gov.noaa.nmfs.inport:49685
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
NOAA Office for Coastal Management Website
NOAA Office for Coastal Management Home Page
information
pointOfContact
2024-02-29T00:00:00
ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data
ISO 19115-2:2009(E)
2005 St. Johns River Water Management District (SJRWMD) Lidar: Western Seminole County, Florida
fl2005_seminole_m101_metadata
2005-08
publication
NOAA/NMFS/EDM
49685
https://www.fisheries.noaa.gov/inport/item/49685
WWW:LINK-1.0-http--link
Full Metadata Record
View the complete metadata record on InPort for more information about this dataset.
information
https://coast.noaa.gov
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Citation URL
Online Resource
download
https://coast.noaa.gov/dataviewer
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Citation URL
Online Resource
download
This data set consists of a bare earth data set of 498 files covering a geographic area of 175 square miles in
western Seminole County, Florida and includes small portions of adjacent Orange and Lake Counties. The lidar data was
collected June 5-7, 2005. This data set seems to contain only model keypoints (points that are a thinned data set that is
intended to remove extraneous data such as trees and points that are deemed redundant to the final bare earth product)
that are classified as ground points. As a result, there are a lower number of points than in a full mass point lidar data
set; and it is recommended that the data be downloaded as points and used with a TIN (Triangulated Irregular Network)
or similar algorithm to produce a bare earth surface.
Original contact information:
Contact Name: Paul Finer
Contact Org: St. Johns River Water Management District (SJRWMD)
Phone: 386-329-4542
Email: gis_support@sjrwmd.com
This data set depicts information about geographic features within the project area and is to be used for purposes
defined by the SJRWMD.
St. Johns River Water Management District (SJRWMD)
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
NOAA Office for Coastal Management 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
NOAA Office for Coastal Management Website
NOAA Office for Coastal Management Home Page
information
custodian
unknown
ASCII
Bare earth
Intensity image
theme
Lidar - partner (no harvest)
project
InPort
otherRestrictions
Cite As: OCM Partners, [Date of Access]: 2005 St. Johns River Water Management District (SJRWMD) Lidar: Western Seminole County, Florida [Data Date Range], https://www.fisheries.noaa.gov/inport/item/49685.
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
Access Constraints: None
otherRestrictions
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.
otherRestrictions
Distribution Liability: Any conclusions drawn for the analysis of this information are not the responsibility of the St. Johns
River Water Management District (SJRWMD), the Office for Coastal Management, or its partners.
unclassified
NOAA Data Management Plan (DMP)
NOAA/NMFS/EDM
49685
https://www.fisheries.noaa.gov/inportserve/waf/noaa/nos/ocmp/dmp/pdf/49685.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
-81.486743
-81.240467
28.639242
28.875263
| Currentness: Ground Condition
2005-06-05
2005-06-07
The Consolidated, Fundamental and Supplemental Vertical Accuracy Reports and the Photogrammetric
Survey and Map Report may be viewed at: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/101/supplemental/index.html
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
NOAA Office for Coastal Management Website
NOAA Office for Coastal Management Home Page
information
distributor
https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=101
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://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/101/index.html
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Bulk Download
Simple download of data files.
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dataset
Horizontal Positional Accuracy
The LiDAR data was compiled to meet a 7.6-foot horizontal accuracy at 95-percent confidence level. Due to the coarse nature
of the LiDAR data no comparisons could be made between the intensity returns and the horizontal positions of field surveyed
points. Project planning for high resolution LiDAR data and proven system performance were used to determine the expected
horizontal accuracy.
Final map data are referenced to the Florida High Accuracy Reference Network (HARN) adjustment for the North American Datum
of 1983. Projection was Universal Transverse Mercator (UTM), Zone 17, units were meters.
Vertical Positional Accuracy
The LiDAR data was tested for a fundamental vertical accuracy and a supplemental vertical accuracy. The fundamental accuracy was
tested for points that fall in open areas, not obscured by vegetation, having a normalized distribution. The supplemental
accuracy was tested for points that fall in areas of vegetation, where data does not follow a normalized distribution.
The fundamental vertical accuracy was tested 0.56-foot vertical accuracy at 95 percent confidence level using RMSE procedures
with no outliers. The vertical root mean square error (RMSEz) was tested at 0.29-foot. The fundamental vertical accuracy meets
the National Standards for Spatial Data Accuracy (NSSDA) for one-foot contours. These results were determined by comparing
thirty-nine (39) field surveyed points obtained on hard surface and open areas with the Bald Earth Last Return LiDAR data.
