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James W. Sewall


Water infrastructure Covertype Parcel

Geospatial Mapping

Mapping is a Sewall core competency, and high-quality data differentiates Sewall in the marketplace. Our GIS and mapping specialists are experienced in developing and maintaining the following data sets to meet the specific needs of our clients:

  • Planimetric, topographic, volumetric
  • Parcel
  • Cemetery
  • Utilities infrastructure
  • Wastewater and storm water
  • Corridor, ROWs, and boundary
  • Road centerlines and address geocoding
  • Land use and land cover
  • Damage assessment (hurricane, flooding, ice storm, oil spill)
Ortho with parcel overlay

More Info

Remote sensing solutions (PDF)

Covertype mapping services (PDF)

Emergency Planning (PDF)

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Mary McDonald, LPF
Geospatial Solutions
Project Manager
207 817 5446



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