gov.noaa.nmfs.inport:50020
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)
2007 Southwest Florida Water Management District (SWFWMD) LiDAR: Hillsborough/Little Manatee Districts
swfwmd_hillsborough_m79_metadata
2008-01-01
publication
NOAA/NMFS/EDM
50020
https://www.fisheries.noaa.gov/inport/item/50020
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
WWW:LINK-1.0-http--link
Citation URL
Online Resource
download
https://coast.noaa.gov/dataviewer
WWW:LINK-1.0-http--link
Citation URL
Online Resource
download
EarthData International collected ADS-50 derived LiDAR over a portion of Hillsborough and Manatee Counties with
a one meter post spacing. The period of collection was between 12 January and 20 January 2007. The collection was performed by
EarthData Aviation, using a Leica ALS-50 LiDAR system, including an inertial measuring unit (IMU) and a dual frequency GPS
receiver. This project required eleven lifts of flight lines be collected. The product generated consisted of LiDAR bare earth
elevation models in LAS format. This data set is one component of a digital terrain model (DTM) for the Southwest Florida Water
Management District's FY 2007 Hillsborough County - Watershed Management Plan Topographic Information Mapping (L762) and FY 2007
Little Manatee River Watershed Management Plan (L604), encompassing approximately 453 square miles in Hillsborough County and 82
square miles in Manatee County. The 2007 LiDAR data set is comprised of 3-D mass points delivered in the LAS file format based
upon the District's 5,000' x 5,000' grid with 505 cells in the Hillsborough area with an additional 91 cells in the Little
Manatee area. An additional 12 cells were added to the Hillsborough area. The other DTM component is 2-D and 3-D breakline
features in the ESRI ArcGIS Personal Geodatabase format. The breaklines were collected using Aerial photography captured for
the Southwest Florida Water Management District FY 2007 Digital Orthophoto (B089) Central District One-foot Orthophoto project.
The stream breaklines were the corrected to the hillshade LiDAR data. Contours (2-foot) were generated from the DTM that meet
the National Standard for Spatial Data Accuracy (NSSDA) for 2-foot contours (FEMA specifications). Bare earth LiDAR mass point
data display a vertical accuracy of at least 0.3-feet root mean square (RMSE) in open and unobscured areas with standard
reflective quality.
Original contact information:
Contact Name: Mapping and GIS section
Contact Org: Southwest Florida Water Management District
Phone: 352.796.7211
This project was designed to provide topographic information to the Southwest Florida Water Management District to
support regulatory, land management and acquisition, planning, engineering and habitat restoration projects.
Southwest Florida Water Management District
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
notPlanned
Florida
Hillsborough County
Manatee County
Southwest Florida
US
place
Geographic Names Information System
Bare Earth
Surface
Terrain
theme
Lidar - partner (no harvest)
project
InPort
otherRestrictions
Cite As: OCM Partners, [Date of Access]: 2007 Southwest Florida Water Management District (SWFWMD) LiDAR: Hillsborough/Little Manatee Districts [Data Date Range], https://www.fisheries.noaa.gov/inport/item/50020.
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 Southwest
Florida Water Management District (SWFWMD), the Office for Coastal Management, or its partners.
unclassified
None
None
NOAA Data Management Plan (DMP)
NOAA/NMFS/EDM
50020
https://www.fisheries.noaa.gov/inportserve/waf/noaa/nos/ocmp/dmp/pdf/50020.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 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 9.0.0.535
-82.407173
-82.065375
27.634385
28.185085
| Currentness: Ground Condition
2007-01-12
2007-01-20
LiDAR bare-earth elevation models in LAS format.
The Hillsborough County Report of Topographic Survey Report may be viewed at:
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/79/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=79
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/geoid18/79/index.html
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Bulk Download
Simple download of data files.
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dataset
Accuracy
The bore sight of the LiDAR was processed against the ground control for this project which consisted
of 41 LiDAR ground survey points and 1 ABGPS base station at the operation airport. The control points were processed to FL State
Plane West NAD83/1999, and vertically to Mean Sea Level (MSL), NAVD 88 in U.S. Survey Feet. Airborne GPS data was collected
during the acquisition mission for each flight line. During the data acquisition the Positional Dilution of Precision (PDOP)
for the airborne GPS (ABGPS) was monitored and held at or below 3.5 when possible. The control points were measured by
technicians using Terrascan and proprietary software and applied to the bore sight solution for the project lines. An
independent check of the accuracy of the bare earth LiDAR product was conducted using land cover quality control points.
Horizontal Positional Accuracy
The minimum expected horizontal accuracy was tested to meet or exceed a 1.37 m (4.5 ft)
horizontal accuracy at 95 percent confidence level using RMSE(r) x 1.7308 as defined by the National Standards for Spatial
Data Accuracy (NSSDA).
