BAE SYSTEMS ADR
20040630
West Virginia Addressing and Mapping Board Program
raster digital data
Charleston, WV
West Virginia Statewide Addressing and Mapping Board
Digital color orthophotography of the State of West Virginia (WVSPC North Zone). The W.V. state plane system has two cartographic zones, north and south. This data set consists of 10,000' x 10,000' uncompressed 24-bit natural color TIFF files at a pixel resolution of 2.0'. Digital orthophotography combines the image characteristics of a photograph with the geometric qualities of a map. Digital orthophotography is a process which converts aerial photography from an original photo negative to a digital product that has been positionally corrected for camera lens distortion, vertical displacement and variations in aircraft altitude and orientation. The imagery was captured at a negative scale of 1" = 2400' in the spring of 2003 for the purpose of producing 1" = 400' orthophotos. The ortho-rectification process has achieved <9.8' ft. horizontal accuracy at a 95% confidence level. Files of the digital orthophotography are available in TIFF (Tagged Image File Format). TIFF files are approximately 75 MB in size.
Aerial survey of the state of West Virginia
20030310
20030606
ground condition
Unknown
-081.83952
-077.58379
40.68067
38.61337
None
digital orthophoto
digital image map
aerial photograph
rectified photograph
rectified image
orthophoto
DEM
Metadata Service Theme Categories
imageryBaseMapsEarthCover
None
West Virginia
Hancock County, WV
Brooke County, WV
Ohio County, WV
Marshall County, WV
Wetzel County, WV
Tyler County, WV
Pleasants County, WV
Wood County, WV
Wirt County, WV
Ritchie County, WV
Doddridge County, WV
Harrison County, WV
Marion County, WV
Monongalia County, WV
Taylor County, WV
Barbour County, WV
PrestonCounty, WV
Tucker County, WV
Grant County, WV
Hardy County, WV
Mineral County, WV
Hampshire County, WV
Morgan County, WV
Berkeley County, WV
Jefferson County, WV
None
The data represents the results of data collection/processing for a specific WVSAMB E-911 project, and indicates the general existing conditions. As such, it is only valid for its intended use, content, time, and accuracy specifications. The user is responsible for the results of any application of the data for other than its intended use.
mailing and physical address
1124 Smith Street
Room LM-10
Charleston
WV
25301
USA
304-558-4218
304-558-4963
Craig A. Neidig
West Virgina Statewide Addressing and Mapping Board
Chair WVSAMB
TIFF
The accuracy of the ground control and airborne GPS data is confirmed by the evaluation of the results of the analytical bundle adjustment. The residuals of the final adjustment ensured compliance with NSSDA standards. During the scanning of the original aerial film, the image histogram for each frame is carefully examined to ensure that the image has been scanned so that the minimum and maximum brightness values are captured to eliminate any loss of detail due to saturation of dark or light areas. The ortho-rectified images are checked for image quality and tone-balanced using a combination of techniques including adjusting the histogram of each color band in Intergraph's IRAS-C software, and using the block tone-matching algorithms provided by Orthovista software. Evaluation of the DEM includes checking the terrain data for spikes and wells, omissions, and other anomalies that do not meet the project accuracy requirements. Using the adjusted horizontal coordinates of the aerotriangulation points, their heights are interpolated from the neighboring DEM points. The interpolated coordinate of the aerotriangulation point is then compared with the actual adjusted Z value of the aerotriangulation result. Visual inspection of the stereoscopic model and contour lines is also made allowing the detection of errors in the DEM.
All imagery is visually inspected for completeness to ensure that no gaps or image misplacement exists in the image area. Imagery is mosaicked to ensure complete coverage for map sheets. The imagery has been checked to ensure that the boundary and the content has been covered in its entirety.
