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Experience
in the Field
Selected Projects
With over 100 years
of customer service, Sewall has significant experience in geospatial
data acquisition, landbase development, data conversion, systems
implementation, data analysis, software development, and data maintenance.
To meet the needs of our clients, we have completed projects throughout
the contiguous United States and in Canada, Alaska, the U.S. Virgin
Islands, Ireland, Argentina, Belize, and Australia. The following
list of recent projects indicates our broad capabilities in-house.
LOCAL,
STATE, AND FEDERAL GOVERNMENT
Cadastral
Data Conversion
Jackson County, Mississippi
Conversion of over 90,000 parcels in 731-square-mile area to ArcInfo
utilizing existing orthophotography as a landbase.
Cadastral
Data Conversion
Mecklenburg County, North Carolina
Conversion of approximately 240,000 parcels to ArcInfo format,
using manual recompilation. Extensive ArcInfo application development.
Inspection
Survey for Bridge Modernization
Parsons Transportation Group, Inc., New York, New York
Three-dimensional inspection survey of the Waldo-Hancock Bridge,
Verona and Prospect, Maine, utilizing GPS control and digital close-range
photogrammetry.
Landbase
Mapping and Orthophotography
Town of Northborough, Massachusetts
Acquisition of color aerial photography and survey control and production
of orthophotography for municipal GIS. Deed research and compilation
of property lines on the planimetric landbase.
Terrain Modeling and Dredging Analysis with ArcGIS
Army Corps of Engineers, Cape Cod Canal, Massachusetts
Migration of landbase data, digital orthophotography, and infrastructure
mapping from ESRI ArcView to ArcGIS Desktop and geodatabase, plus
custom development of dredging and volumetric analysis software
tools.
Aerial Photography for DOT Highway Projects
New York Department of Transportation, Albany, New York
Annual aerial photography and airborne GPS missions to acquire both
color and black-and-white photography of various highway projects
throughout the State of New York.
Color Infrared
Photography for Environmental Management
Rockland County, New York
Acquisition of color infrared aerial photography to identify mosquito-breeding
areas in conjunction with a study of the West Nile virus in Rockland
County.
Enhanced 911 Data Collection
Maine Office of GIS, Augusta, Maine
GPS collection of road centerline data and point data for structures
and driveways, data post-processing, and editing to implement Enhanced
911 systems in 158 towns throughout the State of Maine.
ENERGY
AND TELECOMMUNICATIONS
AM/FM/GIS
Development and Implementation Consulting
Montana-Dakota Utilities Co., Bismarck, North Dakota
AM/FM/GIS
consulting for the selection, development, and implementation of
enterprise
system, from process review and business case development to user
software development and training.
Leak
Detection Survey Automation
Colonial Gas Company, Lowell, Massachusetts.
Development and implementation of Walking Surveyor Assistant™,
a software tool that automates leak detection surveys in the field.
Utility Mapping and ArcIMS Development
Maine Natural Gas, Brunswick, Maine
Ongoing photogrammetric mapping, orthophotography development, facilities
data conversion, and systems development. Migration of existing
web site to ArcIMS, hosted on Sewall web server.
Utility Mapping
Northeast Utilities Services Company, Waterbury, Connecticut
Ongoing aerial photography, survey control, and photogrammetric
mapping project for portions of 40 municipalities in the State of
Connecticut.
Data Conversion
and GIS Development
PPL Interstate Energy Company, Pottsdown, Pennsylvania
Corridor mapping, digital orthophotography production, and facilities
data conversion for GIS integration, utilizing Sewall's AutoCAD-based
ASGPipeline™ Data Management Module.
Pipeline Software Implementation
Alliance Pipeline Limited, Calgary, Canada
Requirements analysis and implementation of Sewall pipeline software
for automated alignment sheet generation, class location analysis,
and MAOP calculation, in a corporate-wide FRAMME AM/FM system.
GIS Data
Consulting
Kleinschmidt Associates, Pittsfield, Maine
Mapping and
GIS digital data technical assistance for the New York Power Authority
St. Lawrence-FDR Power Project Relicensing effort.
NATURAL
RESOURCES
GIS Data Conversion
Washington State Department of Natural Resources, Olympia, Washington
GIS conversion project on hydrography data for the entire State
of Washington.
Maine Ice
Storm Coverage
Maine Forest Service, Augusta, Maine
Aerial
photography and mapping of 1998 ice storm damage in Maine.
Australian
Timberland Appraisal
Hancock Timber Resource Group
Joint venture with international forestry consulting firm Jaakko
Pöyry Consulting to appraise timberlands in eastern Australia.
Vegetative
Trends Assessment
Friends of Merrymeeting Bay, Bowdoinham, Maine
Photo interpretation,
mapping and land use trends assessment for NWI wetlands and structures
for Merrymeeting Bay and surrounding half-mile buffer.
Eelgrass
Aerial Photography
Maine Department of Environmental Protection, West Boothbay, Maine
Acquisition of true-color aerial photography along specific locations
of the Maine coast for the location of eelgrass beds.
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