Willams-Stackhouse Incorporated
Providing Photogrammetric Mapping Services Since 1960
A significant portion of WSI's past experience include city-county projects that have required large-scale digital planimetric-topographic mapping and/or high-resolution digital orthophotos. A sampling of such projects are as follows:
WSI also has extensive TxDOT experience, having performed large-scale digital mapping and
digital orthophoto projects for a number of district offices through several engineering-surveying
contractors. A sampling of these are as follows: Additional information including references for selected projects, is provided on the pages that follow.

 Client: U.S. Department of the Navy
Southern Division Naval Facilities Engineering Command
2155 Eagle Drive
North Charleston, South Carolina 29417
 Contact: Brian VanBockern
 Duration: December, 1996 to September, 2004
 Project Size: Over 50 separate Navy installations of various sizes located in the following
states: Alabama, Arkansas, California, Florida, Georgia, Illinois, Louisiana,
Maryland, Mississippi, New York, North Carolina, Rhode Island, Tennessee,
Texas, and Virginia
 Description: As part of multiple work orders over an eight year period, WSI provided photogrammetric mapping services to the U.S. Navy through six of its engineering contractors: The Onyx Group, Inc., of Alexandria, Virginia; Dames & Moore, Inc. of Phoenix, Arizona; Huitt-Zollars, Inc. of Fort Worth, Texas; Bessent, Hammack & Ruckman, Inc. of Jacksonville, Florida; Obsidian Group, Inc. of Jacksonville, Florida; and The Environmental Company, Inc. of Charlottesville, Virginia.

This involved over 50 U.S. Navy installations located in 15 states and included both black-and-white and color aerial photography, airborne GPS, GPS ground control surveys, analytical aerial triangulation, digital topographic mapping, image scanning, and digital orthophotography. Most of the mapping was compiled with a 1-foot contour interval and consisted of 29 separate data layers. Deliveries were made in MicroStation, AutoCAD, and ArcInfo formats and all conformed to the Tri-Services Spatial Data Standards.

A portion of these installations are as follows:
  • NAS Corpus Christi, TX
  • NAS Kingsville, TX
  • NAS Meridian, MS
  • NAS Pensacola, FL
  • NAS Jacksonville, FL
  • NAS Key West, FL
  • NAS Whiting Field, FL
  • NAS Millington, TN
  • NAS JRB Fort Worth, TX
  • NAS JRB New Orleans, LA
  • NTC Great Lakes, IL
  • NETC Newport, RI
  • FCTCPAC San Diego, CA
  • FCTCLANT Damneck, VA
  • Naval Support Unit Saratoga Springs, NY
  • NAVSCSCOL Athens, GA
  • USNA Annapolis, MD
  • MCB Camp Lejeune, NC

The following e-mail relates to a recently completed project performed by WSI for the U.S. Navy at MCB (Marine Corps Base) Camp Lejeune, North Carolina.

The project was completed in August, 2004 while WSI was still operating under the Sanborn Map Company name. It consisted of more than 850 aerial photographs from which color digital orthophotos that were produced with 0.3 and 0.15 meter pixel resolutions.

 
 Client: Franklin County Auditor
373 South High Street
Columbus, Ohio 43215
Contact: Fred Buttle, Deputy Auditor/Municipal Coordinator
Duration: March, 1995 to April, 1997
February, 1996 to April, 1998
February, 2000 to December, 2002
March, 2004 to April, 2005
Project Size: 543 Square Miles
Description: WSI was awarded four contracts over a nine-year period for countywide GIS map updates and digital orthophotos. These contracts have included both black-and-white and color aerial photography at scales ranging from 1=400 to 1=800, airborne GPS, GPS ground control surveys, analytical aerial triangulation, digital topographic map updating (1=100, 2 contour interval, MetaMAP delivery format), image scanning, and both black-and-white and color digital orthophotos.

The County's GIS map base consists of 2550 map tiles (2500 x 2500) and 36 levels of data. WSI has successfully completed two countywide update cycles, which were accomplished with Zeiss Planicomp first-order analytical stereoplotters equipped with superimposition.

Since this is a growing county with a population of over one million, the changes and update requirements are significant and have included every one of the 2550 map tiles. An additional challenge involved translating the data out of and back into the Countys MetaMAP GIS format while maintaining the integrity of the attribute data.

