title: Smooth pycnophylactic interpolation for geographical regions.
authors.forename: W R
authors.initials: WR
authors.lastname: Tobler
mesh_terms: D000569:Americas; D003710:Demography; D019049:Developed Countries; D005843:Geography; D009656:North America; D011153:Population; D014481:United States
keywords: Americas; Developed Countries; Geographic Factors; North America; Northern America; Population; Spatial Distribution; United States