gov.noaa.nmfs.inport:49783
eng
UTF8
dataset
OCM Partners
resourceProvider
NOAA Office for Coastal Management
(843) 740-1202
2234 South Hobson Ave
Charleston
SC
29405-2413
coastal.info@noaa.gov
https://coast.noaa.gov
WWW:LINK-1.0-http--link
Website
NOAA Office for Coastal Management Home Page
information
pointOfContact
2020-03-24T00:00:00
ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data
ISO 19115-2:2009(E)
NAD83
2008-11-12
publication
European Petroleum Survey Group
http://www.epsg-registry.org/export.htm?gml=urn:ogc:def:crs:EPSG::4269
urn:ogc:def:crs:EPSG:4269
6.18.3
North American Vertical Datum of 1988 (NAVD88) (GEOID12A) meters
North American Vertical Datum of 1988 (NAVD88) (GEOID12A) meters
http://www.epsg-registry.org/export.htm?gml=urn:ogc:def:crs:EPSG::5703
North American Vertical Datum of 1988 (NAVD88) (GEOID12A) meters
Link to Geographic Markup Language (GML) description of reference system.
information
resourceProvider
European Petroleum Survey Group
http://www.epsg-registry.org/
European Petroleum Survey Group Geodetic Parameter Registry
Registry that accesses the EPSG Geodetic Parameter Dataset, which is a structured dataset of Coordinate Reference Systems and Coordinate Transformations.
search
publisher
vertical
OGP
2006-11-28
false
urn:ogc:def:cs:EPSG::6499
Vertical CS. Axis: height (H). Orientation: up. UoM: meter.
Used in vertical coordinate reference systems.
urn:ogc:def:axis:EPSG::114
H
up
urn:ogc:def:crs:EPSG::5703
2005 Maryland Department of Natural Resources LiDAR: Cecil County
md2005_m32_metadata
2005-01-20
publication
NOAA/NMFS/EDM
49783
1. Airborne1, Inc. (flight firm)
2. Computational Consulting Services, LLC (processing firm)
3. Spatial Systems Associates, Inc. (post-processing firm)
4. Dewberry and Davis (QA/QC firm)
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. This data set contains
only the bare earth mass points. Bare earth points represent ground features. Features that are above ground, such as buildings,
bridges, tree tops, etc, have been eliminated. 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.
Original contact information:
Contact Name: Ken Miller
Contact Org: Maryland Department of Natural Resources
Title: Chief. Watershed Information Services Division
Phone: 410-260-8751
Email: kenmiller@dnr.state.md.us
This data set is an LAZ (compressed LAS) format file containing LIDAR point cloud data.
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.
Spatial Systems Associates, Inc. was the prime contractor for this project. It partnered with Airborne1, Inc.,
Computational Consulting Services, Inc., NXL Construction Services, Inc and Dewberry LLC.
The custom download may be cited as National Oceanic and Atmospheric Administration (NOAA) Digital Coast Data Access Viewer. Charleston, SC: NOAA Office for Coastal Management. Accessed Jun 26, 2020 at https://coast.noaa.gov/dataviewer.
completed
NOAA Office for Coastal Management
(843) 740-1202
2234 South Hobson Ave
Charleston
SC
29405-2413
coastal.info@noaa.gov
https://coast.noaa.gov
WWW:LINK-1.0-http--link
Website
NOAA Office for Coastal Management Home Page
information
pointOfContact
NOAA Office for Coastal Management
(843) 740-1202
2234 South Hobson Ave
Charleston
SC
29405-2413
coastal.info@noaa.gov
https://coast.noaa.gov
WWW:LINK-1.0-http--link
Website
NOAA Office for Coastal Management Home Page
information
custodian
notPlanned
Bald earth
Bare earth
Bathymetry/Topography
DEM
Digital Elevation Model
DNR
Elevation and derived products
Elevation model
First return
Gridded DEM
Last return
LIDAR
Surface model
Terrain model
theme
DNR General
Cecil County
Chesapeake Bay
Maryland
US
place
Lidar - partner (no harvest)
project
InPort
NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose.
otherRestrictions
otherRestrictions
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. The 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. | Distribution Liability: Any conclusions drawn from the analysis of this information are not the responsibility of NOAA, the OCM or
its partners.
unclassified
NOAA Data Management Plan (DMP)
NOAA/NMFS/EDM
49783
https://inport.nmfs.noaa.gov/inport-metadata/NOAA/NOS/OCMP/dmp/pdf/49783.pdf
WWW:LINK-1.0-http--link
NOAA Data Management Plan (DMP)
NOAA Data Management Plan for this record on InPort.
information
crossReference
vector
eng; US
elevation
A variety of specialized hardware and software platforms were used to collect, process and quality assess
these data. Typically, Intel machines running Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4.
