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(NMMR Metadata gov.noaa.csc.maps:md2002)
Metadata:
Identification Information:
Dataset Identifier:
gov.noaa.csc.maps:md2002
Citation:
Citation Information:
Originator:
DOC/NOAA/NOS/CSC/CRS > Coastal Remote Sensing Program, Coastal
Services Center, National Ocean Service, NOAA, U.S. Department
of Commerce
Publication Date:
20061018
Title:
2003 Maryland LIDAR mapping project
Other Citation Details:
1. Airborne 1 (flight firm)2. Computational Consulting Services,
LLC (processing firm)3. Spatial Systems Associates, Inc.
(post-processing firm)4. Dewberry & Davis (QA/QC firm)5.
Maryland Department of Natural Resources
Online Linkage:
http://www.csc.noaa.gov/lidar
Description:
Abstract:
Light Detection and Ranging (LiDAR) is a method of locating objects
on the ground
using aerial-borne equipment. It is similar to RADAR or SONAR in that
the two-way travel time of
an energy beam reflected off an object is precisely measured, but
this technology uses laser
light instead of radio or sound waves. This technology has proven
very useful in remote sensing
of the earth. It can be used for determining elevations of both the
earth's surface and items
(natural and man-made) on the surface. Analysis of LiDAR data is used
in detailed modeling of the
earth's surface for drainage and floodplain studies, determining how
a new structure will affect
views from various locations, shoreline erosion studies, and other
reasons. The bare earth mass
points data show the calculated elevation of the earth's surface (the
ground, without objects such
as trees or buildings). Mass points may appear to have "holes" with
no elevation values in areas
where the surface could not be determined, such as very dense forests
or urban areas.
Purpose:
The LiDAR-derived data were collected by the Maryland Department of
Natural Resources
in support of shore erosion studies along the shorelines of the
Chesapeake Bay. It also
supports the Federal Emergency Management Agency's specifications for
mapping floodplains. These
efforts required detailed elevation data and models, such as those
available from LiDAR sensing.
The data have also been made available to aid in other projects that
require detailed surface,
vegetation and/or structure elevations.
Time Period of Content:
Time Period Information:
Range of Dates/Times:
Beginning Date:
20020901
Beginning Time:
Unknown
Ending Date:
20030101
Ending Time:
Unknown
Currentness Reference:
ground condition
Status:
Progress:
Complete
Maintenance and Update Frequency:
None planned
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate:
-75.569660
East Bounding Coordinate:
-75.023956
North Bounding Coordinate:
38.468258
South Bounding Coordinate:
37.979873
Keywords:
Theme:
Theme Keyword Thesaurus:
None
Theme Keyword:
mass points
Theme Keyword:
LiDAR
Theme Keyword:
lidar
Theme Keyword:
elevation
Theme Keyword:
DEM
Theme Keyword:
elevation model
Theme Keyword:
digital elevation model
Theme Keyword:
surface model
Theme Keyword:
gridded DEM
Place:
Place Keyword Thesaurus:
None
Place Keyword:
MARYLAND
Place Keyword:
USA
Access Constraints:
none
Use Constraints:
The NOAA and Department of Natural Resources makes no warranty,
expressed or implied, as to the use or appropriateness of Spatial
Data, and there are no warranties of merchantability or fitness for a
particular purpose or use. The information contained in Spatial Data
is from publicly available sources, but no representation is made as
to the accuracy or completeness of Spatial Data. The Department of
Natural Resources shall not be subject to liability for human error,
error due to software conversion, defect, or failure of machines, or
any material used in the connection with the machines, including
tapes, disks, CD-ROMs or DVD-ROMs and energy. The Department of
Natural Resources shall not be liable for any lost profits,
consequential damages, or claims against the Department of Natural
Resources by third parties. The liability of the Department of
Natural Resources for damage regardless of the form of the action
shall not exceed any distribution fees that may have been paid in
obtaining Spatial Data.
