Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC)201310111200FY 2013 GEORGIA DNR ELEVATION DATA Morgan, Putnam, Hancock, and Baldwin Counties - Inland Ponds and Lakes Breaklinesvector digital data
TASK NAME:FY 2013 GEORGIA DNR ELEVATION DATA
NOAA Contract No. EA133C11CQ0010
Requisition No. NCNP0000-12-02645
Woolpert Order No. 72875
CONTRACTOR: Woolpert, Inc.
LiDAR data is a remotely sensed high resolution elevation data collected by an airborne platform. The LiDAR sensor uses a combination of laser range finding, GPS positioning, and inertial measurement technologies. The LiDAR systems collect data point clouds that are used to produce highly detailed Digital Elevation Models (DEMs) of the earth's terrain, man-made structures, and vegetation. The task required the LiDAR data to be collected at a nominal pulse spacing (NPS) of 1.0 meter. The final products include full classified LAS, hydrologically flattened four (4) foot pixel raster DEM's of the bare earth surface in IMG Format, and hydrologically flattened breaklines in gdb format.This task order consisted of LiDAR data acquisition and processing for the National Oceanic and Atmospheric Administration's (NOAA) Coastal Services Center (CSC) four Counties in Georgia: Morgan, Putnam, Hancock, and Baldwin. The LiDAR data acquisition and processing for Morgan, Putnam, Hancock, and Baldwin Counties was performed in the Winter of 2012. The LiDAR data was provided to NOAA CSC, as part of the FY 2013 Georgia Elevation Data task order. The task order area for Morgan, Putnam, Hancock, and Baldwin Counties was approximately 1455 square miles. The LiDAR data was collected to meet Fundamental Vertical Accuracy (FVA) Root Mean Square Error (RMSE) of 18.0 cm or better at a 95% confidence level, so that when combined with breaklines, the data adequately supports the generation of two (2) foot FEMA compliant contours. The final LiDAR data was delivered in 5,000' x 5,000' tiles using NAD 1983(2011), Georgia State Plane Coordinate System, West Zone, and expressed in US Survey Feet for Morgan and Putnam Counties. The final LiDAR data was delivered in 5,000' x 5,000' tiles using NAD 1983(2011), Georgia State Plane Coordinate System, East Zone, and expressed in US Survey Feet for Baldwin and Hancock Counties. The vertical datum used for this survey is North American Vertical Datum 1988 (NAVD88), and expressed in US Survey Feet.
NOAA Contract No. EA133C11CQ0010
Requisition No. NCNP0000-11-02615
Woolpert Order No. 072278
CONTRACTOR: Woolpert, Inc.
The reflective surface data represents the DEM created by the 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. The bare earth model is created by identifying the returns that fall on the ground surface and by interpolating a surface between these points. In this manner, buildings and vegetation are removed from the bare earth model. This data set does not include bridges and overpasses in the bare earth model as the delineation point for these structures is not reliably discernable in the LiDAR data.
201212192012122220121228201212302013010420130105ground conditionAs needed-83.704424-82.73928133.83107232.901943NoneBreaklinesPolygonZNoneUnited StatesGeorgiaMorganPutnamHancockBaldwinNoneUsers 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.NOAA Coastal Services Centermailing and physical