Each contract has also included the preparation and delivery of digital orthophotos in a geo-referenced, uncompressed TIF format. Until the most recent contract, these were delivered in black-and-white with a 6 pixel resolution. For the most recent project, WSI delivered color digital orthophotos with a 3 pixel resolution. Each of the 2550 image files were 300 megabytes in size.

In connection with these projects, WSI also received contracts for add-on work from the Cities of Columbus and Westerville.
 Client: City of Abilene
555 Walnut Street
Abilene, Texas 79601
Contact: Greg Brown, GIS Manager
Duration: December, 2001 to September, 2002
January, 2005 to April, 2006
Project Size: 975 Square Miles
Description: WSI was awarded two contracts over a three year period.

The first contract was to provide black-and-white digital orthophotography (2 pixel resolution) covering all of Taylor County and portions of Jones and Callahan Counties (approximately 975 square miles). Services included black-and-white aerial photography (1=2000), airborne GPS, GPS control surveys, image scanning, analytical aerial triangulation, DEM collection, and black-and-white ortho-rectification.

The imagery was mosaiced and tone balanced for providing a seamless appearance and was then cut into 221 12,000 x 12,000 tiles. Deliveries were made in an uncompressed, geo- referenced TIF format with each file being 36 megabytes in size.

The second contract was to provide color digital orthophotography (6 and 1 pixel resolutions) and digital topographic mapping (1=100 and 1=200, 2 and 4 contour intervals, ArcView delivery format) of the area within Abilenes city limits and most of its Extra Territorial Jurisdiction (approximately 398 square miles). Services included color aerial photography (1=625 and 1=1250), airborne GPS, GPS control surveys, concrete monumentation at 8 locations, analytical aerial triangulation, and image scanning as well as the digital mapping and digital orthophoto production.

The 1=100 scale area, which required 2 contours and 6 pixel orthophotos, consisted of 380 3000 x 3000 map tiles. The 1=200 scale areas, which required 4 contours and 1 pixel orthophotos, consisted of 211 6000 x 6000 tiles.

Each of the color digital orthophotos were delivered in an uncompressed, geo-referenced TIF format and were 108 megabytes in size.
 Client: Harrison County Board of Supervisors
1801 23rd Avenue
Gulfport, Mississippi 39501
Contact: Sue Shipman
Duration: January, 2001 to October, 2002
January, 2003 to November, 2003
Project Size: 563 Square Miles
Description: WSI was awarded two contracts over a three year period for countywide GIS map updates and color digital orthophotography. These contracts included color aerial photography at three scales (1=500, 1=800, 1=2000), airborne GPS, GPS ground control surveys, analytical aerial triangulation, digital topographic map updating (1=100 with a 2 contour interval and 1=400 with a 5 contour interval, AutoCAD delivery format), image scanning, and color digital orthophotos. The map updates consisted of 443 quarter-section tiles at a scale of 1=100 and 113 four-section tiles at a scale of 1=400. This was accomplished with Zeiss Planicomp first-order analytical stereoplotters equipped with superimposition. In addition to the AutoCAD files, deliveries also included one set of 32 x 32 paper check plots. Color digital orthophotos were produced with 6 and 2 pixel resolutions using a Leica DSW300 precision photogrammetric scanner and both Leica and Boeing Autometric softcopy workstations for ortho-rectification. These were delivered in an uncompressed, geo-referenced TIF format as two sets --- one set was prepared with overlap to match the Countys existing map tiles which correspond to section lines and a second set was prepared without overlap so that the image files could be easily merged and used in a seamless manner. The County was also delivered one set of overlapping 9 x 9 color contact prints.
 Client: Lee County Tax Assessor
County Courthouse
P.O. Box 1785
Tupelo, Mississippi 38802
Contact: Mark Weathers, Tax Assessor
Duration: January, 2004 to January, 2005
Project Size: 450 Square Miles
Description: WSI was contracted to provide countywide color digital orthophotos at 6 and 1 pixel resolutions. The 6 resolution imagery was produced for the City of Tupelo and environs (approximately 81 square miles) and the 1 resolution imagery was produced for the balance of the County.

Services included color aerial photography at two scales (1=625 and 1=1250), airborne GPS, GPS control surveys, analytical aerial triangulation, DEM collection, and color digital orthophotos.

The aerial photography was acquired utilizing a Leica RC-30 precision mapping camera and consisted of approximately 800 exposures at the two flight scales.

