The importance of geographic space to minimize the error of representative samples

Authors

  • Ricardo Truffello Robledo Pontificia Universidad Católica de Chile. Instituto de Estudios Urbanos y Territoriales
  • Monica Flores Castillo Pontificia Universidad Católica de Chile. Subdirectora Observatorio de Ciudades UC
  • Matías Garreton Universidad Adolfo Ibáñez (Chile). Profesor Asistente, Design Lab
  • Gonzalo Ruz Universidad Adolfo Ibáñez (Chile).Facultad de Ingeniería y Ciencias. Center of Applied Ecology and Sustainability (CAPES), Santiago, Chile

Keywords:

Regionalization, spatial stratification, spatial sampling

Abstract

This paper discusses the importance of geographic space in the context of generating a sample framework for surveys, questioning the traditional statistical premise of randomness and independence of the number of observations. The contribution of quantitative geography in the generation of regionalization methodologies is analyzed, since these allow the improvement of the sampling error of the surveys, focusing mainly on urban areas, and in the presence of stratification variables with spatial autocorrelation.
Regionalization algorithms with and without heuristic optimization processes are empirically tested, using census data, to subsequently define the level of error and establish comparisons against traditional random and two-stage random sampling, using a Monte Carlo procedure.
The results obtained show a decrease of up to 20% in error against traditional methodologies or alternatively, a reduction of up to 100 cases with the same level of error. It is concluded that spatialized sampling methodologies with heuristic optimization offer advantages in urban areas, in the presence of spatial autocorrelation.

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Author Biographies

Ricardo Truffello Robledo, Pontificia Universidad Católica de Chile. Instituto de Estudios Urbanos y Territoriales

Prodesor asistente adjunto, Instituto de Estudios urbanos y Territoriales, Director Observatorio de Ciudades UC, investigador de CEDEUS

Monica Flores Castillo, Pontificia Universidad Católica de Chile. Subdirectora Observatorio de Ciudades UC

Subdirectora Observatorio de Ciudades UC, Pontificia Universidad Católica de Chile

Matías Garreton, Universidad Adolfo Ibáñez (Chile). Profesor Asistente, Design Lab

Profesor Asistente, Design Lab , Universidad Adolfo Ibáñez, Jefe de Investigación Design Lab, UAI.

Gonzalo Ruz, Universidad Adolfo Ibáñez (Chile).Facultad de Ingeniería y Ciencias. Center of Applied Ecology and Sustainability (CAPES), Santiago, Chile

Profesor Titular, Facultad de Ingeniería y Ciencias, Universidad Adolfo Ibáñez, Santiago, ChileCenter of Applied Ecology and Sustainability (CAPES), Santiago, Chile

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Published

2022-06-23

How to Cite

Truffello Robledo, R., Flores Castillo, M., Garreton, M., & Ruz, G. (2022). The importance of geographic space to minimize the error of representative samples. Revista De Geografía Norte Grande, (81), 137–160. Retrieved from https://rchd.uc.cl/index.php/RGNG/article/view/18249

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