2007 Northwest Florida Water Management District (NWFWMD) Lidar: Portions of Bay, Calhoun, Jackson and Washington Counties2007 Northwest Florida Water Management District (NWFWMD) Lidar: Portions of Bay, Calhoun, Jackson and Washington Counties Metadata also available as Metadata: Identification_Information Data_Quality_Information Spatial_Data_Organization_Information Spatial_Reference_Information Distribution_Information Metadata_Reference_Information Identification_Information: Citation: Citation_Information: Originator: Northwest Florida Water Management District (NWFWMD) Publication_Date: 20071105 Title: 2007 Northwest Florida Water Management District (NWFWMD) Lidar: Portions of Bay, Calhoun, Jackson and Washington Counties Geospatial_Data_Presentation_Form: Map Publication_Information: Publication_Place: Charleston, SC Publisher: NOAA's Ocean Service, Coastal Services Center (CSC) Online_Linkage: Description: Abstract: LIDAR data is remotely sensed high-resolution elevation data collected by an airborne collection platform. Using a combination of laser range finding, GPS positioning and inertial measurement technologies; LIDAR instruments are able to make highly detailed Digital Elevation Models (DEMs) of the earth's terrain, man-made structures and vegetation. Using a LH Systems ALS50 Light Detection And Ranging (LiDAR) system, 262 flight lines of high density (submeter ground sample distance) data were collected over areas in Bay, Calhoun, Jackson and Washington Counties in Florida. This data set was collected at the same time as the collection for Jefferson County, FL. Collectively, these data sets cover approximately 1201 square miles. The data acquisition occurred in 17 missions between February 22, 2007 and March 13, 2007. Multiple returns were recorded for each laser pulse along with an intensity value for each return. This data was collected at sub-meter resolution to provide average point spacing of 0.7 m for collected points. Up to 5 returns were recorded for each pulse in addition to an intensity value. Purpose: The data was collected to support regulatory, land management and acquisition, planning, engineering, and habitat restoration projects. It will also support the creation of Federal Emergency Management Agency Flood Insurance Rate Maps (FEMA FIRM) and an integrated ground surface model for portions of these counties. Supplemental_Information: Reflective surface data represents the DEM created by laser energy reflected from the first surface encountered by the laser pulse. Some energy may continue beyond this initial surface to be reflected by a subsequent surface as represented by the Last Return data. Intensity information is captured from the Reflective Surface pulse and indicates the relative energy returned to the sensor as compared to the energy transmitted. The Intensity image is not calibrated or normalized but indicates differences in energy absorption due to the interaction of the surface materials with laser energy at the wavelength transmitted by the sensor. Points are classified as on ground surface or not on ground surface to support creation of a bare earth model from the data. Points in the filtered ground class determined to be in open waterways or water bodies were reclassified as Water. The Preliminary Report for the data in Bay County may be viewed at: The Final Report for the data in the counties of Calhoun, Jackson and Washington may be viewed at: Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20070222 Ending_Date: 20070313 Currentness_Reference: Ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -85.891976 East_Bounding_Coordinate: -85.294776 North_Bounding_Coordinate: 30.647342 South_Bounding_Coordinate: 30.137242 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: Elevation Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Bathymetry/Topography Theme_Keyword: Elevation Theme_Keyword: Lidar Theme_Keyword: GRID Theme_Keyword: Digital Elevation Model Theme_Keyword: DEM Theme_Keyword: Surface Model Place: Place_Keyword_Thesaurus: None Place_Keyword: United States Place_Keyword: Florida Place_Keyword: Bay County Place_Keyword: Calhoun County Place_Keyword: Jackson County Place_Keyword: Washington County Access_Constraints: None 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. