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Metadata Identifier: gov.noaa.csc.maps:2005_FL_SWFWMD_Polk_m71

Aggregation Info | Bands | Citations | Constraints | Coverage Descriptions | Dimensions | Extents | Formats | Geographic Bounding Box
Georectified Information | Georeferenceable Information | Identifiers | Instruments | Mediums | OnlineResources | Operations
Platforms | Process Steps | Range Elements | Reference Systems | Responsible Parties | Series | Sources | Spatial Grids | Temporal Extents

MD_DataIdentification

Count Component Title Abstract
1 2005-2006 Southwest Florida Water Management District (SWFWMD) Lidar: Polk County (Including Hampton, Judy, Lake Wales, Peace River (North), and Polk District Remainder Tracts) This data set is one component of a digital terrain model (DTM) for the SWFWMD Polk District. This record includes information about the LiDAR data for the following SWFWMD tracts: Hampton, Judy, Lake Wales, Peace River (North) and Polk Remainder. All of these tracts are located in Polk County. Please see the Bounding Coordinates for each tract for the location within Polk County. Information that is specific to each tract has been maintained. HAMPTON TRACT This data set is one component of a digital terrain model (DTM) for Hampton Tract, Polk County, Florida encompassing approximately 43 square miles. This dataset is comprised of 48 LiDAR files, based on the DISTRICT 5,000' by 5,000' sheet index system (17951-17958, 18114-18121, 18363-18370, 18526-18533, 18259-18266 and 18594-18601) in the LAS file format. The raw data was collected at an average ground sample distance of 1-meter. Other components of the DTM include: 3-D breaklines along hydrographic features in the Shape file format; lake/pond polygons (in 3D) in the shape file format; obscured area polygons (in 2D) in the Shape file format; and hard/soft breaklines (in 3D) in the Shape file format. Date of Collection: 20060125 Bounding Coordinates of tract: West Bounding Coordinate: -82.035984 East Bounding Coordinate: -81.903345 North Bounding Coordinate: 28.328847 South Bounding Coordinate: 28.238391 JUDY TRACT This data set is one component of a digital terrain model (DTM) for Judy Tract, Polk County, Florida encompassing approximately 12.6 square miles. This dataset is comprised of 14 LiDAR files, based on the DISTRICT 5,000' by 5,000' sheet index system (17632-17636, 17795-17799, and 17959-17962) in the LAS file format. The raw data was collected at an average ground sample distance of 1-meter. Other components of the DTM include a personal geodatabase containing: obscured vegetation polygons; road overpass polygons; road breaklines; soft feature breaklines; water body polygons; coastal shorelines; 1-foot contours; hydrographic feature breaklines, and island polygons in accordance with the SWFWMD 2006 Topographic Database Design. Date of Collection: 20060125 Bounding Coordinates of tract: West Bounding Coordinate: -81.925929 East Bounding Coordinate: -81.848175 North Bounding Coordinate: 28.350110 South Bounding Coordinate: 28.308789 LAKE WALES This data set is one component of a digital terrain model (DTM) for Lake Wales, Polk County, Florida encompassing approximately 10.75 square miles. This dataset is comprised of 12 LiDAR files, based on the DISTRICT 5,000' by 5,000' sheet index system (22365-22367, 22528-22530, 22691-22693 and 22854-22856) in the LAS file format. The raw data was collected at an average ground sample distance of 1-meter. Other components of the DTM include: 3-D breaklines along hydrographic features in the Shape file format; lake/pond polygons (in 3D) in the shape file format; obscured area polygons (in 2D) in the Shape file format; and hard/soft breaklines (in 3D) in the Shape file format. Date of Collection: 20060125 Bounding Coordinates of tract: West Bounding Coordinate: -81.543294 East Bounding Coordinate: -81.509932 North Bounding Coordinate: 27.916603 South Bounding Coordinate: 27.868213 PEACE RIVER (NORTH) This data set is one component of a digital terrain model (DTM) for Peace River North (P692), Polk County, Florida encompassing approximately 1,149 square miles. This dataset is comprised of 1,281 LiDAR files, based on the DISTRICT 5,000' by 5,000' sheet index system in the LAS file format. The raw data was collected at an average ground sample distance of 1-meter. Other components of the DTM include: 3-D breaklines along hydrographic features in the Shape file format; lake/pond polygons (in 3D) in the shape file format; obscured area polygons (in 2D) in the Shape file format; and hard/soft breaklines (in 3D) in the Shape file format. Date of Collection: 20060227 Bounding Coordinates of tract: West Bounding Coordinate: -82.035984 East Bounding Coordinate: -81.903345 North Bounding Coordinate: 28.328847 South Bounding Coordinate: 28.238391 POLK DISTRICT REMAINDER This dataset is one component of a digital terrain model (DTM) for the Southwest Florida Water Management District's FY2007 Remainder Polk District LiDAR Mapping Project and Polk District Contours Project (L672) encompassing approximately 428 square miles in Polk County, Florida. This dataset is comprised of 478 LiDAR files, based on the FL Statewide 5,000' by 5,000' sheet index system in the LAS version 1.1 file format. LiDAR acquisition dates were January 27, January 30 through February 20, 2005. The raw data was collected at an average ground sample distance of 2.1 feet. Other components of the DTM include a personal geodatabase in accordance with the SWFWMD 2006 Topographic Database Design containing: obscured vegetation polygons; road overpass polygons; road breaklines; soft feature breaklines; water body polygons; coastal shorelines; hydrographic features breaklines; island polygons; and 1-foot contours. Final products include FEMA-compliant LIDAR-derived DTM data and 1-foot contours (for cartographic visualization purposes only) meeting or exceeding National Map Accuracy Standards for 2-foot contours. This area is not a tract, but an addition of areas to the Polk District data set. This data set consists of three areas within Polk County. The approximate bounding coordinates for each area are given below. Area 3 borders the east and north sides of the Peace River (North) and Judy Tract data sets. The bounding coordinates for Area 3 are generalized here, but it is actually a multi-sided polygon with many vertices. Date of Collection: 20050127, 20050130-20050220 Bounding Coordinates of Area 1: Area 2 Area 3 West Bounding Coordinate: -82.104809 -81.958339 -81.934587 East Bounding Coordinate: -82.033554 -81.918752 -81.380374 North Bounding Coordinate: 28.314262 28.349889 28.397394 South Bounding Coordinate: 28.171749 28.322179 27.625454
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SV_Identification