Vertical Positional Accuracy
The vertical accuracy for LiDAR data over well-defined surfaces meets the Federal Geographic
Data Committee's (FGDC) published National Standard for Spatial Data Accuracy (NSSDA). Vertical accuracies at the 95 percent
confidence level for flat terrain were required, and all systematic errors were eliminated to the greatest extent possible and
the errors were normally distributed. Accuracy was tested to meet a 14.94 cm (0.5 ft) fundamental vertical accuracy at 95
percent confidence level using RMSE (z) x 1.9600 as defined by the National Standards for Spatial Data Accuracy (NSSDA).
Completeness Measure
Cloud Cover: 0
Completeness Report
The following methods are used to assure LiDAR accuracy.
1. Use of IMU and ground control network utilizing GPS techniques.
2. Use of airborne GPS in conjunction with the acquisition of LiDAR.
3. Measurement of quality control ground survey points within the finished product.
The following software is used for the validation:
1. Terrascan
2. EarthData Proprietary Software
Conceptual Consistency
Compliance with the accuracy standard was ensured by the collection of GPS ground control after the
acquisition of aerial LiDAR and the establishment of a GPS base station at the Sarasota-Bradenton International Airport. The
following checks were performed.
1. The ground control and airborne GPS data stream were validated through a fully analytical bore sight adjustment.
2. The DTM (Digital Terrain Model) data were checked against the project control.
3. LiDAR elevation data was validated through an inspection of edge matching and visual inspection for quality (artifact removal).
The airborne GPS data were processed and integrated with the IMU. The results were imported into the
processing system for use in the LiDAR bore sight. The raw LiDAR data was downloaded onto a production server. The ground
control and airport GPS base station were used in conjunction with the processed ABGPS results for the LiDAR bore sight.
The properly formatted processing results were used for subsequent processing.
2007-03-27T00:00:00
EarthData has developed a unique method for processing LiDAR data to identify and remove elevation points
falling on vegetation, buildings, and other aboveground structures. The algorithms for filtering data were utilized within
EarthData's proprietary software and commercial software written by TerraSolid. This software suite of tools provides
efficient processing for small to large-scale, projects and has been incorporated into ISO 9001 compliant production work flows.
The following is a step-by-step breakdown of the process. Lidar editing workflow process for 2007 SWFWMD
1.Initial Lidar classification - initial classification is performed by separating the last return points and other return
points into different files. Only last return points will be used in Bare Earth editing. This step is accomplished during
pre-processing phase. The First of Many and intermediate returns will be merged back with last returns after Bare Earth Editing
and QC is completed for point cloud deliverables.
2. Lidar editing - the Lidar Last Return is edited to bare earth using a combination of automated and manual filtering
techniques. Existing orthophotography over the project area will be used as a reference to ensure that the editor is correctly
classifying points in areas that are either heavily vegetated or ambiguous in nature. Each tile will be individually edited
to make sure noise and vegetation points have been reclassified properly.
3. QC of Lidar classification - immediately following Lidar Editing, QC is performed to verify that points are correctly
classified. Each tile will be individually viewed and will be checked for consistent point density for each classification
and land cover type. For example, consistent density in marsh areas and open fields will be verified. Each tile will be checked
to make sure noise and vegetation points have been removed. Areas of heavy vegetation will be reviewed in profile to ensure
redundant check. An overall QC of the entire project area will be done in blocks of tiles to ensure consistency between tiles.
4. Breaklines - photogrametrically-collected breaklines will be compiled to delineate specified features in accordance with the
project scope. This is an interactive process using photogrametrically-derived stereo pairs in a 3D environment. Features
typically collected would define tops and bottoms of slopes, roads, ditches, ponds, rivers and lakes. Breaklines in wetland
areas will be collected with sufficient detail to ensure that hydrographic features are correctly represented to support
generation of 1' contours to the 2' vertical accuracy requirement. The wetland breaklines will be collected as closed polygons
and will be used in Step 8 for reclassifying wetland points.
2007-05-14T00:00:00
5. QC of breaklines - breaklines will be verified in a stereo environment by senior technicians who were not involved in the
compilation. Wetland boundaries will be verified using existing orthophotography and lidar hill shades color-coded by elevation.
This process will be used to ensure that water conditions at time of lidar acquisition were consistent with the imagery used to
compile breaklines. If there are any significant discrepancies, breaklines will be modified as necessary.
6. Streams are verified against Lidar hill shades to more accurately locate and define the path.
7. Breakline draping - following this QC step, breaklines will be draped to the lidar ground points. This will include roads
but will exclude ditches. All vector data is reviewed after this process to assure that vectors have been properly assigned
elevations in comparison to the lidar surface.
8. Reclassification - lidar points in wetlands and along ditches will be reclassified to Class 10. Islands in water Class 10
is a new classification not defined in the SWFWMD scope of work.
