dbfaddfield dbffileisnull dbfgetfieldindex dbfgetfieldinfo dbfgetnativefieldtype dbfisattributenull ftdouble ftinteger ftinvalid ftlogical ftstring shpclose shpcomputeextents shpcreate shpcreateobject shpcreatesimpleobject shpdestroyobject shpfileisnull shpgetinfo shpisnull shpopen shpreadobject shpt_arc shpt_arcm shpt_arcz shpt_multipatch shpt_multipoint shpt_multipointm shpt_multipointz shpt_null shpt_point shpt_pointm shpt_pointz shpt_polygon shpt_polygonm shpt_polygonz shpwriteobject

logical function, public shapelib::shpisnull ( type(shpobject), intent(in)  psobject ) It returns .TRUE. if the provided shape object is not valid. It can be called after shpreadobject to test whether a valid shape has ben read. Parameters [in] psobject shape object to test Definition at line 559 of file shapelib.F90.