Refer to file 05680_fundamental_vert_acc.xls to view the results including summary statistics, normalized distribution, and a
histogram.
The supplemental vertical accuracy was tested 1.29-feet vertical accuracy at 95 percent confidence level, determined by
the 95th percentile method. Point M3 having a -1.94 feet difference was determined to be an outlier. These results were
determined by comparing forty (40) field-surveyed points obtained in brush and forested areas with the Bald Earth Last
Return LiDAR data. Refer to file 05680_supplemental_vert_acc.xls to view the results including summary statistics,
normalized distribution, and a histogram. Another analysis of the data will be made after the manual edit of the LiDAR data
that may change these results.
Ground control surveys were conducted under the supervision of a licensed Florida Surveyor and Mapper in accordance with
Florida State Statutes. Horizontal values were referenced to the Florida High Accuracy Reference Network (HARN) adjustment
for the North American Datum of 1983. Projection was Universal Transverse Mercator (UTM), Zone 17, units were meters. Vertical
values were referenced to North American Vertical Datum of 1988 (NAVD88) units were feet. GPS and conventional
survey methodology was used to generate the values of the surveyed points located throughout the project area.
Completeness Report
Not provided
Conceptual Consistency
Not provided
LiDAR Data Acquisition -- The Lidar data was collected utilizing an Optech ALTM (Airborne Laser Terrain Mapper) 2025 in
a Cessna 208 Grand Caravan aircraft on June 5, 2005 between 0930 and 1150 hours at an altitude of 3000' AGL. Data was also
collected starting June 6, 2005 at 1830 hours and ending on June 7 at 0900 hours. The configuration used a scan half-angle
of +/-17 degrees, a laser pulse repetition frequency of 25 kilohertz, and a flying speed of approximately 80 knots.
Airborne GPS using a Novatel dual frequency GPS receiver was accomplished during the flight session to provide positional
information for the Lidar platform. Simultaneous acquisition of ground base station data was performed using a Novatel
and Leica SR9500 dual frequency receivers for the June 5, 2005 session. Two Leica SR9500 dual frequency GPS receivers were
used for the second session on June 6-7, 2005. Each station remained in operation for the duration of the project flight.
The ground base stations were set up over National Geodetic Survey (NGS) monuments AK0205 (Designation Number I4 71 A14)
and AK7045 (Designation Number GIS 0472 CAS 1). Positional information on these monuments was obtained from Data Sheets
retrieved from the NGS website (http://www.ngs.noaa.gov).
The GPS data from the ground base stations and the airborne platform were processed together using Applanix POSPac 4.2
software module POSGPS. All adjustments were referenced to WGS84.
The Inertial Measurement Unit (IMU) solution was accomplished to provide information regarding the attitude of the Lidar
platform using the Applanix POSPac 4.2 software module POSProc. This solution was integrated with the Airborne GPS and
adjusted using a Kalman filter in a forward/reverse solution to provide a Smoothed Best Estimate of Trajectory (SBET).
Laser ranging from the airborne platform was accomplished using Realm 3.2 processing software to provide XYZ ground positions
for each point.
The final horizontal values were output in Universal Transverse Mercator (UTM), Zone 17, units are meters. The horizontal
datum conforms to the current Florida High Accuracy Reference Network (HARN) adjustment for the North American Datum of 1983.
The Vertical Datum is the North American Vertical Datum of 1988 (NAVD88), units are feet.
2005-06-07T00:00:00
Classification of the laser data to extract above ground features such as buildings and vegetation
leaving only bare earth ground points was performed using Terrasolid Ltd. Terrascan software (Version 003.003). The data
was separated into five (5) separate sets 502 files representing Bald Earth First Pulse, Bald Earth Last Pulse, Extracted
Features First Pulse, Extracted Features Last Pulse, and LAS format. The Bald Earth Last Pulse best represents the natural
ground and is the file upon which all accuracy statements are based. The Extracted Features First Pulse best represents the
canopy data that includes all features determined to be above the natural ground.
2005-07-01T00:00:00
The NOAA Office for Coastal Management (OCM) received the bare earth files in ASCII format. The data were
Universal Transverse Mercator (UTM), Zone 17, units in meters, NAVD88 vertical datum and the vertical units of measure
were feet. OCM performed the following processing to the ASCII data to make it available within Digital Coast:
1. The data were converted from UTM coordinates to geographic coordinates.
2. The data were converted from NAVD88 (orthometric) heights to GRS80 (ellipsoid) heights using Geoid 03.
3. The LAS data were sorted by latitude and the headers were updated.
2008-11-14T00:00:00