State of West Virginia 2015 remote-sensing image This data set consists of 470, six-inch pixel resolution (approximately half-foot), natural color orthoimages covering 328 square miles in Mineral County northeastern West Virgina. Collected orthoimagery includes a 1,000-foot buffer around the county boundary. An orthoimage is remotely sensed image data in which displacement of features in the image caused by terrain relief and sensor orientation have been mathematically removed. Orthoimagery combines the image characteristics of a photograph with the geometric qualities of a map. Digital orthophotography was developed to meet a minimum map accuracy standard of ASPRS Class I for 1”=200’ scale mapping, as designated by ASPRS Accuracy Standards for Large-Scale Maps. Each orthoimage provides imagery over a 5,000-foot by 5,000-foot block on the ground. There is no image overlap between adjacent files. The projected coordinate system is NAD83 (2011), West Virginia State Plane North Coordinate System, US Survey Feet. This data depicts geographic features on the surface of the earth. The aerial orthoimagery will serve as a base and background map in order to assist county-level tax assessment and 911 dispatch centers. 20150412 20150418 ground condition Complete irregular -79.2845554164816 -78.6455249837479 39.6557519766196 39.2311617503434 None 0.5 foot orthoimage rectified photograph rectified image orthophoto natural color orthophoto orthoimage image map U.S. Department of Commerce, 1995, Countries, dependencies, areas of special sovereignty, and their principal administrative divisions, Federal Information Processing Standard (FIPS) 10-4): Washington, D.C., National Institute of Standards and Technology. US U.S. Department of Commerce, 1987, Codes for the Identification of the States, the District of Columbia and the outlying areas of the United States, and associated areas (Federal Information Processing Standard (FIPS) 5-2): Washington, D.C., National Institute of Standards and Technology. WV None Mineral County West Virginia None None. Work outputs and products, including raw and processed data are the property of the individual counties and interlocal agreement funding partners that compromise this consortium and may not be conveyed other than mandated under Statute to any entity without prior approval of the County Boards. Users should be aware that temporal changes may have occurred since this data set was collected and that some parts of this data may no longer represent actual surface conditions. Microsoft Windows 7, MicroStation v8, XPro 6.2.1, INPHO Orthovista 6.0.1, ArcGIS 10.2.2 Radiometry is verified by visual inspection of the digital orthophoto. Slight systematic radiometric differences may exist between adjacent orthoimage files; these are due primarily to differences in source image capture dates and sun angles along flight lines. These differences can be observed in an image's general lightness or darkness when it is compared to adjacent orthoimage file coverages. Tonal balancing may be performed over a group of images during the mosaicking process which may serve to lighten or darken adjacent images for better color tone matching. All GeoTIFF tagged data and image file sizes are validated using commercial GIS software to ensure proper loading before being archived. This validation procedure ensures correct physical format and field values for tagged elements. Seamlines and tile edges are visually inspected. Seamline mismatches are not corrected unless the overall displacement exceeds one foot. Orthoimages are visually inspected for completeness to ensure that no gaps or image misplacements exist within and between adjacent images. These images are derived by mosaicking multiple images to ensure complete coverage. Source imagery is cloud free. Photography was flown during leaf-off in deciduous vegetation regions. The data was clipped to the area of interest. Void areas have a radiometric value of zero (black). Digital orthophotography was developed to meet a minimum map accuracy standard of ASPRS Class I for 1”=200’ scale mapping, as designated by ASPRS Accuracy Standards for Large-Scale Maps, meaning 90% of all well-defined ground features in the orthoimagery will fall within 4.39 feet of coordinates of the same feature obtained from a survey of higher accuracy. 