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...]

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...]