func (this *Geos) IsValid(geom *Geom) bool { if C.GEOSisValid_r(this.v, geom.v) == 1 { return true } return false }
func cGEOSisValid(g1 *C.GEOSGeometry) C.char { handlemu.Lock() defer handlemu.Unlock() return C.GEOSisValid_r(handle, g1) }