2.14 Horizontal RMSE in feet Quantum Spatial 2015 remote-sensing image hard drive 20150412 20150418 ground condition AIRPHOTO Digital, color aerial imagery of the site was acquired using Leica ADS Digital Sensor. Airborne GPS/IMU data was recorded at the time of all imagery acquisition. Leica calibrated the sensors used to fly the project. Two customized planes were used to collect imagery data: a Cessna 206 Stationair (piston-single), Tail Number N7266Z, and a Rockwell Turbo Commander 690 (twin-turboprop), Tail Number N910FC. Data was collected at approximately 7000 feet, acquiring a raw capture pixel resolution of 0.48' and a bit depth of 16-bits. Based-upon the CCD Array configuration present in the ADS digital sensor, imagery for each flight line is 20,000-pixels in width. Red, Green, Blue, Near-Infrared and Panchromatic image bands were collected. The ADS 100 has the following band specifications: Red 619-651 Green 525-585 Blue 435-495 Near Infrared 808-882 all values are in nanometers Quantum Spatial, Inc. 2015 1.0 raster digital data Quantum Spatial, Inc. 2015 disc 2015 ground condition DEM The DEM was comprised of a new autocorrelated surface Data processing of ADS100 imagery and metadata is a streamlined digital workflow process utilizing Quantum Spatial, Inc.'s proprietary software and commercial softcopy photogrammetric software including XPro, Inertial Explorer and Orthovista. The ADS100 sensor GPS/IMU position and attitude data is directly processed through three separate but continuous steps: Inertial Explorer for data extracting, data analysis, and data measurement. The post-processed GPS data output is displayed onto the flight profile plot, which clearly shows the RMS values of the combined separation, C/A Code and Carrier Phase. The output GPS/IMU data is also verified by a PDOP plot and PDOP values are compared to an acceptable threshold range. The processing on ADS100 images is based on XPro software using ORIMA for bundle adjustment. Image tie points providing the observations for the least squares bundle adjustment were selected from the images using an autocorrelation algorithm. A least squares bundle adjustment of image pass points and the ABGPS was performed to develop an aerotriangulation solution for each block using XPro Triangulation software. Upon final bundle adjustment, the triangulated strips were ortho-rectified to the DEM. Upon completion of the Aero-Triangulation (AT), XPro software was used to automatically correlate a dense elevation network of x, y, z (3D) points from the stereo-viewable imagery from each flight line. With a general density of approximately one point per every 1 -2 meters, the 3-D points were reviewed and manually edited for gross errors. A National Elevation Dataset (NED) aws used for the DEM and was suitable for the accurate rectification of the aerial imagery. Orthorectified imagery is checked and radiometricly balanced in a parallel process that utilizes custom gradient correction software and the INPHO Orthovista Radiometrics editor. Once both processes have passed rigid AT and QC milestones, the imagery bands, red, green, blue, and near infrared are rectified to a 4-Band RGBN product. These orthos are passed to the mosaic team for QC, seam line placement and tiling using the interactive capabilities of Orthovista software. Following the application of seamline and final tonal adjustment, the orthoimagery is cut to a custom tiling index. 2015 Raster State Plane Coordinate System 1983 4701 39.00000000 40.25000000 -79.5 38.50000000 1968500.00000000 0.00000000 row and column 0.5 0.5 feet North American Datum of 1983 Geodetic Reference System 80 6378137 298.2572221 Natural color orthoimagery is organized in three color bands or channels which represent the red, green, and blue (RGB) portions of the spectrum. Each image pixel is assigned a triplet of numeric values, one for each color band. Numeric values range from 0 to 255. Areas where data is incomplete due to lack of full image coverage are represented with the numeric value of 0. U.S. Department of the Interior, U.S. Geological Survey, 1996, Standards for Digital Orthophotos: Reston, VA. 20151019 Quantum Spatial Sarah Zibart mailing and physical

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Lexington KY 40503 USA 859-277-8700 859-277-8901 szibart@quantumspatial.com Monday through Friday 8:00 AM to 5:00 PM (Eastern Time) If unable to reach the contact by telephone, please send an email. You should get a response within 24 hours. FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 None. None. None. Unclassified NONE