9. Final lidar QC - a TIN surface will be generated from lidar ground points and breaklines for a final QC. This step will
ensure that the terrain is consistent and there are no anomalies present.
10. Formatting - the final lidar tiles will be formatted for delivery. The edited Lidar Last return points and the First of
Many and Intermediate return points are merged together to complete the Point Cloud deliverable. This step will also include
the restoration of header information that is removed during processing using Terrascan software. In order to restore this
data and provide SWFWMD-required information, EarthData has written a program to ensure the proper data is added to the file
header.
11. Deliverables - Breakline Geodatabase deliverable files are created. Contours are generated, a visual QC of contours is
performed, and the geodatabase deliverable is created.
2007-05-14T00:00:00
Contour Creation after the Lidar is refined to the Bare Earth surface this surface was combined with 2D
photogrametrically collected and draped to the Lidar surface to establish an elevation on the breakline. The breakline location
was also observed in relation to where the lidar indicated terrain breaks. In areas that were obscured, such as dense
vegetation, the lidar data took precedence. As a general rule the lidar data took precedence. After the breaklines and lidar
data were reconciled to each other the data was hydrologically enforced to make sure that the flow on the streams was down hill.
MicroStation is then used to generate the contours. The contours are created at 1 foot with a 2 foot specification. After the
contours are created they are then reviewed for accuracy and consistency. After the review is completed the contours are
translated into an ESRI geodatabase for delivery.
2008-01-01T00:00:00
The NOAA Office for Coastal Management (OCM) received the files in LAS format. The files contained Lidar
intensity and elevation measurements. The data was in Florida State Plane Projection and NAVD88 vertical datum. OCM
performed the following processing to the data to make it available within the Digital Coast Data Access Viewer (DAV):
1. The data were converted from Florida State Plane West Zone 0902 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.
4. Vertical unit of measure converted from feet to meters.
2008-04-28T00:00:00
Source Contribution: EarthData International collected ALS-50-derived LiDAR over Upper Myakka Florida with a one-meter post
spacing using aircraft number N2636P. The period of collection was between 12 January and 2o January 2007. The collection
was performed by EarthData Aviation, using a Leica ALS-50 LiDAR system, serial number ALS036, including an inertial measuring
unit (IMU) and a dual frequency GPS receiver. This project required eleven lifts of flight lines to be collected. The lines
were flown at an average of 3400 feet above mean terrain using a pulse rate of 75,000 pulses per second.
| Source Geospatial Form: Remote-sensing image | Type of Source Media: External hard drive
1200
Hillsborough Little Manatee Aerial Acquisition
2007-01-20
publication
2007-01-12
2007-01-20
Source Contribution: For a previous SWFWMD project (Upper Myakka) EarthData subcontracted the ground survey tasks to Kevin J.
Chappell, Florida PSM License No. LS5818. Points that fell within the Hillsborough Little Manatee project area were
incorporated as ground control points along with newly acquired points. The Global Positioning System (GPS) was used to
establish the control network. There were a total of 41 stations occupied for this project. There were 19 new photo control
stations, 11 new LIDAR control stations, 4 temporary GPS base stations, 5 existing NSRS control stations, 1 CORS station,
and 1 airborne GPS base station used by the flight crew. The final network was adjusted using least squares. A free adjustment
and constrained adjustment were performed. The results of the free adjustment indicate an external network accuracy of better
than 3 cm in relation to NAD 1983 1999 and NAVD 1988. The results of the constrained adjustment indicate an internal network
accuracy of better than 3 cm in relation to NAD 1983 1999 and NAVD 1988. Additionally, there were a total of 17 stations
occupied for this project. There were 9 new LIDAR control stations for Little Manatee and 32 points for Hillsborough, and 1
CORS station, and 1 airborne GPS base station used by the flight crew. The final network was adjusted using least squares.
A free adjustment and constrained adjustment were performed. The results of the free adjustment indicate an external network
accuracy of better than 3 cm in relation to NAD 1983 1999 and NAVD 1988. The results of the constrained adjustment indicate
an internal network accuracy of better than 3 cm in relation to NAD 1983 1999 and NAVD 1988. Eighty LiDAR QC points, broken
down into four sets of urban, bare und, brush and forest were collected. A full survey control report has been provided to
SWFWMD.
| Source Geospatial Form: Diagram | Type of Source Media: Paper
1200
Report of GPS Survey Hillsborough and Little Manatee River Basin, FL
2007-02-18
publication
2006-01-14
2007-03-13
otherRestrictions
otherRestrictions
Access Constraints: None | Use Constraints: This data is not valid without the signed and sealed Florida MTS Report of Specific Purpose Survey,
FY2007 Hillsborough County Watershed Management Plan Topographic Information Mapping (L762) Refer to this report for user
constraints.