// note: select the OpenDAP access URL based on THREDDS service type
if (service.getServiceType()==ServiceType.OPENDAP) {
LOG.log(Level.FINE, "Found OpenDAP access URL: "+ single.getUrlPath());
String opendapurl = this.datasetURL + single.getUrlPath();
// extract metadata from THREDDS catalog
MetadataExtractor extractor = new ThreddsMetadataExtractor(dd);
Metadata met = new Metadata();
extractor.extract(met, conf);
// index metadata by opendap access URL
this.datasetMet.put(opendapurl, met);
this.urls.add(opendapurl);
break;
}