Digitizing Soil Maps

How do you computerize paper maps? This booklet walks you through a sample project that digitizes published soil maps by using several TNT processes to scan, threshold, vectorize, combine, and finish a digital map containing vector polygons with attached geoattributes. The techniques can be generalized for other types of paper maps.

scanning techniques

auto-trace process

apply binary threshold

remove dangles / overshoots

select thinning method

mosaic multiple sheets

add georeference

preview filter results

close gaps

remove islands / bubbles

clean artifacts

import / attach geoattributes

Digitizing Soil Maps. (file date: 23 Mar 06)

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