Point of Contact:
Contact Information:
Contact Organization Primary:
Contact Organization:
Coastal Remote Sensing Program
Contact Position:
TCM Project Scientist
Contact Address:
Address Type:
mailing and physical address
Address:
2234 South Hobson Avenue
City:
Charleston
State or Province:
South Carolina
Postal Code:
29405
Country:
United States
Contact Voice Telephone:
(843) 740-1200
Contact Electronic Mail Address:
csc@csc.noaa.gov
Data Set Credit:
The 2003 Maryland LIDAR data were collected for the Maryland Department
of Natural Resources. Spatial Systems Associates, Inc. was the prime
contractor for this project. It partnered with Airborne 1
Corporation, Computational Consulting Services, Inc., NXL
Construction Services, Inc and Dewberry LLC. The following
organizations participated with DNR and its vendor in funding the
collecting and processing of the LIDAR data. They are: City of
Salisbury, Salisbury University, University of Maryland, Dorchester
County, Talbot County and the National Ocean and Atmospheric
Administration's (NOAA) Coastal Services Center (CSC).
Cross Reference:
Citation Information:
Originator:
Spatial Systems Associates, Inc.
Publication Date:
20031130
Title:
LIDAR 2003 First_Last Returns
Geospatial Data Presentation Form:
model
Series Information:
Series name:
Maryland LIDAR
Issue Identification:
2003
Publication Information:
Publication Place:
Annapolis, Maryland
Publisher:
Maryland Department of Natural Resources
Other Citation Details:
1. Airborne 1 (flight firm) 2. Computational Consulting Services,
LLC (processing firm) 3. Spatial Systems Associates, Inc.
(post-processing firm) 4. Dewberry & Davis (QA/QC firm)
Online Linkage:
Cross Reference:
Citation Information:
Originator:
Spatial Systems Associates, Inc.
Publication Date:
20031130
Title:
LIDAR 2003 Gridded DEM
Geospatial Data Presentation Form:
model
Series Information:
Series name:
Maryland LIDAR
Issue Identification:
2003
Publication Information:
Publication Place:
Annapolis, Maryland
Publisher:
Maryland Department of Natural Resources
Other Citation Details:
1. Airborne 1 (flight firm) 2. Computational Consulting Services,
LLC (processing firm) 3. Spatial Systems Associates, Inc.
(post-processing firm) 4. Dewberry & Davis (QA/QC firm)
Online Linkage:
Cross Reference:
Citation Information:
Originator:
Spatial Systems Associates, Inc.
Publication Date:
20031130
Title:
LIDAR 2003 Intensity Imagery
Geospatial Data Presentation Form:
remote-sensing image
Series Information:
Series name:
Maryland LIDAR
Issue Identification:
2003
Publication Information:
Publication Place:
Annapolis, Maryland
Publisher:
Maryland Department of Natural Resources
Other Citation Details:
1. Airborne 1 (flight firm) 2. Computational Consulting Services,
LLC (processing firm) 3. Spatial Systems Associates, Inc.
(post-processing firm) 4. Dewberry & Davis (QA/QC firm)
Online Linkage:
Cross Reference:
Citation Information:
Originator:
Spatial Systems Associates, Inc.
Publication Date:
20031130
Title:
LIDAR 2002 Bare Earth Mass Points
Geospatial Data Presentation Form:
model
Series Information:
Series name:
Maryland LIDAR
Issue Identification:
2002
Publication Information:
Publication Place:
Annapolis, Maryland
Publisher:
Maryland Department of Natural Resources
Other Citation Details:
1. 3Di, Inc. (flight firm) 2. Airborne 1 (flight firm) 2.
Computational Consulting Services, LLC (processing firm) 3.
Spatial Systems Associates, Inc. (post-processing firm) 4.
Dewberry & Davis (QA/QC firm)
Online Linkage:
Cross Reference:
Citation Information:
Originator:
Maryland Department of Natural Resources
Publication Date:
20040527
Publication Time:
Unknown
Title:
LIDAR03 Other Funding
Publication Information:
Publication Place:
Annapolis, MD
Publisher:
Maryland Department of Natural Resouces
Online Linkage:
Larger Work Citation:
Citation Information:
Originator:
Spatial Systems Associates, Inc.
