Levels of Use of a GIS
Selected Data About Geographic Locations
Cross-Sectional Research
Stratified Sampling Method
Data Collection by Observations
Longitudinal Research
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Updated: Jan 9, 2026

Sampling Soils in a Heterogeneous Research Plot
Published on: January 7, 2019
Michael Bradfield1, Toluwanimi Olorunnisola2, Vignesh Subbian2
1Department of Family Medicine, Banner Health North Colorado Medical Center, Greeley, Colorado, United States of America.
Rural communities face significant health disparities. This study developed a new rurality scale using 3-digit ZIP codes, revealing links between rurality, delayed care, and healthcare affordability challenges.
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