Orthophotography has a <9.79 ft. horizontal accuracy at 95% confidence level, National Standard for Spatial Data Accuracy (NSSDA), for a 2.0 foot Ground Resolution Distance (GRD). Horizontal accuracy determined as 1.7308 times the RMSE circular error(1.4142 x 4' = 5.657'). This requirement will not be applicable in areas where the ground is obscured on the aerial photography by foliage, prevalent smoke, or dense shadow.
All DEM data will meet a vertical accuracy of +/- ten (10) feet at the 95% confidence level consistant with NSSDA standards. This requirement will not be applicable in areas where the ground is obscured on the aerial photography by foliage, prevalent smoke, or dense shadow.
20031013
GPS Photo Control Survey for the State of West Virginia
Bridgeville, PA
T3 Global Strategies, Inc.
tabular digital data
T3 Global Strategies, Inc.
N/A
CD-ROM
20030301
20030828
ground condition
GPS Ground Control
To supplement the airborne GPS control network a total of 153 photo control points were captured as well as an additional 54 quality assurance control points that were incorporated in the quality assurance testing of the aerotriangulation. All horizontal and vertical control was prepared under the supervision of State of West Virginia licensed Professional Land Surveyors.
Aerial Imagery Acquisition of the State of West Virginia
Photo Science, Inc.
20030630
Unknown
remote-sensing image
Lexington, KY
Photo Science, Inc.
28800
filmstrip
20030310
unknown
20030606
unknown
ground condition
Aerial Photography
Aerial photography was acquired using a flight design that included a total of 8612 exposures in 440 North-South oriented flight lines and 20 cross-tie lines. Aerial photography was exposed on Kodak Color Aerial 2 film 2444. Aerial photogaphy was supplemented with the simultaneous acquisition of airborne GPS data, which captured the ground coordinate for the nadir point of each photograph. Aerial photography was exposed at an altitude of 14400' above mean terrain yielding an approximate scale of 1:28800.
BAE SYSTEMS ADR
Sandra Elfreth-Howery
124 Gaither Drive
mailing and physical address
Mt. Laurel
NJ
08054
USA
Suite 100
Project Manager
856-663-7200
856-486-7778
s.elfreth.howery@adrinc.com
0800-1700
Aerial photography was acquired using a flight design that included a total of 8612 exposures in 440 North-South oriented flight lines and 20 cross-tie lines. Aerial photography was exposed on Kodak Color Aerial 2 film 2444. Aerial photogaphy was supplemented with the simultaneous acquisition of airborne GPS data, which captured the ground coordinate for the nadir point of each photograph. Aerial photography was exposed at an altitude of 14400' above mean terrain yielding an approximate scale of 1:28800.
20040606
Aerial Photography
124 Gaither drive
mailing and physical address
Suite 100
Mt. Laurel
NJ
08054
USA
Project Manager
856-663-7200
856-486-7778
s.elfreth.howery@adrinc.com
0800-1700
BAE SYSTEMS ADR
Sandra Elfreth-Howery
Softcopy aerotriangulation utilizes the GPS ground control and image coordinate measurements which are run through bundle block adjustment software computing the exterior orientation parameters for each image of the photogrammetric project. The original aerial film was scanned utilizing a Socet Set DSW600 precision photogrammetric scanner at a resolution of 12.5 microns. Using these scans the aerotriangulation process employs a rigorous mathematical model which detects measurement errors, and corrects for systematic image distorion, film shrikage, atmospheric refraction and camera lens distortions. The final bundle adjustment results are inspected to ensure that the RMSE meets the required 1 part in 10000.
GPS Ground Control
20040130
Analytical Aerotriangulation
Aerial Photography
Project Manager
856-663-7200
856-486-7778
s.elfreth.howery@adrinc.com
0800-1700
124 Gaither Drive
mailing and physical address
Suite 100
Mt. Laurel
NJ
08054
USA
BAE SYSTEMS ADR
Sandra Elfreth-Howery
Aerial Photography
The procedure utilized for the development of the DTM/DEM development used a combination of automated and manual techniques. The initial phase produced an intermediate terrain data set using a series of automatic data processing algorithms known as Automatic Terrain Extraction. This data set is further refined using a series of automatic filtering techniques, along with visual inspection and editing processes to produce a fully compliant DEM meeting the project specifications. To enhance the results of the ATE process linear and polygonal break line information was collected in all areas where a more rigorous data set was required to define changing terrain conditions. This break line data is then merged into the correlated terrain file and used to influence the DTM by correcting areas where the ATE process has failed to depict the terrain accurately.