Publication Date:
20031130
Title:
LIDAR 2003 Bare Earth Mass Points
Geospatial Data Presentation Form:
model
Series Information:
Series name:
Maryland LIDAR
Issue Identification:
2003
Publication Information:
Publication Place:
Annapolis, Maryland
Publisher:
Maryland Department of Natural Resources
Other Citation Details:
1. Airborne 1 (flight firm) 2. Computational Consulting
Services, LLC (processing firm) 3. Spatial Systems
Associates, Inc. (post-processing firm) 4. Dewberry &
Davis (QA/QC firm)
Online Linkage:
Data Quality Information:
Attribute Accuracy:
Attribute Accuracy Report:
None available
Logical Consistency Report:
Computational Consulting Services, the LIDAR processing vendor used
proprietary algorithms to remove features and artifacts in the First
and Last Return data that did not reflect true ground elevation.
Subsequent quality assurance testing by Dewberry determined that the
data met FEMA and MD DNR specifications for both vertical accuracy
and other consistencies with accepted standards. The QA report can be
accessed at .
Completeness Report:
Spatial Systems Associates performed various inspections of the data to
ensure: that each file contained the points located within that tile;
that tiles were completely filled; that the point density per tile
was within expected ranges, and that the tiles were correctly named.
Positional Accuracy:
Horizontal Positional Accuracy:
Horizontal Positional Accuracy Report:
The horizontal coordinate values were designed to meet NSSDA
accuracy for data at 1:2400 scale.
Vertical Positional Accuracy:
Vertical Positional Accuracy Report:
The RMSE value of 14.3 cm at the 95% confidence level was
determined by an independent accuracy assessment conducted by
Dewberry LLC according to the contract specifications. These
specifications followed FEMA Appendix A guidelines regarding
assessing vertical accuracy. For data accurate to within 18.5
cm RMSE, the guidelines recommended a minimum of 20 independent
check points be located in each of 5 different land cover
categories: Grass/Ground, High Grass/Crops, Brush/Low Trees,
Forest, and Urban/Pavement. A total of 125 points were used for
the assessments. These points were surveyed by a licensed land
surveyor and provided a positional location and elevation with
an accuracy that exceeded the predicted accuracy of the LIDAR
data. The entire accuracy reports can be found at
.
Quantitative Vertical Positional Accuracy Assessment:
Vertical Positional Accuracy Value:
14.3
Vertical Positional Accuracy Explanation:
The RMSE value is 14.3 cm. See the Vertical Positional Accuracy
Report section for more information.
Lineage:
Source Information:
Source Citation:
Citation Information:
Originator:
Maryland Department of Natural Resources with Spatial
Systems Associates
Publication Date:
20040320
Title:
Elevation Data - LiDAR Bare Earth Mass Points
Publication Information:
Publication Place:
Annapolis, Maryland
Publisher:
Maryland Department of Natural Resources
Type of Source Media:
disc
Source Time Period of Content:
Time Period Information:
Range of Dates/Times:
Beginning Date:
20030301
Ending Date:
20031130
Source Currentness Reference:
ground condition
Source Citation Abbreviation:
Elevation data
Source Contribution:
Bare-earth LIDAR x-y-z-i data files
Process Step:
Process Description:
LIDAR Data Acquisition. Airborne 1, using an Optec 25 mHz system,
flew the project area with the LIDAR sensor. A portion of the
2003 project area included data acquisition of portions of the
LIDAR 2002 project area that had incomplete coverage. Where
overlaps between the two series of data occurred, the newer
data was used. No attempt at blending the two datasets was made
to maintain the highest data integrity. In an effort to permit
correlation of the point values with tidal gauge stations, the
Airborne 1 was required to fly tidal shoreline areas during the
low tide cycle (slack water - low tide - slack water) as
predicted by local tide stations. The LIDAR sensor collected
raw data that was referenced in UTM. The specifications called
for data collection during leaf-off conditions, which generally
run through early to mid April. However, due to late winter
snow cover, windy flight conditions and other technical
obstacles, data acquisitions continued into early June 2003. In
addition, a small area in the north end of the project area was
acquired in July. Anticipating the trouble with leaf density,
Airborne 1 modified the flight parameters to increase the laser
light penetration to the ground. The flight plan on this
project included the following specifications to meet the
project requirements: *Single pass density - 1.696 square
meters per sample; *Average area sampling density -1.272 square
meters per sample; *Swath width - 996.76 meters; *Flight
altitude -1371 meters (4500 ft); *Flight line spacing - 498.38
meters w/50% overlap; *Scan frequency - 21 Hz; *Firing rate -
25 kHz; *Scan angle - 20 degrees; *Ground speed - 140 knots.