none found
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CI_Citation

Count Component Title Date Citation Identifier
1 2005-2006 Southwest Florida Water Management District (SWFWMD) Lidar: Polk County (Including Hampton, Judy, Lake Wales, Peace River (North), and Polk District Remainder Tracts)
1 Lidar Final Report
    2 None
      1 North American Datum 1983
      • 2007-01-19
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      CI_Series

      none found
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      CI_ResponsibleParty

      Count Component Individual Organization Position Email Role Linkage
      1 resourceProvider http://www.epsg-registry.org/export.htm?gml=urn:ogc:def:crs:EPSG::4269
      1 Citation URL ftp://ftp.csc.noaa.gov/pub/crs/beachmap/qa_docs/fl/swfwmd/Remainder_Polk_District_2005_LiDAR_and_Polk_District_Contours.pdf
      1 Chris O'Neill Woolpert, Inc. Technical Operations Manager chris.oneill@woolpert.com processor
      1 NOAA CSC (originator) DOC/NOAA/NOS/OCM > Office for Coastal Management, National Ocean Service, National Oceanic and Atmospheric Administration, U.S. Department of Commerce ocm.info@noaa.gov originator
      1 NOAA CSC (publisher) DOC/NOAA/NOS/OCM > Office for Coastal Management, National Ocean Service, National Oceanic and Atmospheric Administration, U.S. Department of Commerce ocm.info@noaa.gov publisher
      1 NOAA CSC(distributor) DOC/NOAA/NOS/OCM > Office for Coastal Management, National Ocean Service, National Oceanic and Atmospheric Administration, U.S. Department of Commerce ocm.info@noaa.gov distributor
      1 NOAA CSC (processor) DOC/NOAA/NOS/OCM > Office for Coastal Management, National Ocean Service, National Oceanic and Atmospheric Administration, U.S. Department of Commerce ocm.info@noaa.gov processor
      1 EPSG Registry European Petroleum Survey Group publisher http://www.epsg-registry.org/
      1 Mapping and GIS Section Southwest Florida Water Management District pointOfContact
      1 Mike Sutherland(author) Mike Sutherland DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce mike.sutherland@noaa.gov author
      1 Mike Sutherland Mike Sutherland DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce mike.sutherland@noaa.gov distributor
      1 Pamela Grothe DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce processor
      1 Southwest Florida Water Management District (SWFWMD) originator
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      CI_OnlineResource

