gov.noaa.nmfs.inport:49695
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)
2008 St. Johns County, FL Countywide Lidar
fl2008_stjohns_m1119_metadata
2009-01-06
publication
NOAA/NMFS/EDM
49695
https://www.fisheries.noaa.gov/inport/item/49695
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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
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Airborne terrestrial LiDAR was collected for St. Johns County, FL. System Parameters/Flight Plan. The LiDAR system acquisition
parameters were developed based on a maximum average ground sample distance of 2.1 feet. A Leica ALS50 LiDAR sensor was used for acquisition.
Acquisition specifications for the sensor follows: Field of View (full angle) - 24 degrees, Nominal flight altitude (AGL) - 3000 feet,
Airspeed - 130 mph (113 knots), Laser pulse rate - 100,000 Hz, Nominal swath width (on ground) - 1275 feet, Maximum cross track point
spacing - 2.07 feet, Maximum along track point spacing - 4.30 feet, Average point spacing - 1.67 feet, Flight line spacing - 970.47 feet,
Side overlap - 23.91 percent. LiDAR System Calibration. Prior to the LiDAR acquisition, the system underwent a calibration to verify the
operational accuracy and misalignment angles. Boresight calibrations were performed for the LiDAR system at the beginning and end of each
flight mission. LiDAR Data Acquisition. LiDAR data acquisition only occurred when the sky was sufficiently clear of clouds, smoke, and
atmospheric haze. The LiDAR data was processed immediately after the acquisition to verify the coverage had no voids. GPS/Inertial Measurement
Unit (IMU) Post Processing. The GPS and IMU data was post processed using differential and kalman filter algorithms to derive a best estimate
of trajectory. The quality of the solution was verified to be consistent with the accuracy requirements of the project. LiDAR Processing and
Classification. The LiDAR data was post processed and verified to be consistent with the project requirements in terms of post spacing and
absence of artifacts. The point cloud underwent classification to determine bare-earth points (class 2), noise points (class 7), water
returns (class 9), and unclassified data (class 1). Class 12 contains LiDAR points removed from the overlap region between adjacent flight
lines.
Original contact information:
Contact Org: St. Johns County GIS Division
Phone: 904-209-0778
Email: gis@sjcfl.us
The DTM was developed to support the development and maintenance of the St. Johns County Countywide Digital Contour Mapping Project.
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
asNeeded
Lidar - partner (no harvest)
project
InPort
otherRestrictions
Cite As: OCM Partners, [Date of Access]: 2008 St. Johns County, FL Countywide Lidar [Data Date Range], https://www.fisheries.noaa.gov/inport/item/49695.
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.
Information from the St. Johns County Geographic Information System is provided for general reference purposes only and is not to be construed
as a survey or legal document. Errors from non-coincidence of features from different sources may be present. The St. Johns County Geographic
Information System makes every reasonable effort to ensure that the information provided herein is current and accurate. However, St. Johns
County provides no warranties, expressed or implied, concerning the accuracy, completeness, reliability, or suitability of this data for
any particular use or purpose. St. Johns County assumes no liability whatsoever associated with the use or misuse of such data.
otherRestrictions
Distribution Liability: Any conclusions drawn from the analysis of this information are not the responsibility of the Office for Coastal Management
or its partners.
unclassified
NOAA Data Management Plan (DMP)
NOAA/NMFS/EDM
49695
https://www.fisheries.noaa.gov/inportserve/waf/noaa/nos/ocmp/dmp/pdf/49695.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
Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 2; ESRI ArcCatalog 9.2.0.1324
-81.669741
-81.212177
29.621834
30.253509
| Currentness: Ground Condition
2008-02-14
| Currentness: Ground Condition
2008-02-15
| Currentness: Ground Condition
2008-02-16
| Currentness: Ground Condition
2008-02-17
| Currentness: Ground Condition
2008-02-19
| Currentness: Ground Condition
2008-02-20
| Currentness: Ground Condition
2008-02-21
| Currentness: Ground Condition
2008-02-25
Project Title- Countywide Digital Contour Mapping; Vendor Name- Woolpert, Inc.
The Final QA/QC Quantitative Assessment Report for this data set may be viewed at:
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/1119/supplemental/2008_StJohns_MTS_Final_Report_Lidar_Ortho.pdf
The Final Ground Control Survey Report (more detail given to field activities, process, etc.) may be viewed at:
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/1119/supplemental/2008_StJohns_MTS_Final_Report_Ground_Control.pdf
An additional Aerial Triangulation Report may be accessed at:
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/1119/supplemental/2008_StJohns_MTS_Final_Report_AerialTriangulation.pdf
A footprint of this data set may be viewed in Google Earth at:
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/1119/supplemental/2008_St_Johns_County_FL_Countywide_Lidar.kmz
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=1119
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/geoid18/1119/index.html
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Bulk Download
Simple download of data files.
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dataset
Horizontal Positional Accuracy
Horizontal accuracy is +/- 3.8-foot at the 95% confidence level using RMSE(r) x 1.7308 as defined by the FGDC Geospatial Positional
Accuracy Standards, Part 3: NSSDA.
; Quantitative Value: 3.8 meters, Test that produced the value:
LiDAR system calibration is available in the MTS Report of Specific Purpose Survey.
Vertical Positional Accuracy
Vertical accuracy is +/- 0.4-foot RMSE for unobscured ground points. The accuracy assessment was performed using a standard method to
compute the root mean square error (RMSE) based on a comparison of ground control points and filtered LiDAR data points. Filtered LiDAR
data has had vegetation and cultural features removed and by analysis represents bare earth elevations. The RMSE figure was used to compute
the vertical National Standard for Spatial Data Accuracy (NSSDA). The vertical accuracy of the 2-foot contours, with supplemental 1-foot
contours, is +/- 0.75 foot RMSE in unobscured areas.
; Quantitative Value: 0.4 meters, Test that produced the value:
The accuracy assessment was performed using a standard method to compute the root mean square error (RMSE) based on a comparison of ground
control points and filtered LiDAR data points. Results for this project are available in the MTS Report of Specific Purpose Survey.
Completeness Report
This feature class represents the complete set of data for 797 5,000' x 5,000' tiles within St. Johns County.
Conceptual Consistency
The LiDAR DTM was developed in accordance with St. Johns specifications.
Ground (class 2) LAS points were extracted in ArcMap, using a Woolpert Team-developed VB Script, and loaded into the MASSPOINTS feature
class for each area's Geodatabase as multipoint geometry.
2008-01-06T00:00:00
The NOAA Office for Coastal Management received the data in LAS format. The files contained Lidar elevation and intensity measurements. The data
were projected in State Plane coordinates (NAD83; Florida East) and referenced to the North American Vertical Datum of 1988 (NAVD88) using the Geoid03 model.
The following processes were performed to make the data available within the Digital Coast:
1. The data were converted from state plane (NAD83; Florida East) to geographic coordinates (NAD83).
2. The data were converted from NAVD88 (orthometric) heights to GRS80 (ellipsoidal) heights using the Geoid03 model.
3. The LAS data were sorted by latitude and the headers were updated.
2011-11-15T00:00:00
Source Contribution: Onboard Laser | Source Geospatial Form: model | Type of Source Media: disc
1200
Countywide Digital Contour Mapping Project
2008-06-30
publication
2008-02-14
2008-02-25