When complete, the raw data was delivered to Spatial Systems.
Process Date:
20040120
Process Contact:
Contact Information:
Contact Person Primary:
Contact Person:
Ken Miller
Contact Organization:
Maryland Department of Natural Resources
Contact Position:
Director, Watershed Information Services
Contact Address:
Address Type:
mailing and physical address
Address:
Tawes State Office Building E-2 580 Taylor Avenue
City:
Annapolis
State or Province:
Maryland
Postal Code:
21401-2397
Country:
USA
Contact Voice Telephone:
410-260-8751
Contact TDD/TTY Telephone:
410-260-8835
Contact Facsimile Telephone:
410-260-8759
Contact Electronic Mail Address:
kenmiller@dnr.state.md.us
Hours of Service:
0800 - 1700 Monday to Friday (EST)
Process Step:
Process Description:
LIDAR Data Processing. Computational Consulting Systems. The First
and Last Return data was delivered to CCS in large blocks of
data. CCS processed the data using both the First and Last
Returns, removed artifacts using automated and manual
techniques, reprojected the data into the client-specified
X,Y,Z text files using the 1200 meter x 1800 meter tiles, NAD
83 meters, NAVD 88 meters. CCS also generated the Intensity
Imagery using the client-specified USGS 3.75' tiling scheme.
The data products were delivered to SSA for quality assurance
testing, formatting and final delivery.
Process Date:
20040120
Process Contact:
Contact Information:
Contact Person Primary:
Contact Person:
Ken Miller
Contact Organization:
Maryland Department of Natural Resources
Contact Position:
Director, Watershed Information Services
Contact Address:
Address Type:
mailing and physical address
Address:
Tawes State Office Building E-2 580 Taylor Avenue
City:
Annapolis
State or Province:
Maryland
Postal Code:
21401-2397
Country:
USA
Contact Voice Telephone:
410-260-8751
Contact TDD/TTY Telephone:
410-260-8835
Contact Facsimile Telephone:
410-260-8759
Contact Electronic Mail Address:
kenmiller@dnr.state.md.us
Hours of Service:
0800 - 1700 Monday to Friday (EST)
Process Step:
Process Description:
LIDAR Data Post Processing. Spatial Systems Associates. SSA
digitized the shoreline from the Intensity Imagery for the
purposes of delineating a shoreline. Any LIDAR points that fell
seaward of this shoreline were assigned the value of zero (0).
In addition to the shoreline, SSA delineated upland ponds using
the same technique and assigned all LIDAR points that fell
within the water area the value of the lowest observed point
close to the shore. The observed elevation values were not lost
- a fourth field in the data file was added for the assigned
value. SSA also performed a variety of QA procedures to
determine if the point density was within expected ranges; that
each tile was completely filled; that all tiles were accounted
for, and that the tiles were named in accordance with client
specifications.
Process Date:
20040120
Process Contact:
Contact Information:
Contact Person Primary:
Contact Person:
Ken Miller
Contact Organization:
Maryland Department of Natural Resources
Contact Position:
Director, Watershed Information Services
Contact Address:
Address Type:
mailing and physical address
Address:
Tawes State Office Building E-2 580 Taylor Avenue
City:
Annapolis
State or Province:
Maryland
Postal Code:
21401-2397
Country:
USA
Contact Voice Telephone:
410-260-8751
Contact TDD/TTY Telephone:
410-260-8835
Contact Facsimile Telephone:
410-260-8759
Contact Electronic Mail Address:
kenmiller@dnr.state.md.us
Hours of Service:
0800 - 1700 Monday to Friday (EST)
Process Step:
Process Description:
LIDAR Data Check Point Surveys. NXL Construction Services. NXL was
contracted to acquire the check-points in the 5 different land
cover classes. SSA provided NXL with maps of each area where a
check-point was to be located. The points were scattered
throughout the project area. NXL was permitted the latitude to
select the exact location based on field conditions, provided
the points were generally within a 1 mile radius of the chosen
location and that the land cover class was the same as the one
specified. The land cover classes were: Grass/Ground, High
Grass/Crops, Brush/Low Trees, Forest, and Urban/Pavement.
