Function to get a geometry validation report: The report informs on the following:
type eventual rgeos issue
valid geometry validity status (according to OGC specifications)
issue_type type of geometry issue
error_msg catched message when error raised about geometry
warning_msg catched message when warning raised about geometry
clgeo_GeometryReport(spgeom)object extending the Spatial-class as defined in sp
an object of class list giving the following:
type eventual rgeos issue
valid geometry validity status (according to OGC specifications)
issue_type type of geometry issue
error_msg catched message when error raised about geometry
warning_msg catched message when warning raised about geometry