Alias of the default available shapereader interface.

Will either be FionaReader (if fiona installed) or BasicReader (based on PyShp). Note that FionaReader has greater speed and additional functionality, including attempting to auto-detect source encoding and support for different format drivers. Both libraries support the ‘encoding’ and ‘bbox’ keyword arguments. If specific functionality is needed, BasicReader and FionaReader instances can also be created directly.