2234 South Hobson Ave.
CharlestonSC29405USA(843) 740-1202 csc.info@noaa.gov8:00 a.m. to 5:00 p.m. Eastern TimeUnclassifiedUnclassifiedUnclassifiedThe LiDAR collected for this task order was collected to meet a Fundamental Vertical Accuracy (FVA) of NSSDA RMSEZ = 18cm (NSSDA AccuracyZ 95% = 30cm) or better; assessment procedures to comply with FEMA, NSSDA, NDEP, and ASPRS guidelines.18 cm RMSEPoints measured will produce an error less than 18.0 cm RMSE.All formatted data are validated using commercial GIS software to ensure proper formatting and loading prior to delivery.The LiDAR data is visually inspected for completeness to ensure that are no gaps between flight lines.Horizontal accuracy is +/- 4-foot at the 95% confidence level using RMSE(r) x 1.7308 when compared to the classified lidar as defined by the FGDC Geospatial Positional Accuracy Standards, Part 3: NSSDA.4.0 feet LiDAR system calibration is available in the project report.The LiDAR data vertical accuracy RMSE is 0.17 feet when compared to the classified lidar. The data collected under this Task Order meets the FEMA, NSSDA, NDEP, and ASPRS guidelines for accuracy standards. These standards specify that vertical accuracy be reported at the 95 percent confidence level for data tested by an independent source of higher accuracy.(http://www.fgdc.gov/standards/projects/FGDC-standards-projects/accuracy/part3/index_html). Twenty-Three(23) survey control points were surveyed by Woolpert survey crews and used for lidar processing. Twenty-Two(22) control points were were surveyed by Woolpert survey crews and used for the independent survey control point accuracy reporting. The Fundamental Vertical Accuracy (FVA) of the TIN: 0.333 feet at a 95% confidence level, tested against the TIN using independent survey control points, derived according to NSSDA. 0.333 feet Fundamental Vertical Accuracy (FVA)Vertical Accuracy Statistics Morgan, Hancock, Putnam, and Baldwin:
Tested 0.333 feet fundamental vertical accuracy at 95 percent confidence level when compared to the classified lidar in open terrain using RMSE(z) x 1.9600.Using an Optech Gemeni LiDAR system, 142 flight lines of high density data, at a nominal pulse spacing (NPS) of 1.0 meter, were collected over Morgan, Hancock, Putnam, and Baldwin Counties, GA (approximately 1455 square miles). Multiple returns were recorded for each laser pulse along with an intensity value for each return. A total of thirteen (13) missions were flown on December 19, 22, 28, 30 in 2012 and January 4 and 5 in 2013. The geoid used to reduce satellite derived elevations to orthometric heights was GEOID12A. The horizontal datum used for this survey is NAD 1983(2011), Georgia State Plane Coordinate System, West Zone, and expressed in US Survey Feet for Morgan and Putnam Counties. The horizontal datum used for this survey is NAD 1983(2011), Georgia State Plane Coordinate System, East Zone, and expressed in US Survey Feet for Baldwin and Hancock Counties. The vertical datum used for this survey is North American Vertical Datum 1988 (NAVD88), and expressed in US Survey Feet. 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. 201212201200Woolpert, Inc.Geospatial Servicesmailing and physical address
4454 Idea Center Blvd.
DaytonOH45430USA(937) 461-5660(937) 461-07438:00 a.m. to 5:00 p.m. Eastern TimeThe Optech Gemeni LiDAR system calibration and performance is verified on a periodic basis using Woolpert's calibration range. The calibration range consists of a large building and runway. The edges of the building and control points along the runway have been located using conventional survey methods. Inertial measurement unit (IMU) misalignment angles and horizontal accuracy are calculated by comparing the position of the building edges between opposing flight lines. The scanner scale factor and vertical accuracy is calculated through comparison of LiDAR data against control points along the runway. Field calibration is performed on all flight lines to refine the IMU misalignment angles. IMU misalignment angles are calculated from the relative displacement of features within the overlap region of adjacent (and opposing) flight lines. The raw LiDAR data is reduced using the refined misalignment angles. 20121200Woolpert, Inc.Geospatial Servicesmailing and physical address
4454 Idea Center Blvd.
DaytonOH45430USA(937) 461-5660(937) 461-07438:00 a.m. to 5:00 p.m. Eastern TimeOnce the data acquisition and GPS processing phases are complete, the LiDAR data was processed immediately to verify the coverage had no voids. 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 task order.201212201200Woolpert, Inc.Geospatial Servicesmailing and physical address
