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 TNTgis 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
