Articles by Lee Hachadoorian

Load PostGIS geometries in R without rgdal

January 14, 2014 | Lee Hachadoorian

As I said in my last post, rgdal lacks some of the features of GDAL, including the ability to subset columns and rows the source layer, and I demonstrated a workaround. The workaround relied upon the RPostgreSQL package, and this raises a question: Is it possible to transfer geographic data ... [Read more...]

Subsetting in readOGR

December 31, 2013 | Lee Hachadoorian

The function readOGR in the rgdal package is used to bring vector spatial data sources into R. readOGR() relies upon OGR (part of the GDAL/OGR library) for format conversion. Unfortunately, while OGR supports the ability to subset columns (with the -select switch) or rows (with the -where switch), or ... [Read more...]

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