The photography was scanned with a Leica DSW300 precision photogrammetric scanner, and the DEM collection and ortho-rectifications were performed with Leica and Boeing Autometric softcopy workstations.

The imagery was mosaiced and color balanced for providing a seamless appearance and was then cut into 252 3000 x 3000 tiles (6 pixel resolution) and 342 6000 x 6000 tiles (1 pixel resolution). Deliveries were made in an uncompressed, geo-referenced TIF format with each file being 108 megabytes in size.

Delivery also included one set of overlapping 9 x 9 color contact prints.
 Client: Tunica County, Mississippi
1058 S. Court Street, P.O. Box 639
Tunica, Mississippi 38676
Contact: Rodney Gilchrist, GIS Director
Duration: March, 1998 to June, 1999
Project Size: 460 Square Miles
Description: WSI was contracted to provide countywide photogrammetric mapping and related services. This included black-and-white aerial photography, GPS control surveys, analytical aerial triangulation, DTM collection, contour generation, digital orthophotography, and property ownership mapping.

Black-and-white aerial photography was obtained at two scales: 1"=800' for producing digital orthophotos at 1"=100', and 1"=2000' for producing digital orthophotos at 1"=400' and for DTM collection and generation of a 5' contour interval. This was accomplished using a Leica RC-30 precision mapping camera and consisted of more than 830 exposures.

Horizontal and vertical control was established using GPS at 98 locations, which included 20 pair of concrete monuments. The control data was then expanded using fully-analytical aerial triangulaton procedures with Zeiss PAT-M software.

DTMs and a 5' contour interval were compiled for the entire County using Zeiss first-order analytical stereoplotters. Delivery included one set of 140 paper check plots at 1"=400' and one set of digital files in AutoCAD format.

Digital orthophotos were also compiled of the entire County and consisted of 140 sheets at 1"=400' with a 2' pixel resolution and 280 sheets at 1"=100' with a 6 pixel resolution. This was accomplished with a Leica DSW300 precision photogrammetric scanner and a Boeing Autometric IPS Softplotter. Delivery included one set of 420 paper check plots and one set of uncompressed, geo-referenced TIF files. An image catalog was also prepared and delivered.

Property ownership and zoning maps were also prepared and delivered in AutoCAD format. This was accomplished using the services of Tri-State Consulting Services, Inc.
 Client: City of Killeen
101 North College Street
Killeen, Texas 76540
Contact: Thomas Dann, Director of Planning
Duration: February, 1994 to March, 1995
February, 2001 to May, 2001
September, 2001 to November, 2002
Project Size: 88 Square Miles
Description: WSI was awarded three contracts over a period of eight years to provide photogrammetric services for the area within the Killeen city limits and its Extra Territorial Jurisdiction. The services included black-and-white aerial photography at two scales (1=800 and 1=1000), GPS control surveys, concrete monumentation at 10 locations, analytical aerial triangulation, digital topographic mapping (1=200, 2 contour interval, AutoCAD and ArcInfo delivery formats), and black-and-white digital orthophotos.

Map data was initially compiled in 1994 and consisted of 63 4000 x 6000 tiles. This was accomplished with Zeiss Planicomp first-order analytical stereoplotters and consisted of contours and limited planimetric detail delivered in AutoCAD release 12 format. Scale-rectified, screened film positive photo enlargements (24 x 36) were also prepared to accompany each map tile.

In 2001 WSI was contracted to photogrammetrically update and expand this data to include 102 4000 x 6000 tiles. As part of this process the data was made GIS compatible and was delivered in an ArcInfo format as well as AutoCAD.

The 2001 contract also included the delivery of black-and-white digital orthophotos, which were prepared by scanning the aerial negatives with a Leica DSW300 precision photogrammetric scanner and then ortho-rectifying the images to photogrammetrically-collected DEM data. The ortho-rectification process was accomplished with both Leica and Boeing Autometric softcopy workstations.
 Client: City of Kerrville
800 Junction Highway
Kerrville, Texas 78028
Contact: Paul Menzies, GIS Project Manager
Duration: January, 2003 to September, 2003
Project Size: 94 Square Miles
Description: WSI was contracted to provide photogrammetric services for all area within the Kerrville city limits and its two-mile Extra Territorial Jurisdiction. These services included color aerial photography at two scales (1=833 and 1=1667), airborne GPS, GPS control surveys, concrete monumentation, analytical aerial triangulation, digital topographic mapping (1=200, 4 contour interval, ArcView, MicroStation SE and AutoCAD 2000 delivery formats), and color digital orthophotos.

