2008 St. Johns County, FL Countywide Lidar
OCM Partners
Data Set
(DS)
| ID: 49695
| Published / External
Created: 2017-11-15
|
Last Modified: 2022-08-09
Project (PRJ) | ID: 49401
ID: 49695
Data Set (DS)
* Discovery• First Pass
» Metadata Rubric
Item Identification
* » Title | 2008 St. Johns County, FL Countywide Lidar |
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Short Name | fl2008_stjohns_m1119_metadata |
* Status | Completed |
Creation Date | |
Revision Date | |
• Publication Date | 2009-01-06 |
* » Abstract |
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 |
* Purpose |
The DTM was developed to support the development and maintenance of the St. Johns County Countywide Digital Contour Mapping Project. |
Notes |
10339 |
Other Citation Details | |
• Supplemental Information |
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 |
DOI (Digital Object Identifier) | |
DOI Registration Authority | |
DOI Issue Date |
Keywords
Theme Keywords
Thesaurus | Keyword |
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ISO 19115 Topic Category | elevation |
Temporal Keywords
Thesaurus | Keyword |
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* Spatial Keywords
Thesaurus | Keyword |
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Stratum Keywords
Thesaurus | Keyword |
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Instrument Keywords
Thesaurus | Keyword |
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Platform Keywords
Thesaurus | Keyword |
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Physical Location
• » Organization | Office for Coastal Management |
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• » City | Charleston |
• » State/Province | SC |
• Country | |
• » Location Description |
Data Set Information
* Data Set Scope Code | Data Set |
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• Data Set Type | |
• Maintenance Frequency | As Needed |
Maintenance Note | |
» Data Presentation Form | LAS |
• Entity Attribute Overview | |
Entity Attribute Detail Citation | |
Entity Attribute Detail URL | |
Distribution Liability |
Any conclusions drawn from the analysis of this information are not the responsibility of the Office for Coastal Management or its partners. |
Data Set Credit |
Support Roles
* » Support Role | Data Steward |
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* » Date Effective From | 2009-01-06 |
Date Effective To | |
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 |
Fax | |
Mobile | |
URL | https://coast.noaa.gov |
Business Hours | |
Contact Instructions |
* » Support Role | Distributor |
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* » Date Effective From | 2009-01-06 |
Date Effective To | |
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 |
Fax | |
Mobile | |
URL | https://coast.noaa.gov |
Business Hours | |
Contact Instructions |
* » Support Role | Metadata Contact |
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* » Date Effective From | 2009-01-06 |
Date Effective To | |
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 |
Fax | |
Mobile | |
URL | https://coast.noaa.gov |
Business Hours | |
Contact Instructions |
* » Support Role | Point of Contact |
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* » Date Effective From | 2009-01-06 |
Date Effective To | |
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 |
Fax | |
Mobile | |
URL | https://coast.noaa.gov |
Business Hours | |
Contact Instructions |
* » Support Role | |
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* » Date Effective From | |
Date Effective To | |
* » Contact | |
* Contact Instructions |
* » Support Role | |
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* » Date Effective From | |
Date Effective To | |
* » Contact | |
* Contact Instructions |
* » Support Role | |
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* » Date Effective From | |
Date Effective To | |
* » Contact | |
* Contact Instructions |
Extents
Currentness Reference | Ground Condition |
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Extent Group 1
Extent Description |
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Extent Group 1 / Geographic Area 1
* » W° Bound | -81.669741 |
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* » E° Bound | -81.212177 |
* » N° Bound | 30.253509 |
* » S° Bound | 29.621834 |
* » Description |
Extent Group 1 / Vertical Extent
EPSG Code | |
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Vertical Minimum | |
Vertical Maximum |
Extent Group 1 / Time Frame 1
* » Time Frame Type | Discrete |
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* » Start | 2008-02-14 |
End | |
Alternate Start As Of Info | |
Alternate End As Of Info | |
Description |
Extent Group 1 / Time Frame 2
* » Time Frame Type | Discrete |
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* » Start | 2008-02-15 |
End | |
Alternate Start As Of Info | |
Alternate End As Of Info | |
Description |
Extent Group 1 / Time Frame 3
* » Time Frame Type | Discrete |
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* » Start | 2008-02-16 |
End | |
Alternate Start As Of Info | |
Alternate End As Of Info | |
Description |
Extent Group 1 / Time Frame 4
* » Time Frame Type | Discrete |
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* » Start | 2008-02-17 |
End | |
Alternate Start As Of Info | |
Alternate End As Of Info | |
Description |
Extent Group 1 / Time Frame 5
* » Time Frame Type | Discrete |
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* » Start | 2008-02-19 |
End | |
Alternate Start As Of Info | |
Alternate End As Of Info | |
Description |
Extent Group 1 / Time Frame 6
* » Time Frame Type | Discrete |
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* » Start | 2008-02-20 |
End | |
Alternate Start As Of Info | |
Alternate End As Of Info | |
Description |
Extent Group 1 / Time Frame 7
* » Time Frame Type | Discrete |
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* » Start | 2008-02-21 |
End | |
Alternate Start As Of Info | |
Alternate End As Of Info | |
Description |
Extent Group 1 / Time Frame 8
* » Time Frame Type | Discrete |
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* » Start | 2008-02-25 |
End | |
Alternate Start As Of Info | |
Alternate End As Of Info | |
Description |
Spatial Information
Spatial Resolution
Angular Distance | |
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Angular Distance Units | |
Horizontal Distance | |
Horizontal Distance Units | |
Vertical Distance | |
Vertical Distance Units | |
Equivalent Scale Denominator | |
Level of Detail Description |
Spatial Representation
Grid Representation Used? | |
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Vector Representation Used? | Yes |
Text / Table Representation Used? | |
TIN Representation Used? | |
Stereo Model Representation Used? | |
Video Representation Used? |
Grid Representation
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Vector Representation
Topology Level | |
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Complex Object Present? | |
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Composite Object Present? | |
Composite Object Count | |
Curve Object Present? | |
Curve Object Count | |
Point Object Present? | |
Point Object Count | |
Solid Object Present? | |
Solid Object Count | |
Surface Object Present? | |
Surface Object Count |
Reference Systems
Reference System
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Access Information
* » Security Class | Unclassified |
