US Army Corps of Engineers ( comp.) Unknown Unknown Bluestone Lake and Down Stream 2009 Bare-Earth LiDAR vector digital data Huntington, WV US Army Engineer District, Huntington, Corps of Engineers \\LASD01-LLANDRY1\E\Bluestone_HalfTiles.shp US Army Corps of Engineers (comp) Unknown Unknown Bluestone Lake and Down Stream 2009 Bare-Earth LiDAR remote-sensing image Huntington, WV US Army Corps of Engineers (Comp) This data set represents the LiDAR bare-earth DEM that was created to fulfill the requirements of the statement of work. The bare-earth is defined as the lowest surface, last reflective surface, or LiDAR last return which represents the surface of the bare-earth terrain after removal of vegetation and man-made features. The purpose of this project was to reduce LiDAR data to produce Digital Elevation Models and related products. All processes were performed using precise compilation procedures. The process was accomplish in strict accordance with the photographic mapping criteria provided in section "C" of the contract document and the technical references contained within. 20090404 20090405 20090409 20090412 20090413 20090417 20090423 ground condition Complete Unknown -82.206771 -80.573130 38.894822 37.268612 Remote Sensing LiDAR Topographic Mapping Photogrammetric Mapping Unknown West Virginia Bluestone Lake This data set is controlled by the US Army Engineer District, Huntington, Corps of Engineers under the contract number W91237-08-D0002-D.0. The project area has two defined vertical accuracy specifications. To determine the vertical accuracy for any given area, the boundaries that were provided for processing should be reviewed to determine the accuracy for individual areas of interest. In addition to the areas within the project boundary, Northrop Grumman has provided all of the data that was acquired and processed under this task order. The areas outside of the project boundary conform to the guidelines set for the 4-foot contour areas. The data represents the results of data processing for a specific US Army Corps of Engineers activity. As such, it is only valid for use in that specific activity. The user is responsible for the results of any other use of the data US Army Corps of Engineers, Huntington District Micheal Koon CELRH-EC-DA mailing and physical address
502 Eighth Street
Huntington West Viriginia 25701 USA 304.399.5215 8:00 - 4:30 Bluestone Lake and Down Stream 2009 Bare-Earth LiDAR DEM Bluestone Lake and Down Stream 2009 Bare-Earth LiDAR DEM LAS Restricted Restricted Restricted Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.0.1770 US Army Corps of Engineers (comp) Unknown Unknown Bluestone Lake and Downstream 2009 Bare-Earth DEM raster digital data Huntington, WV US Army Engineer District, Huntington, Corps of Engineers US Army Corps of Engineers (comp) Unknown Unknown Bluestone Lake and Downstream 2009 Bare-Earth DEM remote-sensing image Huntington, WV US Army Engineer District, Huntington, Corps of Engineers 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 (GCP) 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). Ground control was established by 3001, Inc. A spatial proximity analysis was used to select edited LiDAR data points contiguous to the relevant GCPs. A search radius decision rule is applied with consideration of terrain complexity, cumulative error and adequate sample size. Cumulative error results from the errors inherent in the various sources of horizontal measurement. These sources include the airborne GPS, GCPs and the uncertainty of the accuracy of the LiDAR data points. This accuracy is achieved prior to the sub-sampling that occurs through integration with the inertial measurement unit (IMU) positions that are recorded. It is unclear at this time whether the initial accuracy is maintained. The horizontal accuracy of the GCPs is estimated to be in the range of approximately 1 to 1.6 inches. Finally, sample size was considered. The specification for the National Standard for Spatial Data Accuracy is a minimum of 20 points to conduct a statistically significant accuracy evaluation (Minnesota Planning, 1999, Positional Accuracy Handbook, Minnesota Planning Land Management Information Center, St. Paul, Minnesota., p.3). Most statistical texts indicate that a minimum of 30 sample points provide a reasonable Approximation of a normal