Only one layer in a shapefile?

[chrisnatali]

Not sure why io iterates over layers here. There should only be one in a shapefile.

The GDAL interface generically handles sources with multiple layers, but I don't believe shapefiles are one of these.

[chrisnatali]

From here:

"Normally the OGR Shapefile driver treats a whole directory of shapefiles as a dataset, and a single shapefile within that directory as a layer. In this case the directory name should be used as the dataset name. However, it is also possible to use one of the files (.shp, .shx or .dbf) in a shapefile set as the dataset name, and then it will be treated as a dataset with one layer."