      Count Component Linkage Name Description Function
      1 ftp://ftp.csc.noaa.gov/pub/crs/beachmap/qa_docs/fl/swfwmd/Remainder_Polk_District_2005_LiDAR_and_Polk_District_Contours.pdf Lidar Final Report information
      1 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
      1 http://www.epsg-registry.org/export.htm?gml=urn:ogc:def:crs:EPSG::4269 NAD83 Link to Geographic Markup Language (GML) description of reference system. information
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      MD_Identifier or RS_Identifier

      Count Component Code
      1 Ellipsoid in Meters
      1 urn:ogc:def:crs:EPSG::4269
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      EX_Extent

      Bounding Box Temporal Extent
      Count Component Description West East North South Start End
      1 -82.081057 -81.364396 28.357807 27.629413 2005-01-27 2006-02-27
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      EX_GeographicBoundingBox

      Count Component West East North South
      1 -82.081057 -81.364396 28.357807 27.629413
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      EX_TemporalExtent

      Count Component Start End
      1 2005-01-27 2006-02-27
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      MD_Format

      Count Component Name Version specification
      1 LAZ
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      MD_Medium

      none found
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      MD_Constraints

      Count Component Use Limitation
      1 Lidar Use Limitation These data depict the elevations at the time of the survey and are only accurate for that time. 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. Any conclusions drawn from analysis of this information are not the responsibility of NOAA or any of its partners. These data are NOT to be used for navigational purposes.
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      MD_ReferenceSystem

      Count Component Code Authority Title
      1 Ellipsoid Ellipsoid in Meters
      1 NAD83 urn:ogc:def:crs:EPSG::4269 North American Datum 1983
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      MD_GridSpatialRepresentation

      none found
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      MD_Georeferenceable or MI_Georeferenceable

      none found
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      MD_Georectified or MI_Georectified

      none found
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      MD_Dimension

      none found
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      MD_CoverageDescription or MI_CoverageDescription

      none found
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      MD_Band or MI_Band

      none found
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      MI_RangeElementDescription

      none found
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      MD_AggregateInformation

      Count Component Title Code Association Type Code
      1 Lidar Final Report crossReference
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      LE_Source or LI_Source

      none found
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      LE_ProcessStep or LI_ProcessStep

