Geographic Data Structuring Polygon Vectorizing James Sewall Co., Maine, U.S.A. click to enlarge This involved the scanning, vectorizing, labelling, topological processing, and plotting of forestry polygons in the State of Maine. Topological Structuring and Maintenance of N.B. Digital Topographic Database. Service New Brunswick, Canada This involved writing the specifications for production contracts worth approximately $1,000,000 for the New Brunswick Digital Topographic Database. Topological Structuring of Topographic Data Service New Brunswick, Canada This involved the topological structuring and extensive quality control, of digital topographic data in the Province of New Brunswick.