(Old Town, Maine—6 July 2004) National GIS consulting firm James W.
Sewall Company is now completing a county-wide digital orthophotography project for Bulloch County, Georgia.
Integrated in the County’s GIS, the orthophotography provides a new, accurate land base for the County to use in updating property lines, building footprints, land use, and other data layers.
Sewall’s Kentucky division, formerly Park Aerial Surveys, flew the
County this spring, capturing true-color aerial photography of the
entire County at 1”=2000’ negative scale, and of the City of Statesboro at 1”=600’ negative scale. The county-wide imagery provided the basis for 1”=400’-scale digital orthophotography with 2-foot pixel resolution; the city-wide supported orthophotography at a higher scale for the denser urban area (1”=100’ scale with 1-foot pixel resolution). To georeference and orient the aerial photography, Sewall used airborne GPS and inertial measurement technologies during the mission. Sewall surveyors also captured survey control on the ground.
When the County began GIS development in 1999, Park Aerial assisted in developing the County’s first GIS base map, acquiring black-and-white aerial photography at four different scales for the production of
orthophotography. This information served as the digital base for tax
parcels, zoning boundaries, soil tracts, and other data layers.
Paul Conner, County GIS Coordinator, reports that the County is now
using the new ortho land base to update existing data layers undergoing active change. “Sewall was particularly helpful in explaining how we could use our existing information on this project and come up with a scheme to get the job done in a cost-effective manner.” The
orthophotography and other GIS mapping are currently accessible on-line at www.bullochtaxassessors.org.
One of the fastest growing counties in Georgia, Bulloch County is a
682-square-mile area located in the eastern section of the state with a population of approximately 56,000 people.
Founded in 1880 as a surveying and engineering firm, Sewall has provided comprehensive GIS consulting services to government, utility companies, and the forest industry since the 1970s. Sewall’s expertise in GIS project implementation is supported by 50 years’ experience in aerial photography and land base mapping and 30 years’ experience in data conversion and application development. In 1999, Sewall acquired Park Aerial Surveys, a firm with 80 years’ aerial mapping experience
throughout the Southeast. As one company, Park Aerial and Sewall have mapped over 850 communities nationwide. In addition to Kentucky, Sewall has offices in Maine, New York, and North Carolina.
For more information on this project, contact Jack Renner, CP, Project
Manager, at James W. Sewall Company, 300 Envoy Circle, Suite 303,
Louisville, Kentucky 40299; 502 491 4849; Email: email@example.com