The color aerial photography was acquired with a Leica RC-30 precision camera and consisted of more than 300 overlapping exposures.

The digital topographic mapping was compiled using Zeiss first-order analytical stereoplotters and consisted of multiple data layers which were delivered in a GIS compatible format (closed polygons, no dangling nodes, attributed contours, etc.) based on a 2000 x 3000 tile layout.

The color digital orthophotos were produced with a 1 pixel resolution to correspond to each of the map tiles. This was accomplished using a Leica DSW300 precision photogrammetric scanner and both Leica and Boeing Autometric softcopy workstations. Each image was mosaiced and color balanced for the purpose of providing seamless coverage, and deliveries were made in an uncompressed, geo-referenced TIF format.

The color images were also delivered in MrSID and ER Mapper ECW compression formats.
 Client: City of Copperas Cove
507 South Main Street
Copperas Cove, Texas 76522
Contact: Paul Boyer, City Engineer
Duration: January, 2003 to June, 2003
Project Size: 86 Square Miles
Description: WSI was contracted to provide photogrammetric services for all area with the Copperas Cove city limits and its Extra Territorial Jurisdiction. These services included color aerial photography at 1=833 scale, airborne GPS, GPS control surveys, aerial triangulation, digital topographic mapping (1=100 and 1=200, 2 contour interval, AutoCAD delivery format), and color digital orthophotos.

The aerial photography was acquired with a Leica RC-30 precision camera and consisted of approximately 180 overlapping exposures.

The digital topographic mapping was compiled using Zeiss first-order analytical stereoplotters and was done to GIS standards that will allow for a later translation to ArcInfo. In addition to the AutoCAD files, one set of 24 x 36 mylar map plots were also delivered.

The color digital orthophotos were produced with a 1 pixel resolution to correspond to each of the map tiles. This was accomplished using a Leica DSW300 precision photogrammetric scanner and both Leica and Boeing Autometric softcopy workstations. Each image was mosaiced and color balanced for the purpose of providing seamless coverage, and deliveries were made in an uncompressed, geo-referenced TIF format.

Deliveries also included one set of 9 x 9 color contact prints and five 40 x 60 color plots from a digital orthophoto mosaic covering the entire project area.
 Client: City of Del Rio
114 W. Martin Street
Del Rio, Texas 78840
Contact: Ruben Guerrero, GIS Administrator
Duration: December, 1997 to December, 1998
Project Size: 54 Square Miles
Description: WSI was contracted to provide photogrammetric services for the area within the Del Rio city limits and its Extra Territorial Jurisdiction. These services included black-and-white aerial photography at three scales (1=500, 1=700, and 1=1000), GPS ground control surveys, concrete monumentation at 20 locations, analytical aerial triangulation, digital topographic mapping (1=100 and 1=200, 2 contour interval, ArcInfo and MicroStation delivery formats), and black-and-white digital orthophotos.

The digital map compilation was accomplished with Zeiss Planicomp first-order analytical stereoplotters and consisted of 151 3000 x 3000 tiles at 1=100 scale and 19 6000 x 6000 tiles at 1=200 scale. In addition to the ArcInfo and MircoStation files, the City was also provided one set of 36 x 36 mylar plots.

The black-and-white digital orthophotos were prepared using a Leica DSW300 precision photogrammetric scanner and a Boeing Autometric softcopy workstation. These images corresponded to each map tile and were delivered in an uncompressed, geo-referenced TIF format. Each of the 170 files were 36 megabytes in size.

In addition to the original work order, WSI was contracted to fly additional aerial photography in October, 1998 immediately after the City was ravaged by flooding along the Rio Grande. This photography, as well as the various digital mapping products, was used extensively by FEMA in the floods aftermath.
 Client: Texas Tech University
171 Administration Building
P.O. Box 42004
Lubbock, Texas 79409-2004
Contact: Arthur N. Glick, Executive Associate
Duration: March, 2001 to August, 2002
Project Size: 4,240 Acres
Description: WSI was contracted to provide photogrammetric services at six Texas Tech properties --- the Main Campus in Lubbock, TX (2300 acres), the East Research Center in Lubbock, TX (105 acres), the Lubbock Lake property in Lubbock, TX (340 acres), the New Deal Farm property near New Deal, TX (960 acres), the Junction, TX property (470 acres), and the proposed Hill Country Campus in Fredericksburg, TX (65 acres).