distribution. The intent of the NSSDA is to reflect the geographic area of interest and the distribution of error in the data set (Federal Geographic Data Committee, 1998, Geospatial National Standard for Spatial Data Accuracy, Federal Geographic Data Committee Secretariat, Reston, Virginia, p.3-4). Additional steps were taken to ensure the vertical accuracy of the LiDAR data including: Step 1: Precision Bore sighting (Check Edge-matching) Step 2: Compare the LiDAR data to the Field Survey (Field survey is to FEMA specifications and more stringent internal specifications) Step 3: Automated Filtering Step 4: Manual Editing (Quality Control) Step 5: 3-D digitizing and Photogrammetric Compilation of hydrographic breaklines. The Light Detection and Ranging (LiDAR) is a topographic survey was conducted for the US Army Corps of Engineers, Huntington. The LiDAR bar-earth surface was filtered, edited, and the quality verified under the supervision of a certified photogrammetrist. The breaklines were compiled using the guidance provided in contract # W91237-08-D-002. To ensure consistency between the compiled breaklines and the LiDAR surface, a stereo pair was created from the LiDAR surface and the final breaklines were compared to the LiDAR di=uring the quality control procedures. The final quality processes included inserting the compilation into the LiDAR surface to ensure the continuity of the slope of the breaklined features. The statement of work provided explicit definitions for the features that were processed and compiled. Northrop Grumman consulted with the Huntington District to determine the grid size of the final DEM. The Horizontal accuracy of the Bluestone Lake and Downstream 2009 Bare-Earth DEM is +/- 45.72 cm. The vertical accuracy for the 2-foot contour areas of the Bluestone Lake and Downstream 2009 Bare-Earth DEM is 18.2cm and the vertical accuracy of the 4-ft contour areas is 72.6cm. US Army Corps of Engineers (comp) Unpublished Material Unknown Bluestone Lake and Downstream 2009 Bare-Earth DEM raster digital data Huntington, WV US Army Engineer District, Huntington, Corps of Engineers US Army Corps of Engineers (comp) Unpublished Material Unknown Bluestone Lake and Downstream 2009 Bare-Earth DEM remote-sensing image Huntington, WV US Army Corps of Engineers (comp) 2400 digital tape media 20090404 20090405 20090409 20090412 20090413 20090417 20090423 ground condition scale map All data was derived from the acquired LiDAR data The ABGPS, IMU, and raw scans are integrated using proprietary software developed by the Leica Geosystems and delivered with the Leica ALS50 System. The resultant file is in a LAS binary file format. The LAS file version 1.2 format can be easily transferred from one file format to another. It is a binary file format that maintains information specific to the LiDAR data (return#, intensity value, xyz, etc.). The resultant points are produced in the State Plane coordinate system West Virginia South Zone , with units in feet and referenced to the NAD83/90 HARN horizontal datum and NAVD88 vertical datum. Global Postioning System, Intertial Measurement Unit, Raw Scans 20091112 Point Cloud LAS v.1.2 Northrop Grumman Jochen Floesser Project Manager mailing and physical address
301 Voyager Way
Huntsville AL 35806 USA 256.830.3435 Jochen.floesser@ngc.com 8:00 - 4:30 The unedited data are classified to facilitate the application of the appropriate feature extraction filters. A combination of proprietary filters is applied as appropriate for the production of bare-earth digital terrain models (DTMs). Interactive editing methods are applied to those areas where it is inappropriate or impossible to use the feature extraction filters, based upon the design criteria and/or limitations of the relevant filters. These same feature extraction filters are used to produce elevation height surfaces. Point Cloud LAS v.1.2 20091112 Classified LAS v. 1.2 Northrop Grumman Jochen Floesser Project Manager mailing and physical address
301 Voyager Way