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Northwest Florida Water Management District (NWFWMD) Contact_Person: John Crowe Contact_Address: Address_Type: Mailing and physical address Address: 81 Water Management Dr. City: Havana State_or_Province: Florida Postal_Code: 32333 Country: United States Contact_Voice_Telephone: 850-539-5999 Contact_Electronic_Mail_Address: john.crowe@nwfwmd.state.fl.us Data_Set_Credit: Northwest Florida Water Management District (NWFWMD) Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.722 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: None Logical_Consistency_Report: None Completeness_Report: LIDAR is self-illuminating and has minimal cloud penetration capability. Water vapor in steam plumes or particulates in smoke may cause reflection of LIDAR signals and loss of elevation information beneath these plumes. Glass structures and roofs may appear transparent to the LIDAR signal and therefore may not register on the reflective surface. Some asphalt formulations have been shown to absorb topographic LIDAR wavelength energy resulting in "pitting" of roof surfaces using this material. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Compiled to meet 1 m horizontal accuracy at 95% confidence level. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Not yet determined, will be added. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Northwest Florida Water Management District (NWFWMD) Publication_Date: 20071102 Title: 2007 Northwest Florida Water Management District (NWFWMD) Lidar: Portions of Bay, Calhoun, Jackson and Washington Counties Geospatial_Data_Presentation_Form: Model Source_Scale_Denominator: 27000 Type_of_Source_Media: Digital Tape Media Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20070222 Source_Currentness_Reference: Ground condition Source_Citation_Abbreviation: Lidar Surface Source_Contribution: Type of LiDAR Scanner = LH Systems ALS50 Data Acquisition Height = 700 meters AGL Scanner Field Of View = 40 degrees Scan Frequency = 35 Hertz Pulse Repetition Rate - 50 Kilohertz Aircraft Speed = 120 KIAS Swath Width = +/- 20 degrees Nominal Ground Sample Distance = 0.7 meters Number of Returns per Pulse = 5 (first, last, intermediate) Distance Between Flight Lines = 365 meters Process_Step: Process_Description: Data Collection: Using a LH Systems ALS50 Light Detection And Ranging (LiDAR) system, 262 flight lines of high density (submeter ground sample distance) data were collected over areas in Bay, Calhoun, Jackson and Washington Counties in Florida. This data set was collected at the same time as the collection for Jefferson County, FL. Collectively, these data sets cover approximately 1201 square miles. The data acquisition occurred in 17 missions between February 22, 2007 and March 13, 2007. Multiple returns were recorded for each laser pulse along with an intensity value for each return. During the LIDAR campaign, the Sanborn field crew conducted a GPS field survey to establish final coordinates of the ground base stations for final processing of the base-remote GPS solutions. Four (4) airborne global positioning system (GPS) base stations were used to support the LiDAR data acquisition. GPS ground control check points were also collected by the LiDAR team while onsite for product accuracy validation and delivery. Process_Date: 20070222 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Sanborn Contact_Person: Steve Jones Contact_Position: Project Manager Contact_Address: Address_Type: Mailing and physical address Address: 1935 Jamboree Drive, Suite 100 City: Colorado Springs State_or_Province: Colorado Postal_Code: 80920-9702 Country: United States Contact_Voice_Telephone: 719.264.5482 Contact_Electronic_Mail_Address: sjones@sanborn.com Contact_TDD/TTY_Telephone: N/A Contact_Facsimile_Telephone: 719.528.5093 Process_Step: Process_Description: Airborne GPS Processing: Airborne GPS data was differentially processed and integrated with the post processed IMU data to derive a smoothed best estimate of trajectory (SBET). The SBET was used to reduce the LiDAR slant range measurements to a raw reflective surface for each flight line. The overlap between flight lines was removed to provide a homogeneous coverage, and the coverage was