Services included low-altitude color aerial photography (1=330), analytical aerial triangulation, digital topographic mapping (1=50, 1 contour interval, AutoCAD delivery format), image scanning, and color digital orthophotos (3 pixel resolution). Horizontal and vertical ground control was established by the Universitys survey contractor, High Tech Land and GPS Surveyors, Inc. of Lubbock, TX.

The digital topographic mapping was compiled for the Main Campus and East Research Center using Zeiss Planicomp first-order analytical stereoplotters. It was collected in multiple planimetric layers and included detail as fine as manholes, utility poles, hydrants, bicycle racks, and parking lot stripes. In addition to the AutoCAD files, deliveries also included 93 24 x 36 mylar map plots at 1=50 scale.

High-resolution color digital orthophotos were also delivered for each of the 93 map sheets at the two locations. This was accomplished using a Leica DSW300 precision scanner and both Leica and Boeing Autometric softcopy workstations for ortho-rectification. Each image was mosaiced and color balanced for the purpose of providing seamless coverage, and deliveries were made in an uncompressed, geo-referenced TIF format.

Although not orthophotos, various color photographic products were also provided for the other four sites.
 Client: Parkhill, Smith, Cooper, Inc.
4222 85th Street
Lubbock, Texas 79423
Contact: John T. Hamilton, P.E.
Duration: October, 2004 to February, 2005
Project Size: 42.4 Square Miles
Description: As part of a well project for the Canadian River Municipal Water Authority, WSI was contracted to provide photogrammetric mapping of a remote, relatively hilly area located in in Hutchinson and Roberts Counties, TX near the City of Pampa.

Services included black-and-white aerial photography (1=625), airborne GPS, analytical aerial triangulation, digital topographic mapping (1=100, 2 contour interval, AutoCAD delivery format), and black-and-white digital orthophotos with a 6 pixel resolution. Horizontal and vertical ground control was established at approximately 42 locations by PSCs survey contractor, High-Tech Land and GPS Surveyors, Inc. of Lubbock, TX.

The aerial photography was acquired using a Leica RC-30 precision camera and the map data was collected with Zeiss Planicomp first-order analytical stereoplotters. The contours were generated using a DTM collection method and planimetric features were compiled in multiple data layers. The mapping consisted of 96 2000 x 300 tiles.

Black-and-white digital orthophotos were also produced for each of the 96 tiles. This was accomplished using a Leica DSW300 precision photogrammetric scanner and both Leica and Boeing Autometric softcopy workstations. Each image was mosaiced and tone balanced for the purpose of providing seamless coverage, and deliveries were made in an uncompressed, geo-referenced TIF format.
 Client: Baseline Corporation
1702 Seamist Drive, Suite 320
Houston, Texas 77008
Contact: Pat Going, RPLS
Duration: March, 2003 to June, 2003 August, 2004 to October, 2004
Project Size: 2.5 Linear Miles
Description: Under multiple work orders over a period of eighteen months, WSI provided photogrammetric mapping along a portion of Interstate 10 and Spur 330 in Harris County, Texas near the City of Baytown. This was accomplished for the Texas Department of Transportation, Houston District through one of its survey contractors, Baseline Corporation.

Services included black-and-white aerial photography (1=250), analytical aerial triangulation using client-furnished ground control, digital topographic mapping (1=50, 1 contour interval, MicroStation 3D delivery format), and black-and-white digital orthophotos with a 3 pixel resolution.

The aerial photography was taken with a Leica RC-30 precision mapping camera and consisted of two separate missions with approximately 30-35 exposures for each.

The digital topographic mapping was compiled using Zeiss first-order analytical stereoplotters to normal TxDOT mapping standards. This included the collection and delivery of a dense DTM, which was also used for generating the 1 contours. The map data extended no less than 800 each side of the highway centerlines.

The 2004 work order also included digital orthophotos, which were produced with a Leica DSW300 precision photogrammetric scanner and both Leica and Boeing Autometric softcopy workstations. Each image was mosaiced and tone balanced for providing seamless coverage, and deliveries were made in an uncompressed, geo-referenced TIF format.

Deliveries also included two sets of overlapping 9 x 9 contact prints for each flight mission.
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