simple download of data files.
None
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
https://coast.noaa.gov
Metadata Contact
NOAA Office for Coastal Management (NOAA/OCM)
coastal.info@noaa.gov
(843) 740-1202
https://coast.noaa.gov
Extents
-76.713701° W,
-76.526548° E,
39.372703° N,
39.195787° S
2008-04-15
Item Identification
Title: | 2008 City of Baltimore Lidar |
---|---|
Short Name: | md2008_baltimorecity_m1199_metadata |
Status: | Completed |
Publication Date: | 2012-07 |
Abstract: |
In the spring of 2008, the City of Baltimore expressed an interest to upgrade the City GIS Database with mapping quality airborne LiDAR data. The City of Baltimore currently had in place a contract for mapping GIS/services with the KCI/Sanborn Joint Venture Partnership, L.L.C. under Project 1051. The City of Baltimore issued Change Order #1 on on Project 1051 for the LiDAR acquisition and processing. KCI/Sanborn acquired the LiDAR data over the City of Baltimore (approximately 90 square miles) during one long mission on 15 April 2008. A Leica Airborne Airborne Laser Scanner Model ALS 50 was used in a Sanborn Aero Commander 500B (Registration N6172X) to acquire the data. The airborne mission was flown 15 April 2008. The LiDAR system acquired calibration data the same day by conducting flight passes over a known ground surface before and the LiDAR mission. During final data processing, the calibration parameters were used in the final post-processing software. The acquired LiDAR data were processed to obtain the following deliverables: -DEMs of first and last returns and bare earth (all point data) -LAS format data in a tile grid provided by the City/KCI -Gridded DEM in ESRI format (Arc Binary Grid -Arc/INFO Lattice ) produced from Bare Earth Mass Points in 1-meter resolution (Grid size) -Associated FGDC compliant metadata in XML format The project specifications called for the LiDAR survey to comply with industry standard FEMA guidelines for accuracy. The FEMA requirement for this type of mapping calls for vertical errors not to exceed 0.185 meter (0.61 feet) RMSE when compared with ground check points over open flat terrain and 0.370 meter (1.22 feet) for other types of terrain. This accuracy requirement was comfortably met with comparing LiDAR derived elevations against 50 ground control check points provided by KCI Technologies. These control points were photo control points used as part of the photogrammetric mapping project and independent LiDAR checkpoints surveyed by KCI and Mercado after the data was delivered. The RMSE error observed was 0.058 meter (0.189 feet) over all 50 check points. Original contact information: Contact Name: Josh Nimetz Contact Org: KCI/Sanborn Joint Venture Partnership, L.L.C. (hereafter referred to as KCI/Sanborn) Title: LiDAR Production Manager Phone: 719-264-5513 Email: jnimetz@sanborn.com |
Purpose: |
This LIDAR operation was designed to provide a high density set of masspoints within the defined areas. The data sets are suitable for the development of contours for use in hydraulic/hydrologic model development, and for assessing environmental impacts. Typical uses for the dataset include FEMA Flood Map Modernization, DFIRM map updates, watershed delineation and other hydro studies per FEMA specifications, as well as general use by the City of Baltimore. |
Notes: |
10429 |
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/geoid18/1199/supplemental/2008_City_of_Baltimore_Lidar.kmz A detailed description of this dataset can be found in the Final Project Report, found here: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/1199/supplemental/2008_City_of_Baltimore_Lidar_QA_Report.pdf |
Keywords
Theme Keywords
Thesaurus | Keyword |
---|---|
ISO 19115 Topic Category |
elevation
|
UNCONTROLLED | |
None | Drainage Area |
Temporal Keywords
Thesaurus | Keyword |
---|---|
UNCONTROLLED | |
None | 2008 |
None | April |
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 |
Distribution Liability: |
Any conclusions drawn from the analysis of this information are not the responsibility of the Office for Coastal Management or its partners. |
Support Roles
Data Steward
Date Effective From: | 2012-07 |
---|---|
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
Date Effective From: | 2012-07 |
---|---|
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
Date Effective From: | 2012-07 |
---|---|
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
Date Effective From: | 2012-07 |
---|---|
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
W° Bound: | -76.713701 | |
---|---|---|
E° Bound: | -76.526548 | |
N° Bound: | 39.372703 | |
S° Bound: | 39.195787 |
Extent Group 1 / Time Frame 1
Time Frame Type: | Discrete |
---|---|
Start: | 2008-04-15 |
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; |
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
Download URL: | https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=1199 |
---|---|
Distributor: | |
File Name: | Customized Download |
Description: |
Create custom data files by choosing data area, product type, map projection, file format, datum, etc. |
Distribution 2