classified to extract a bare earth digital elevation model (DEM). Airborne GPS is differentially processed using the GrafNAV V7.50 software by Waypoint Consulting of Calgary, Alberta, Canada. The PDOP and distance separation is as follows: IMU data is processed using the PosPac V4.2 software by Applanix Corporation of Richmond Hill, Ontario, Canada. The reflective surface is derived using the ALS Post Processor software by Leica Geosystems GIS & Mapping Division of Atlanta, Georgia. The classification and quality control (QC) of LiDAR data is carried out using TerraScan software by Terrasolid Limited of Helsinki, Finland. Process_Date: 20070401 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Sanborn Contact_Person: Steve Jones Contact_Position: Project Manager Contact_Address: Address_Type: Mailing and physical address Address: 1935 Jamboree Drive, Suite 100 City: Colorado Springs State_or_Province: Colorado Postal_Code: 80920-9702 Country: United States Contact_Voice_Telephone: 719.264.5482 Contact_Electronic_Mail_Address: sjones@sanborn.com Contact_TDD/TTY_Telephone: N/A Contact_Facsimile_Telephone: 719.528.5093 Process_Step: Process_Description: IMU data Processing: IMU data provides information concerning roll, pitch and yaw of collection platform during collection event. IMU information allows the pulse vector to be properly placed in 3D space allowing the distance from the aircraft reference point to be properly positioned on the elevation model surface. IMU data is processed using the PosPac V4.2 software by Applanix Corporation of Richmond Hill, Ontario, Canada. Process_Date: 20070501 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Sanborn Contact_Person: Steve Jones Contact_Position: Project Manager Contact_Address: Address_Type: Mailing and physical address Address: 1935 Jamboree Drive, Suite 100 City: Colorado Springs State_or_Province: Colorado Postal_Code: 80920-9702 Country: United States Contact_Voice_Telephone: 719.264.5482 Contact_Electronic_Mail_Address: sjones@sanborn.com Contact_TDD/TTY_Telephone: N/A Contact_Facsimile_Telephone: 719.528.5093 Process_Step: Process_Description: Reflective Surface Generation: The reflective surface is derived using the ALS Post Processor software by Leica Geosystems GIS & Mapping Division of Atlanta, Georgia. Process_Date: 20070601 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Sanborn Contact_Person: Steve Jones Contact_Position: Project Manager Contact_Address: Address_Type: Mailing and physical address Address: 1935 Jamboree Drive, Suite 100 City: Colorado Springs State_or_Province: Colorado Postal_Code: 80920-9702 Country: United States Contact_Voice_Telephone: 719.264.5482 Contact_Electronic_Mail_Address: sjones@sanborn.com Contact_TDD/TTY_Telephone: N/A Contact_Facsimile_Telephone: 719.528.5093 Process_Step: Process_Description: LIDAR Ground Point Classification: The classification and quality control (QC) of LiDAR Ground point class is carried out using TerraScan software by Terrasolid Limited of Helsinki, Finland. In the filtering process points are classified as Ground or one of several non-Ground classes including Unclassified, Overlap, and Low Points. Process_Date: 20071001 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Sanborn Contact_Person: Steve Jones Contact_Position: Project Manager Contact_Address: Address_Type: Mailing and physical address Address: 1935 Jamboree Drive, Suite 100 City: Colorado Springs State_or_Province: Colorado Postal_Code: 80920-9702 Country: United States Contact_Voice_Telephone: 719.264.5482 Contact_Electronic_Mail_Address: sjones@sanborn.com Contact_TDD/TTY_Telephone: N/A Contact_Facsimile_Telephone: 719.528.5093 Process_Step: Process_Description: Reclassification of Water Points: LiDAR returns from open water surfaces are commonly included in the Ground class by the ground filtering algorithms. Using 2D and 3D visualization methods, 2D vector polygons were digitized for significant waterways and water bodies that were readily identifiable in the LiDAR data. These polygons were then used to re-classify points in open water from the filtered Ground class to the Water class. Process_Date: 20071101 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Sanborn Contact_Person: Steve Jones Contact_Position: Project