20040630
DTM/DEM
Analytical Aerotriangulation
Socet Set ver 4.2.1
Project Manager
mailing and physical address
124 Gaither Drive
Mt. Laurel
NJ
08054
USA
Suite 100
856-663-7200
856-486-7778
s.elfreth.howery@adrinc.com
0800-1700
BAE SYSTEMS ADR
Sandra Elfreth-Howery
Digital orthorectification includes a spatial and radiometric transformation of the scanned image from line/sample space into the specified ground coordinate system. The interior and exterior orientation parameters from the aerotriangulation process are used to project each pixel into the ground coordinate system, while the DEM is used to correct for relief displacement. The Color orthophotos are generated by Intergraph's Base Rectifier using a cubic convolution algorithm. Once the images are ortho-rectified, they are checked for geometric accuracy and image quality, and tone-balanced. The individual overlapping orthophotos are mosaicked together using Automatic Image Mosaicker (AIM) software into one seamless image data set. Final tiles are then extracted from the image set to the State of West Virginia's tiling scheme.
Aerial Photography
20040630
Color Digital Orthophotography
Analytical Aerotriangulation
DTM/DEM
Analytical aerotriangulation
BAE SYSTEMS ADR
20040130
Unknown
tabular digital data
Mt. Laurel, NJ
BAE SYSTEMS ADR
CD-ROM
Analytical aerotriangulation
Softcopy aerotriangulation was performed utilizing the airborne GPS data, GPS ground control and image coordinate measurements allowing the direct computation of the exterior orientation parameters for each image of the project.
20040130
ground condition
All files are inspected by the Production Manager to ensure that they conform to the specified file naming conventions, all files load in their correct geographic position when loaded using the ASCII file header, all files conform to the project specifications for pixel resolution, file standard, dimensions, and compression, and all files do not contain blemishes such as visible seam lines, tone differences, data dropout or artifacts; scan swathing, or warped bridges and overpasses.
Raster
State Plane Coordinate System
4701
39.000000
-79.50000
38.500000
1968500.000000
40.25
0.000000
coordinate pair
0.000024
0.000024
survey feet
North American Datum of 1983
Geodetic Reference System 80
6378137.000000
298.257222
0.1
Explicit elevation coordinate included with horizontal coordinates
North American Vertical Datum of 1988
feet
A digital number from 0 to 255 will be assigned to each pixel. This number refers to a color look-up table which will contain the red, green, and blue (RGB) values, each from 0 to 255, for that digital number.
West Virginia Statewide Adressing and Mapping Board
mailing and physical address
1124 Smith Street
Charleston
WV
25301
USA
Room LM-10
304-558-4218
304-558-4963
cneidig@gis.state.wv.us
0800-1600, ET
Downloadable Data
!!!!!!!SAMPLE !!!!!!!!!The State of West Virginia provides the 2003 high resolution orthophotography data "as is". The State makes no guarantee or warranty concerning the accuracy of information contained in the data. Also, the State makes no warranty, either expressed or implied, regarding the condition of the product or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these data files have been processed successfully on computers at the State, no warranty is made by the State regarding the use of the data on any other system, nor does the fact of distribution constitute or imply such a warranty.
Unknown
Unknown
20040130
Sandra Elfreth-Howery
BAE SYSTEMS ADR
Project Manager
mailing and physical address
124 Gaither Drive
Suite 100
Mt. Laurel
NJ
08054
USA
856-663-7200
856-486-7778
s.elfreth.howery@adrinc.com
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
local time
20040129
13261200
20040129