Download URL: | https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/1199/index.html |
---|---|
Distributor: | |
File Name: | Bulk Download |
Description: |
Simple download of data files. |
URLs
URL 1
URL: | https://coast.noaa.gov/dataviewer |
---|---|
URL Type: |
Online Resource
|
URL 2
URL: | https://coast.noaa.gov |
---|---|
URL Type: |
Online Resource
|
Activity Log
Activity Log 1
Activity Date/Time: | 2016-05-23 |
---|---|
Description: |
Date that the source FGDC record was last modified. |
Activity Log 2
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
Activity Date/Time: | 2018-02-08 |
---|---|
Description: |
Partial upload of Positional Accuracy fields only. |
Activity Log 4
Activity Date/Time: | 2018-03-13 |
---|---|
Description: |
Partial upload to move data access links to Distribution Info. |
Technical Environment
Description: |
Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 2; ESRI ArcCatalog 9.3.0.1770 |
---|
Data Quality
Horizontal Positional Accuracy: |
The project specifications called for the LiDAR survey to comply with industry standard FEMA guidelines for horizontal accuracy. ; Quantitative Value: 1.0 meters, Test that produced the value: Assumed to meet FEMA specifications for horizontal accuracy. |
---|---|
Vertical Positional Accuracy: |
The FEMA requirements call for vertical errors not to exceed 0.185 meter (0.61 feet) RMSE when compared with ground check points over open flat terrain. ; Quantitative Value: 0.058 meters, Test that produced the value: The LiDAR derived elevations for this project compared against 50 ground control check points showed the RMSE error observed was 0.058 meters. |
Completeness Report: |
None provided |
Conceptual Consistency: |
All LAS formatted LiDAR data are validated to ensure that data on delivery media is in correct physical format and is readable and correctly georeferenced and projected. Note that LiDAR intensity is not calibrated or normalized. |
Lineage
Process Steps
Process Step 1
Description: |
Using a Leica Geosystems ALS50 Light Detection And Ranging (LiDAR) system, 29 flight lines of an average density of 1.0 meter ground sample distance, data were collected over areas in Baltimore City, MD (approximately 90 square miles). Multiple returns were recorded for each laser pulse along with an intensity value for each return. The data acquisition occurred in 1 mission on April 15, 2008. During the LIDAR campaign, the Sanborn field crew conducted a GPS field survey to establish final coordinates of the ground base stations for final processing of the base-remote GPS solutions. Airborne GPS data was differentially processed and integrated with the post processed IMU data to derive a Smoothed Best Estimate of Trajectory (SBET). The SBET was used to reduce the LiDAR slant range measurements to a raw reflective surface for each flight line. The overlap between flight lines was removed to provide a homogeneous coverage, and the coverage was classified to extract a bare earth digital elevation model (DEM). Airborne GPS is differentially processed using the GrafNAV V7.50 software by Waypoint Consulting of Calgary, Alberta, Canada. The PDOP and distance separation is as follows: The classification and quality control (QC) of LiDAR data is carried out using TerraScan software by Terrasolid Limited of Helinski, Finland. IMU data provides information concerning roll, pitch and yaw of collection platform during collection event. IMU information allows the pulse vector to be properly placed in 3D space allowing the distance from the aircraft reference point to be properly positioned on the elevation model surface. The IMU data is processed using the PosPac V4.2 software by Applanix Corporation of Richmond Hill, Ontario, Canada. The reflective surface is derived using the ALS Post Processor software by Leica Geosystems GIS & Mapping Division of Atlanta, Georgia. |
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Process Date/Time: | 2008-04-15 00:00:00 |
Process Step 2
Description: |
The NOAA Office for Coastal Management (OCM) received data in LAS v1.1 format. The files contained LiDAR elevation and intensity measurements. The data were received in state plane coordinates (Maryland; NAD83) and vertically referenced to NAVD88 using the Geoid03 model. The vertical units of data were feet. The data were classified according to ASPRS LAS classification scheme (0 = never classified, 1 = unclassified, 2 = ground 3 = low vegetation, 7 = noise, 12 = overlap). OCM performed the following processing for data storage and Digital Coast provisioning purposes: 1. The data were converted from state plane coordinates to geographic coordinates (NAD83). 2. The data were converted from orthometric heights to ellipsoidal heights (GRS80) using Geoid 03. 3. The vertical units of the data were changed from feet to meters. 2. The LAS data were sorted by latitude and the headers were updated. |
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Process Date/Time: | 2012-07-01 00:00:00 |
Catalog Details
Catalog Item ID: | 49785 |
---|---|
GUID: | gov.noaa.nmfs.inport:49785 |
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 |