Manager Contact_Address: Address_Type: Mailing and physical address Address: 1935 Jamboree Drive, Suite 100 City: Colorado Springs State_or_Province: Colorado Postal_Code: 80920-9702 Country: United States Contact_Voice_Telephone: 719.264.5482 Contact_Electronic_Mail_Address: sjones@sanborn.com Contact_TDD/TTY_Telephone: N/A Contact_Facsimile_Telephone: 719.528.5093 Process_Step: Process_Description: Coordinate Reprojection: Output LAS Files LIDAR points maintained in UTM coordinate system converted to Geographic projection with units of Decimal Degrees Process_Date: 20071109 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Sanborn Contact_Person: Steve Jones Contact_Position: Project Manager Contact_Address: Address_Type: Mailing and physical address Address: 1935 Jamboree Drive, Suite 100 City: Colorado Springs State_or_Province: Colorado Postal_Code: 80920-9702 Country: United States Contact_Voice_Telephone: 719.264.5482 Contact_Electronic_Mail_Address: sjones@sanborn.com Contact_TDD/TTY_Telephone: N/A Contact_Facsimile_Telephone: 719.528.5093 Process_Step: Process_Description: The NOAA Coastal Services Center (CSC) received files in LAS format. The files contained LiDAR intensity and elevation measurements. CSC performed the following processing on the data to make it available within the LiDAR Data Retrieval Tool (LDART): 1. The data were converted from NAVD88 (orthometric) heights to GRS80 (ellipsoid) heights using Geoid 03. 2. The LAS header fields were sorted by latitude and updated. 3. The data was filtered to eliminate outliers. Data received by the Northwest Florida Water Management District was processed by NOAA and delivered to the District in the spatial reference system below. Process_Date: 20080721 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC) Contact_Position: CEM Project Scientist Contact_Address: Address_Type: Mailing and physical Address: 2234 South Hobson Ave. City: Charleston State_or_Province: SC Postal_Code: 29405 Country: US Contact_Voice_Telephone: 843-740-1200 Contact_Electronic_Mail_Address: tcm@csc.noaa.gov Cloud_Cover: Unknown Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Point Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Point Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Universal Transverse Mercator UTM Zone Number: 16 Transverse Mercator Projection Scale Factor at Central Meridian: 0.999600 Longitude of Central Meridian: -87.000000 Latitude of Projection Origin: 0.000000 False Easting: 500000.000000 False Northing: 0.000000 Planar Coordinate Information Planar Distance Units: meters Coordinate Encoding Method: row and column Coordinate Representation Abscissa Resolution: 1.200000 Ordinate Resolution: 1.200000 Geodetic Model Horizontal Datum Name: North American Datum of 1983 Ellipsoid Name: Geodetic Reference System 80 Semi-major Axis: 6378137.000000 Denominator of Flattening Ratio: 298.257222 Altitude System Definition Datum Name: North American Vertical Datum of 1988 Resolution: 0.001 Distance Units: feet Encoding Method: Implicit coordinate Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC) Contact_Person: CEM Project Scientist Contact_Address: Address_Type: Mailing and physical address Address: 2234 South Hobson Ave. City: Charleston State_or_Province: South Carolina Postal_Code: 29405 Country: USA Contact_Voice_Telephone: 843.740.1200 Contact_Electronic_Mail_Address: tcm@csc.noaa.gov Hours_of_Service: 9:00am - 5:00pm Resource_Description: Downloadable Data Distribution_Liability: Any conclusions drawn from the analysis of this information are not the responsibility of NOAA, the Coastal Services Center or its partners. Custom_Order_Process: This data can be obtained on-line at the following URL: Metadata_Reference_Information: Metadata_Date: 20080815 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC) Contact_Person: CEM Project Scientist Contact_Address: Address_Type: Mailing and physical address Address: 2234 South Hobson Ave. City: Charleston State_or_Province: South Carolina Postal_Code: 29405 Country: USA Contact_Voice_Telephone: 843.740.1200 Contact_Electronic_Mail_Address: tcm@csc.noaa.gov Hours_of_Service: 9:00am - 5:00pm Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Generated by mp version 2.9.1 on Wed Sep 17 13:23:31 2008