-76.24904
-75.75024
39.357195
39.728895
| Currentness: Ground Condition
2005-04-15
2005-04-23
These data are part of a suite of spatial data products generated using the LIDAR technology. First and
Last returns are generated. From these data, Bare-Earth Mass Points that represent the earths surface are produced. A gridded
Digital Elevation Model (DEM) is produced from the Bare Earth Mass Points. Imagery is also created that represents the intensity
of the LIDAR return; it is a 1-meter resolution product that resembles a panchromatic Digital Orthophoto Quad (DOQ).
The Cecil County, Maryland QA Report may be viewed at: https://coast.noaa.gov/htdata/lidar1_z/geoid12a/data/32/supplemental
NOAA Office for Coastal Management
(843) 740-1202
2234 South Hobson Ave
Charleston
SC
29405-2413
coastal.info@noaa.gov
https://coast.noaa.gov
WWW:LINK-1.0-http--link
Website
NOAA Office for Coastal Management Home Page
information
distributor
https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=32
WWW:LINK-1.0-http--link
Customized Download
Create custom data files by choosing data area, product type, map projection, file format, datum, etc.
download
https://coast.noaa.gov/htdata/lidar1_z/geoid12a/data/32
WWW:LINK-1.0-http--link
Bulk Download
Simple download of data files.
download
dataset
Accuracy
There are four (4) attributes in the Bare Earth Mass Points files, representing the horizontal coordinates
(easting and northing) and vertical position observed and vertical assigned (see process description). Random inspections were made
to assure that each line in the file contained 4 values.
Horizontal Positional Accuracy
The horizontal coordinate values were designed to meet NSSDA accuracy for data at 1:2400 scale.
Vertical Positional Accuracy
The RMSE value of 9.3 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 100 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 http://dnrweb.dnr.state.md.us/gis/data/lidar.
; Quantitative Value: 9.3 meters, Test that produced the value:
The RMSE value is 9.3 cm. See the Vertical Positional Accuracy Report section for more
information.
Completeness Measure
Cloud Cover: 0
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.
Conceptual Consistency
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 http://dnrweb.dnr.state.md.us/gis/data/lidar.
LIDAR Data Acquisition. Airborne 1, Inc. flew the project area with the LIDAR sensor. In an effort to permit
correlation of the point values with tidal gauge stations, Airborne 1, Inc. 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 flight plan on this project included the following specifications to meet the project
requirements: *Single pass density - 1.544 square meters per sample; *Average area sampling density -1.52 square meters per sample;
*Swath width - 891.32 meters; *Flight altitude -1371 meters (4500 ft); *Flight line spacing - 445.66 meters w/50% overlap;
*Scan frequency - 22 Hz; *Firing rate - 25 kHz; *Scan angle - 18 degrees; *Ground speed - 130 knots. When complete, the raw data
was delivered to Spatial Systems.
2005-04-24T00:00:00
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, and 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.
2005-08-30T00:00:00
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.
2005-09-30T00:00:00
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.
2005-06-30T00:00:00
LIDAR Data Quality 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
was 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 http://dnrweb.dnr.state.md.us/gis/data/lidar.
2005-09-30T00:00:00
The NOAA Office for Coastal Management (OCM) received LAS files containing the point cloud elevation data from
Earth Data, Inc. OCM performed the following processing on the data to make it available within the Lidar Data Retrieval Tool
(LDART):
1. Variable length header records were added to the LAS files to identify projection, datum and sort order.
2. The LFIT files were sorted by latitude.
3. Lfit files were exported to xyz ASCII text.
2006-11-01T00:00:00
The vertical values in this data set have been converted to reference North American Vertical Datum of 1988 (NAVD88) (GEOID12A) meters, using the GEOID12A grids provided by the National Geodetic Survey.
Any datum and projection transformations were then done with the Office for Coastal Management 'datum_shift' program. Compression to an LAZ file was done with the LAStools 'laszip' program and can be unzipped with the same free program (laszip.org)
Processing notes:
2020-06-26T03:56:30
NOAA Office for Coastal Management
coastal.info@noaa.gov
processor