      Count Component DateTime Description
      1 2007-01-01T00:00:00 HAMPTON TRACT, JUDY TRACT, LAKE WALES, PEACE RIVER (NORTH) The LiDAR data was acquired using a Leica ALS50 from an altitude of 1,000-meters above ground level to provide an average ground sample distance of 1-meter. The scanner field of view was 44-degrees, and the scan rate was 33-hertz. First and last return data was collected along with the signal return intensity. Two redundant airborne GPS bases stations were utilized during the data acquisition with maximum line-of-sight distance between the base station and aircraft of 20-km. The LiDAR data was reduced using Grafnav (Waypoint Consulting) for GPS post-processing, PosProc (Applanix Crop) for IMU processing, ALS50 Post Processor (LH Systems) to initial LiDAR processing, TerraScan (Terrasolid) for initial point classification, and proprietary Woolpert developed software for refining the point classification and QC. The LAS files contain 4 classifications: 1 = unclassified; 2 = ground; 9 = water; and 10 = photogrammetric mass points. The class 1 consists of all points not on the ground. Class 2 consists of bare earth points. Class 9 consists of points within water polygons such as swamps and/or wetlands. Class 10 consists of supplementary mass points that were photogrametrically compiled on points features such as as peaks or pits, and they were created to maintain the accuracy of the DTM. Process Date: 20060125 POLK REMAINDER The LiDAR data was acquired using a Leica ALS50 from an average altitude of 3,000-feet above ground level to provide an average ground sample distance of 3.3-feet. The scanner field of view was 44-degrees, and the scan rate was 33-hertz. First and last return data collected along with the signal return intensity. Two redundant airborne GPS bases stations were utilized during the data acquisition with maximum line-of-sight distance between the base station and aircraft of 20-km. The LiDAR data was reduced using Grafnav (Waypoint Consulting) for GPS post-processing, PosProc (Applanix Crop) for IMU processing, ALS50 Post Processor (LH Systems) to initial LiDAR processing, TerraScan (Terrasolid) for initial point classification, and proprietary Woolpert developed software for refining the point classification and QC. The LiDAR data was reviewed in 3D using a digital photogrammetric work station using ADS40 digital stereo imagery. The LiDAR ground points are adjusted, if needed, to fit the ground. Breaklines were added to hydrologically enforce the DTM. The edited LiDAR data and the photogrammetrically compiled breaklines are merged and processed to create the final DTM files. During the production process, LiDAR data gaps between the flight lines were observed. These gaps between flight lines were corrected by adding photogrammetrically compiled mass points. These points are classified as class 10, in the LAS file. In the areas with the compiled masspoints, it may be noted that the masspoints are not as dense the areas with complete LiDAR coverage. The masspoints were compiled at a sufficient density to define the surface to contract specifications. Anomalies were noted in the 2005 Peace River North and Hampton Tract LiDAR data, during the LiDAR QA/QC process for the 2007 Remainder Polk County Project. The 2005 LiDAR datasets for Peace River North (P692) and Hampton Tract (DO19) required additional processing to ensure correct ground points classification. In areas with gaps in the LiDAR coverage, photogrammetrically compiled masspoints were added to the surface data. The LAS files contain 5 classifications: 1 = unclassified; 2 = ground; 9 = water; 10 = photogrammetric masspoints; and 11 = swamp and/or wetlands. The class 1 consists of all points not considered to be ground. Class 2 consists of bare earth (ground) points. Class 9 consists of points within water polygons. Class 11 consists of point within swamps and/or wetlands. Class 10 consists of supplementary mass points that were photogrametrically compiled on points features such as peaks or pits, and LiDAR data gaps. These points were created to maintain the accuracy of the DTM. 3D breaklines were collected at the digital photogrammetric workstation during the LiDAR data review. These breaklines were delineated to insure the DTM is hydrologically correct. Hydrologically Enforced Elevation Data is defined as "Hydro enforced TINS, DEMS, or contours ensure that top surfaces of bridges and culverts are cut by stream breaklines so that computer models will accurately represent drainage flow" per FEMA's Appendix A A.4.10. The breaklines were collected for hydrologically significant features as appropriate to support the development of the generation of 2-foot contours meeting National Map Accuracy Standards. The following breakline features were classified and separated: Closed Water Body Features, Linear Hydrographic Features, Coastal Shorelines, Road Features, Soft Features, Obscured Vegetated Areas, Island Features, Overpasses, and Bridges. Per contract specifications, culverts were not collected as part of this project. Therefore continuity of hydrographic features may not be consistent. For a complete description of survey methods, processing methods, software, system parameters, and accuracy analysis, see the Florida MTS Report of Specific Purpose Survey, SWFWMD MTS Report of DOI Survey, FY2007 Digital LiDAR (L672) (dated 4/8/2008)).
      1 2008-04-28T00:00:00 The NOAA Coastal Services Center (CSC) received the files in LAS format. The files contained Lidar elevation measurements. The data was in Florida State Plane Projection and NAVD88 vertical datum. CSC performed the following processing to the data to make it available within the LDART Retrieval Tool (LDART): 1. The data were converted from Florida State Plane West 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.
      1 2009-07-20T00:00:00 The NOAA National Geophysical Data Center (NGDC) received lidar data files via ftp transfer from the NOAA Coastal Services Center. The data are currently being served via NOAA CSC Digital Coast at http://www.csc.noaa.gov/digitalcoast/. The data can be used to re-populate the system. The data are archived in LAS or LAZ format. The LAS format is an industry standard for LiDAR data developed by the American Society of Photogrammetry and Remote Sensing (ASPRS); LAZ is a loseless compressed version of LAS developed by Martin Isenburg (http://www.laszip.org/). The data are exclusively in geographic coordinates (either NAD83 or ITRF94). The data are referenced vertically to the ellipsoid (either GRS80 or ITRF94), allowing for the ability to apply the most up to date geoid model when transforming to orthometric heights.
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      MI_Operation

      none found
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      MI_Platform

      none found
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      MI_Instrument

      none found
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