4454 Idea Center Blvd.
DaytonOH45430USA(937) 461-5660(937) 461-07438:00 a.m. to 5:00 p.m. Eastern TimeThe individual flight lines were inspected to ensure the systematic and residual errors have been identified and removed. Then, the flight lines were compared to adjacent flight lines for any mismatches to obtain a homogenous coverage throughout the project area. The point cloud underwent a classification process to determine bare-earth points and non-ground points utilizing "first and only" as well as "last of many" LiDAR returns. This process determined bare-earth points (Class 2), noise (Class 7), water (Class 9) ignored ground (Class 10), unclassified data (Class 1), overlap default(Class 17), and overlap ground (Class 18). The bare-earth (Class 2 - Ground) LiDAR points underwent a manual QA/QC step to verify that artifacts have been removed from the bare-earth surface. The surveyed ground control points are used to perform the accuracy checks and statistical analysis of the LiDAR dataset.201212201200Woolpert, Inc.Geospatial Servicesmailing and physical address
4454 Idea Center Blvd.
DaytonOH45430USA(937) 461-5660(937) 461-07438:00 a.m. to 5:00 p.m. Eastern TimeBreaklines defining lakes, greater than two acres, and double-line streams, wider than 100 feet (30.5 meters), were compiled using digital photogrammetric techniques as part of the hydrographic flattening process and provided as a geodatabase containing ESRI Polyline Z and Polygon Z feature classes. Breaklines defining water bodies and streams were compiled for this task order. The breaklines were used to perform the hydrologic flattening of water bodies, and gradient hydrologic flattening of double line streams. Lakes, reservoirs and ponds, at a nominal minimum size of two (2) acres or greater, were compiled as closed polygons. The closed water bodies were collected at a constant elevation. Rivers and streams, at a nominal minimum width of 100 feet (30.5 meters), were compiled in the direction of flow with both sides of the stream maintaining an equal gradient elevation. The hydrologic flattening of the LiDAR data was performed for inclusion in the National Elevation Dataset (NED). Woolpert hydro breakline horizontal and vertical placement is based on Woolpert collected LiDAR for FY12. 201305201200Woolpert, Inc.Geospatial Servicesmailing and physical address
4454 Idea Center Blvd.
DaytonOH45430USA(937) 461-5660(937) 461-07438:00 a.m. to 5:00 p.m. Eastern TimeVectorNAD 1983 (2011) StatePlane Georgia East FIPS 1001 Feet0.9999-82.1666666666666730.0656166.66666666650.0coordinate pair0.0000000072856942701093910.000000007285694270109391foot_usNAD 1983 (2011) StatePlane Georgia West FIPS 1002 Feet0.9999-84.1666666666666730.02296583.3333333330.0coordinate pair0.0000000072856942701093910.000000007285694270109391foot_usD NAD 1983 2011GRS 19806378137.0298.257222101North American Vertical Datum of 19880.000100Survey FeetExplicit elevation coordinate included with horizontal coordinatesNOAA Coastal Services Centermailing and physical
2234 South Hobson Ave.
CharlestonSC29405USA(843) 740-1202 csc.info@noaa.gov8:00 a.m. to 5:00 p.m. Eastern TimeDownloadable DataWoolpert prepared the original data as set forth in the Scope of Services, in accordance with reasonable care and due diligence as set forth in this Agreement, however, due to the easily alterable nature of electronic media, files, documents, and other deliverables, Woolpert, Inc. makes no warranties, either expressed or implied, with respect to the accuracy, completeness, merchantability, or fitness for any particular purpose, including, but not limited to, use of any/all data as described within this metadata file, by any user of this data. Any use will be at the end-user’s sole risk. unknownPolygonZPolygonZ shape file for Morgan, Hancock, Putnam, and Baldwin Counties.Woolpert, Inc.FIDInternal feature number.EsriSequential unique whole numbers that are automatically generated.ShapeFeature geometry.EsriCoordinates defining the features.20131011NOAA Coastal Services Centermailing and physical
2234 South Hobson Ave.
CharlestonSC29405USA(843) 740-1202 csc.info@noaa.gov8:00 a.m. to 5:00 p.m. Eastern TimeFGDC Content Standards for Digital Geospatial MetadataFGDC-STD-001-1998