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* Security Classification System | |
Security Handling Description | |
• Data Access Policy | |
» 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. 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. |
Metadata Access Constraints | |
Metadata Use Constraints |
Distribution Information
Start Date | |
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» Download URL | https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=1119 |
Distributor | |
File Name | Customized Download |
Description |
Create custom data files by choosing data area, product type, map projection, file format, datum, etc. |
File Date/Time | |
File Type | |
File Size | |
Application Version | |
Compression | |
Review Status |
Start Date | |
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» Download URL | https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/1119/index.html |
Distributor | |
File Name | Bulk Download |
Description |
Simple download of data files. |
File Date/Time | |
File Type | |
File Size | |
Application Version | |
Compression | |
Review Status |
Start Date | |
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End Date | |
» Download URL | |
Distributor | |
File Name | |
Description | |
File Date/Time | |
File Type | |
FGDC Content Type | |
File Size | |
Application Version | |
Compression | |
Review Status |
Start Date | |
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End Date | |
» Download URL | |
Distributor | |
File Name | |
Description | |
File Date/Time | |
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FGDC Content Type | |
File Size | |
Application Version | |
Compression | |
Review Status |
Start Date | |
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End Date | |
» Download URL | |
Distributor | |
File Name | |
Description | |
File Date/Time | |
File Type | |
FGDC Content Type | |
File Size | |
Application Version | |
Compression | |
Review Status |
URLs
URL | https://coast.noaa.gov/dataviewer |
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Name | |
URL Type | Online Resource |
File Resource Format | |
Description |
URL | https://coast.noaa.gov |
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Name | |
URL Type | Online Resource |
File Resource Format | |
Description |
URL | |
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Name | |
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File Resource Format | |
Description |
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URL | |
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Description |
Activity Log
Activity Time | 2016-05-23 |
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Activity Type | |
Responsible Party | |
Description |
Date that the source FGDC record was last modified. |
Activity Time | 2017-11-14 |
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Activity Type | |
Responsible Party | |
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 Time | 2018-02-08 |
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Activity Type | |
Responsible Party | |
Description |
Partial upload of Positional Accuracy fields only. |
Activity Time | 2018-03-13 |
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Activity Type | |
Responsible Party | |
Description |
Partial upload to move data access links to Distribution Info. |
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Description |
Issues
Issue Date | |
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Author | |
Issue |
Issue Date | |
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Author | |
Issue |
Issue Date | |
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Author | |
Issue |
Technical Environment
Description |
Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 2; ESRI ArcCatalog 9.2.0.1324 |
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Data Quality
Representativeness | |
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Accuracy | |
Analytical Accuracy | |
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. |
Quantitation Limits | |
Bias | |
Comparability | |
Completeness Measure | |
Precision | |
Analytical Precision | |
Field Precision | |
Sensitivity | |
Detection Limit | |
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. |
» Quality Control Procedures Employed |
Data Management
» Have Resources for Management of these Data Been Identified? | |
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» Approximate Percentage of Budget for these Data Devoted to Data Management | |
» Do these Data Comply with the Data Access Directive? | |
» Is Access to the Data Limited Based on an Approved Waiver? | |
» If Distributor (Data Hosting Service) is Needed, Please Indicate | |
» Approximate Delay Between Data Collection and Dissemination | |
» If Delay is Longer than Latency of Automated Processing, Indicate Under What Authority Data Access is Delayed |
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» Actual or Planned Long-Term Data Archive Location | |
» If World Data Center or Other, Specify | |
» If To Be Determined, Unable to Archive, or No Archiving Intended, Explain |
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» Approximate Delay Between Data Collection and Archiving | |
» How Will the Data Be Protected from Accidental or Malicious Modification or Deletion Prior to Receipt by the Archive? |
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Lineage
» Lineage Statement |
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Sources
Citation Title | Countywide Digital Contour Mapping Project |
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Contact Role Type | |
Contact Type | |
Contact Name | |
Publish Date | 2008-06-30 |
Extent Type | Range |
Extent Start Date/Time | 2008-02-14 |
Extent End Date/Time | 2008-02-25 |
Scale Denominator | 1200 |
Citation URL | |
Citation URL Name | |
Citation URL Description | |
Source Contribution |
Onboard Laser | Source Geospatial Form: model | Type of Source Media: disc |
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Scale Denominator |
Process Steps
Process Step Number | 1 |
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» Description |
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. |
Process Date/Time | 2008-01-06 00:00:00 |
Process Contact | |
Phone (Voice) | |
Email Address | |
Source |
Process Step Number | 2 |
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» Description |
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. |
Process Date/Time | 2011-11-15 00:00:00 |
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Acquisition Information
Instruments
Instrument Unavailable Reason |
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Description |
Platforms
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FAQs
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Child Items
Rubric scores updated every 15m
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Related Items
Item Type | Relationship Type | Title |
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Catalog Details
Catalog Item ID | 49695 |
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Metadata Record Created By | Anne Ball |
Metadata Record Created | 2017-11-15 15:21+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 Workflow State | Published / External |
Metadata Last Review Date | 2022-03-16 |
Metadata Review Frequency | 1 Year |
Metadata Next Review Date | 2023-03-16 |
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