James W. Sewall Company


Sewall provides integrated geospatial, engineering, and forestry consulting services to clients in government and industry. Our diverse portfolio is based on 100 years' experience in surveying, forestry, and engineering; 60 years’ in aerial mapping; and 20 years’ in GIS and software application development. In the last 10 years, our offerings have expanded to include web hosting services, software as a service, and Sewall GeoPower™, a portal platform for the collection, distribution, and resale of geospatial data.




Product Name: Aerial Photography
Product Category: Satellite and Raster airborne - Data Providers

Sewall photopilots have decades of experience in flight planning, aerial photography, and aerial survey quality control. Recognizing the time-sensitive nature of aerial photography projects, we respond quickly to unpredictable weather, narrow windows of opportunity, and tight project schedules. Sewall owns and maintains a fleet of twin-engine aircraft, precision-calibrated mapping cameras, and airborne GPS to aid in flightline navigation

Product Name: Municipal GIS Development
Product Category: GIS Services - Service Providers

Sewall provides comprehensive services in GIS development and maintenance to municipal, city, and county governments throughout the country. We assist our clients through every phase of a GIS project, from needs assessment and initial planning to system implementation and training. To address the critical issue of homeland security, we are prepared to build in data sets and applications for emergency planning, deployment, and response.

Product Name: Photogrammetric Mapping
Product Category: Photogrammetric/DEM Services - Service Providers

With production facilities in Old Town and Kentucky, Sewall is one of the largest photogrammetric mapping firms in the country. We produce accurate planimetric and topographic maps from aerial photography to meet the diverse needs of municipalities, state and federal governments, engineering firms, and utility companies.

Product Name: Surveying and GPS
Product Category: Photogrammetric/DEM Services - Service Providers

Sewall offers a broad range of surveying services from high-order geodetic surveys for photogrammetric map control to wetlands and utilities location. To assist clients in such fields as municipal operations, utilities management, forestry, and civil engineering, Sewall has developed expertise in determining the accuracy required for diverse applications and the most efficient methods of acquisition. Sewall surveyors also perform standard boundary surveys, title surveys, topographic surveys for engineering design and construction layout, and hydrographic surveys of rivers and oceans.


136 Center Street, P.O. Box 433
Old Town, ME 04468-0433
United States
Phone: 800-648-4202
Fax: 207-827-3641
Contact us
Url: http://www.sewall.com/index.php



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Upcoming Events
Locate 2018 at Pier 27, The Embarcadero San Francisco CA - May 30 - 31, 2018
2nd WY UAV Symposium at UW Convention Center 2229 Grand Ave LARAMIE WY - May 30 - 31, 2018
GeoIntelligence Asia at NEW DELHI India - Jun 4 - 5, 2018
SPAR 3D & AEC Next Technology Expo + Conference at Anaheim Convention Center Anaheim CA - Jun 5 - 7, 2018
Teledyne Optech
Bentley: -YII 2018 Awards



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