Huntsville AL 35806 USA 256.830.3435 Jochen. Floesser@ngc.com 8:00 - 4:30 Filtered and edited data are subjected to rigorous QA/QC according to the 3001 Inc. Quality Control Plan and procedures. Very briefly, a series of quantitative and visual procedures are employed to validate the accuracy and consistency of the filtered and edited data. Ground control is established by 3001, Inc. and GPS-derived ground control points (GCPs) points in various areas of dominant and prescribed land cover. These points are coded according to landcover, surface material and ground control suitability. A suitable number of points are selected for calculation of a statistically significant accuracy assessment as per the requirements of the National Standard for Spatial Data Accuracy. A spatial proximity analysis is used to select edited LiDAR data points within a specified distance of the relevant GCPs. A search radius decision rule is applied with consideration of terrain complexity, cumulative error and adequate sample size. Accuracy validation and evaluation is accomplished using proprietary software to apply relevant statistical routines for calculation of Root Mean Square Error (RMSE) and the National Standard for Spatial Data Accuracy (NSSDA) according to Federal Geographic Data Committee (FGDC) specifications. The LiDAR mass points were delivered in American Society for Photogrammetry and Remote Sensing LAS 1.1 format. The header file for each dataset is complete as define by the LAS 1.1 specification. In addition the following fields are included: Flight Date Julian, Year, and Class. The data were classified as follows: Class 1 = Unclassified- this class includes vegetation, buildings, noise etc.; Class 2 = Ground; Class 7 = Noise; Class 9 = Water; Class 12 = Overlap. The datasets were delivered in theclient provided tiling scheme. The tiles are suitable for seamless topographic data mosaics that include no "no data" areas. The names of the tiles are left padded with zeros as required to achieve a five character length and all files utilize the LAS file extension. Classified LAS 20100101 Quality Verified LASv.1.2 Northrop Grumman Corporation Jochen Floesser Project Manager mailing and physical address
301 Voyager Way
Huntsville AL 35806 USA 256.830.3435 Jochen.Floesser@ngc.com 8:00 - 4:30 The bare-earth class of the classified LAS file was extracted to facilitate the creation of the bare-earth DEM. The photgrametrically compiled breaklines were added to the LiDAr bare-earth surface using Terrasolids Terrascan and Terramodel Software. Terramodel was used to create 2-meter digital elevation models in GRID format for each LiDAR tile and the GRIDs were converted to an ESRI compatible format for delivery. Each tile went through quality control processes to ensure that the compiled breaklines adhered to the surface after interpolation. Classified LAS files v.1.2 20100212 ESRI bare-earth DEM Northrop Grumman Corporation Jochen Floesser Project Manager mailing and physical address
301 Voyager Way
Huntsville AL 35806 USA 256.830.3435 jochen.floesser@ngc.com 8:00 - 4:30 Classified LAS files v.1.2 Dataset copied.F:\New Folder\Bluestone Lake and Downstream 2009 Bare-Earth LiDAR22010021813072100 0 Point Point 1000000 State Plane Coordinate System 4702 37.483333 38.883333 -81.000000 37.000000 1968500.000000 0.000000 row and column 0.000001 0.000001 survey feet North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 GCS North American 1983NAD 1983 StatePlane West Virginia South FIPS 4702 Feet North American Vertical Datum of 1988 0.000100 feet Explicit elevation coordinate included with horizontal coordinates Mean sea level 0.000100 feet Implicit coordinate Bare-Earth LiDAR Bare-Earth LiDAR Project Scope of Work Bare-Earth LiDARBare-Earth LiDARBare-Earth LiDAR Downloadable Data 0.300 LAS1.2UnknownUnknownno compression applied UnknownUnknownUnknown UnknownUnknownUnknown US Army Corps of Engineers, Huntington District304.399.52158:00 - 4:30mailing and physical address
502 Eighth Street
HuntingtonWest ViriginaUSA25701UnknownUnknownUnknownunknown 20100215 Northrop Grumman Jochen Foesser Project Manager mailing and physical address Huntsville AL 35806
301 Voyager Way
USA 256.830.3435 FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time This metadata file should be used with the Bare-earth LiDAR digital elevation model as a reference file. Restricted RestrictedRestricted http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile 20100215enUnknown 2010021813345500{C1630AF0-2189-497D-9718-9F6C414AAEE6}2010021813072100TRUE20100218file://\\LASD01-LIDAR101\F\New Folder\Bluestone\Bluestone Lake and Downstream 2009 Bare-Earth LiDAR2Local Area Network