Process Date:
20040120
Process Contact:
Contact Information:
Contact Person Primary:
Contact Person:
Ken Miller
Contact Organization:
Maryland Department of Natural Resources
Contact Position:
Director, Watershed Information Services
Contact Address:
Address Type:
mailing and physical address
Address:
Tawes State Office Building E-2 580 Taylor Avenue
City:
Annapolis
State or Province:
Maryland
Postal Code:
21401-2397
Country:
USA
Contact Voice Telephone:
410-260-8751
Contact TDD/TTY Telephone:
410-260-8835
Contact Facsimile Telephone:
410-260-8759
Contact Electronic Mail Address:
kenmiller@dnr.state.md.us
Hours of Service:
0800 - 1700 Monday to Friday (EST)
Process Step:
Process Description:
LIDAR Data Quailty Assurance. Dewberry LLC was provided with the
check-point and LIDAR Bare Earth Mass Points data to perform
their independent quality assurance work. They performed
detailed analyses to determine if the vertical accuracy with
within specifications and examined the data for flight, data
collection and processing inconsistencies. Neither the flight
vendor (Airborne 1) nor the processing vendor (CCS) was given
access to the check-point data. The entire accuracy report can
be found at .
Process Date:
20040120
Process Contact:
Contact Information:
Contact Person Primary:
Contact Person:
Ken Miller
Contact Organization:
Maryland Department of Natural Resources
Contact Position:
Director, Watershed Information Services
Contact Address:
Address Type:
mailing and physical address
Address:
Tawes State Office Building E-2 580 Taylor Avenue
City:
Annapolis
State or Province:
Maryland
Postal Code:
21401-2397
Country:
USA
Contact Voice Telephone:
410-260-8751
Contact TDD/TTY Telephone:
410-260-8835
Contact Facsimile Telephone:
410-260-8759
Contact Electronic Mail Address:
kenmiller@dnr.state.md.us
Hours of Service:
0800 - 1700 Monday to Friday (EST)
Process Step:
Process Description:
The NOAA Coastal Services Center (CSC) received ASCII files
containing the bared-earth elevation
and intensity data from Maryland Department of Natural Resources.
CSC performed the
following processing on the data to make it available within the
Lidar Data Retrieval
Tool (LDART):
1. The data were projected from Maryland State Plane coordinates
to geographic
decimal degrees using the General Cartographic Transformation
Package.
2. The lat, lon, MODZVAL and intensity values where extracted from
the ascii files
and converted to the LDART binary format.
3. The data were converted to xyz text files
Process Date:
20040528
Process Contact:
Contact Information:
Contact Organization Primary:
Contact Organization:
Coastal Remote Sensing Program
Contact Position:
TCM Project Scientist
Contact Address:
Address Type:
mailing and physical address
Address:
2234 South Hobson Avenue
City:
Charleston
State or Province:
South Carolina
Postal Code:
29405
Country:
United States
Contact Voice Telephone:
(843) 740-1200
Contact Electronic Mail Address:
csc@csc.noaa.gov
Process Step:
Process Description:
The NOAA National Geophysical Data Center (NGDC) received Lidar
data files on external harddrive. The disk contains LiDAR data
from the NOAA Coastal Services Center. This data is currently
being served via LDART at http://www.csc.noaa.gov/ldart . This
data can be used to re-populate the system. The data are
provided on this disk in two forms, ascii x,y,z data and also
in LAS format. LAS format is an industry standard for serving
LiDAR data. The data are exclusively in geographic coordinates,
however, the datums used vary. Most is NAD 83, however some is
in ITRF. Vertical systems include both ellipsoid (ITRF and NAD
83) and NAVD 88. For NAVD 88 values, Geiod 03 is primarily
used; however, data received in NAVD 88 prior to 2003 was
processed using Geoid 99.
