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CEREO shapefiles

Mapping with Shapefiles and Thiessen polygon generation

Today Tung Nguyen presented some advanced mapping techniques. Today’s presentation used the following packages and a function from Stackoverflow ( He also used the attached shapefiles: r_base_shapefile

Packages: “deldir”, “rgdal”, “sp”, “rgeos”, “maptools”, “gstat”, “mapview”, “ggplot2”, “ggmap”, “viridis”, “dplyr”

Tung showed us how he created polygons for individual catchments basins and then apply those polygons to a google maps basemap. In addition, we used ggplot2 to create differently sized symbols representing mean catchment size.

Script: more-mapping-thiessen-polygons-and-google-basemaps