def insert(self, krw_measures):
        """Insert new measures."""
        count = 0
        for krw_measure in krw_measures:
            matident = krw_measure.identificatie.matident
            measure = Measure.objects.filter(ident=matident)
            if measure.exists():
                logger.warning("MATIDENT {} exists.".format(matident))
                continue
            try:
                logger.debug("insert measure {}.".format(matident))
                measure = Measure(**krw_measure.measureAsDict())
                measure.save()
                measure.categories = krw_measure.krwcategories
                measure.areas = krw_measure.geldenVoorWaterbeheerGebied.modelAreas
                measure.waterbodies = krw_measure.geldenVoorWaterbeheerGebied.modelWaterBodies
                measure.save()
                count += 1
            except:
                logger.exception("Cannot insert measure {}.".format(matident))

        logger.info("Parsed measures {}.".format(len(krw_measures)))
        logger.info("Inserted measures {}.".format(count))