Process Date:
20060103
Process Contact:
Contact Information:
Contact Organization Primary:
Contact Organization:
DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center,
NESDIS, NOAA, U.S. Department of Commerce
Contact Person:
Kelly Stroker
Contact Address:
Address Type:
Mailing and Physical Address
Address:
NOAA/NESDIS/NGDC E/GC1 325 Broadway
City:
Boulder
State or Province:
CO
Postal Code:
80305-3328
Country:
USA
Contact Voice Telephone:
(303) 497-4603
Contact TDD/TTY Telephone:
(303) 497-6958
Contact Facsimile Telephone:
(303) 497-6513
Contact Electronic Mail Address:
kelly.stroker@noaa.gov
Hours of Service:
7:30-5:00 Mountain
Contact Instructions:
Contact Data Center
Spatial Data Organization Information:
Direct Spatial Reference Method:
Point
Point and Vector Object Information:
SDTS Terms Description:
SDTS Point and Vector Object Type:
Point
Spatial Reference Information:
Horizontal Coordinate System Definition:
Geographic:
Latitude Resolution:
9.18324858207982e-10
Longitude Resolution:
7.22673785799571e-10
Geographic Coordinate Units:
Decimal degrees
Geodetic Model:
Horizontal Datum Name:
North American Datum of 1983
Ellipsoid Name:
Geodetic Reference System 80
Semi-major Axis:
6378137
Denominator of Flattening Ratio:
298.257
Vertical Coordinate System Definition:
Altitude System Definition:
Altitude Datum Name:
North American Vertical Datum of 1988
Altitude Resolution:
0.01
Altitude Distance Units:
meters
Altitude Encoding Method:
Explicit elevation coordinate included with horizontal coordinates
Distribution Information:
Distributor:
Contact Information:
Contact Organization Primary:
Contact Organization:
NOAA Coastal Services Center
Contact Position:
Coastal Remote Sensing Program Manager
Contact Address:
Address Type:
mailing and physical address
Address:
2234 South Hobson Avenue
City:
Charleston
State or Province:
SC
Postal Code:
29405-2413
Contact Voice Telephone:
none
Contact Electronic Mail Address:
csc@csc.noaa.gov
Distribution Liability:
Any conclusions drawn from analysis of this information
are not the responsibility of NOAA or the Coastal Services
Center.
Custom Order Process:
This data can be obtained on-line at the following URL:
http://www.csc.noaa.gov/ldart.
Distribution Information:
Distributor:
Contact Information:
Contact Organization Primary:
Contact Organization:
DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center,
NESDIS, NOAA, U.S. Department of Commerce
Contact Person:
Kelly Stroker
Contact Address:
Address Type:
Mailing and Physical Address
Address:
NOAA/NESDIS/NGDC E/GC1 325 Broadway
City:
Boulder
State or Province:
CO
Postal Code:
80305-3328
Country:
USA
Contact Voice Telephone:
(303) 497-4603
Contact TDD/TTY Telephone:
(303) 497-6958
Contact Facsimile Telephone:
(303) 497-6513
Contact Electronic Mail Address:
kelly.stroker@noaa.gov
Hours of Service:
7:30-5:00 Mountain
Contact Instructions:
Contact Data Center
Distribution Liability:
Disclaimer While every effort has been made to ensure that these data
are accurate and reliable within the limits of the current state of
the art, NOAA cannot assume liability for any damages caused by any
errors or omissions in the data, nor as a result of the failure of
the data to function on a particular system. NOAA makes no warranty,
expressed or implied, nor does the fact of distribution constitute
such a warranty.
Custom Order Process:
The National Geophysical Data Center serves as the archive for this
LIDAR data. NGDC should only be contacted for this data if it cannot
be obtained from NOAA Coastal Services Center.
Metadata Reference Information:
Metadata Date:
20040528
Metadata Review Date:
20040528
Metadata Contact:
Contact Information:
Contact Organization Primary:
Contact Organization:
NOAA Coastal Services Center
Contact Person:
Keil Schmid
Contact Position:
Metadata Specialist
Contact Address:
Address Type:
mailing and physical address
Address:
2234 South Hobson Avenue
City:
Charleston
State or Province:
SC
Postal Code:
29405-2413
Contact Voice Telephone:
none
Contact Electronic Mail Address:
metadata@csc.noaa.gov
Metadata Standard Name:
FGDC Content Standards for Digital
Geospatial Metadata
Metadata Standard Version:
FGDC-STD-001-1998
