#!/usr/bin/python # -*- coding: ISO-8859-15 -*- # ============================================================================= # Copyright (c) 2009 Tom Kralidis # # Authors : Tom Kralidis # # Contact email: tomkralidis@hotmail.com # ============================================================================= """ ISO metadata parser """ import StringIO from owslib.etree import etree from owslib import util # default variables namespaces = { None : 'http://www.isotc211.org/2005/gmd', 'gco': 'http://www.isotc211.org/2005/gco', 'gmd': 'http://www.isotc211.org/2005/gmd', 'gts': 'http://www.isotc211.org/2005/gts', 'srv': 'http://www.isotc211.org/2005/srv', 'xlink': 'http://www.w3.org/1999/xlink' } class MD_Metadata(object): """ Process gmd:MD_Metadata """ def __init__(self, md): val = md.find(util.nspath('fileIdentifier', namespaces['gmd']) + '/' + util.nspath('CharacterString', namespaces['gco'])) self.identifier = util.testXMLValue(val) val = md.find(util.nspath('language', namespaces['gmd']) + '/' + util.nspath('CharacterString', namespaces['gco'])) self.language = util.testXMLValue(val) val = md.find(util.nspath('characterSet/MD_CharacterSetCode', namespaces['gmd'])).attrib.get('codeListValue') self.charset = util.testXMLValue(val, True) val = md.find(util.nspath('hierarchyLevel/MD_ScopeCode', namespaces['gmd'])).attrib.get('codeListValue') self.hierarchy = util.testXMLValue(val, True) val = md.find(util.nspath('contact/CI_ResponsibleParty', namespaces['gmd'])) if val: self.contact = CI_ResponsibleParty(val) else: self.contact = None val = md.find(util.nspath('dateStamp', namespaces['gmd']) + '/' + util.nspath('DateTime', namespaces['gco'])) self.datestamp = util.testXMLValue(val) val = md.find(util.nspath('metadataStandardName', namespaces['gmd']) + '/' + util.nspath('CharacterString', namespaces['gco'])) self.stdname = util.testXMLValue(val) val = md.find(util.nspath('metadataStandardVersion', namespaces['gmd']) + '/' + util.nspath('CharacterString', namespaces['gco'])) self.stdver = util.testXMLValue(val) val = md.find(util.nspath('referenceSystemInfo/MD_ReferenceSystem', namespaces['gmd'])) if val: self.referencesystem = MD_ReferenceSystem(val) else: self.referencesystem = None val = md.find(util.nspath('identificationInfo/MD_DataIdentification', namespaces['gmd'])) val2 = md.find(util.nspath('identificationInfo', namespaces['gmd']) + '/' + util.nspath('SV_ServiceIdentification', namespaces['srv'])) if val: self.identification = MD_DataIdentification(val, 'dataset') elif val2: self.identification = MD_DataIdentification(val2, 'service') self.identification.service = SV_ServiceIdentification(val2) else: self.identification = None val = md.find(util.nspath('distributionInfo/MD_Distribution', namespaces['gmd'])) if val: self.distribution = MD_Distribution(val) else: self.distribution = None class CI_ResponsibleParty(object): """ process CI_ResponsibleParty """ def __init__(self, md): val = md.find(util.nspath('individualName', namespaces['gmd']) + '/' + util.nspath('CharacterString', namespaces['gco'])) self.name = util.testXMLValue(val) val = md.find(util.nspath('organisationName', namespaces['gmd']) + '/' + util.nspath('CharacterString', namespaces['gco'])) self.organization = util.testXMLValue(val) val = md.find(util.nspath('positionName', namespaces['gmd']) + '/' + util.nspath('CharacterString', namespaces['gco'])) self.position = util.testXMLValue(val) val = md.find(util.nspath('contactInfo/CI_Contact/phone/CI_Telephone/voice', namespaces['gmd']) + '/' + util.nspath('CharacterString', namespaces['gco'])) self.phone = util.testXMLValue(val) val = md.find(util.nspath('contactInfo/CI_Contact/phone/CI_Telephone/facsimile', namespaces['gmd']) + '/' + util.nspath('CharacterString', namespaces['gco'])) self.fax = util.testXMLValue(val) val = md.find(util.nspath('contactInfo/CI_Contact/address/CI_Address/deliveryPoint', namespaces['gmd']) + '/' + util.nspath('CharacterString', namespaces['gco'])) self.address = util.testXMLValue(val) val = md.find(util.nspath('contactInfo/CI_Contact/address/CI_Address/city', namespaces['gmd']) + '/' + util.nspath('CharacterString', namespaces['gco'])) self.city = util.testXMLValue(val) val = md.find(util.nspath('contactInfo/CI_Contact/address/CI_Address/administrativeArea', namespaces['gmd']) + '/' + util.nspath('CharacterString', namespaces['gco'])) self.region = util.testXMLValue(val) val = md.find(util.nspath('contactInfo/CI_Contact/address/CI_Address/postalCode', namespaces['gmd']) + '/' + util.nspath('CharacterString', namespaces['gco'])) self.postcode = util.testXMLValue(val) val = md.find(util.nspath('contactInfo/CI_Contact/address/CI_Address/country', namespaces['gmd']) + '/' + util.nspath('CharacterString', namespaces['gco'])) self.country = util.testXMLValue(val) val = md.find(util.nspath('contactInfo/CI_Contact/onlineResource/CI_OnlineResource', namespaces['gmd'])) if val: self.onlineresource = CI_OnlineResource(val) else: self.onlineresource = None val = md.find(util.nspath('role/CI_RoleCode', namespaces['gmd'])).attrib.get('codeListValue') self.role = util.testXMLValue(val, True) class MD_DataIdentification(object): """ process MD_DataIdentification """ def __init__(self, md, identtype): self.identtype = identtype val = md.find(util.nspath('citation/CI_Citation/title', namespaces['gmd']) + '/' + util.nspath('CharacterString', namespaces['gco'])) self.title = util.testXMLValue(val) val = md.find(util.nspath('citation/CI_Citation/date/CI_Date/date', namespaces['gmd']) + '/' + util.nspath('DateTime', namespaces['gco'])) self.date = util.testXMLValue(val) val = md.find(util.nspath('citation/CI_Citation/date/CI_Date/dateType/CI_DateTypeCode', namespaces['gmd'])).attrib.get('codeListValue') self.datetype = util.testXMLValue(val, True) val = md.find(util.nspath('abstract', namespaces['gmd']) + '/' + util.nspath('CharacterString', namespaces['gco'])) self.abstract = util.testXMLValue(val) val = md.find(util.nspath('purpose', namespaces['gmd']) + '/' + util.nspath('CharacterString', namespaces['gco'])) self.purpose = util.testXMLValue(val, True) val = md.find(util.nspath('status/MD_ProgressCode', namespaces['gmd'])).attrib.get('codeListValue') self.status = util.testXMLValue(val, True) val = md.find(util.nspath('pointOfContact/CI_ResponsibleParty', namespaces['gmd'])) if val: self.contact = CI_ResponsibleParty(val) else: self.contact = None self.keywords = {} val = md.find(util.nspath('descriptiveKeywords/MD_Keywords/type/MD_KeywordTypeCode', namespaces['gmd'])).attrib.get('codeListValue') self.keywords['type'] = util.testXMLValue(val, True) self.keywords['list'] = [] for i in md.findall(util.nspath('descriptiveKeywords/MD_Keywords/keyword', namespaces['gmd'])): k = i.find(util.nspath('CharacterString', namespaces['gco'])) self.keywords['list'].append(util.testXMLValue(k)) val = md.find(util.nspath('topicCategory/MD_TopicCategoryCode', namespaces['gmd'])) self.topiccategory = util.testXMLValue(val) val = md.find(util.nspath('extent/EX_Extent', namespaces['gmd'])) if val: self.bbox = EX_Extent(val) else: self.bbox = None class MD_Distribution(object): """ process MD_Distribution """ def __init__(self, md): val = md.find(util.nspath('distributionFormat/MD_Format/name', namespaces['gmd']) + '/' + util.nspath('CharacterString', namespaces['gco'])) self.format = util.testXMLValue(val) val = md.find(util.nspath('distributionFormat/MD_Format/version', namespaces['gmd']) + '/' + util.nspath('CharacterString', namespaces['gco'])) self.version = util.testXMLValue(val) val = md.find(util.nspath('transferOptions/MD_DigitalTransferOptions/onLine/CI_OnlineResource', namespaces['gmd'])) if val: self.onlineresource = CI_OnlineResource(val) else: self.onlineresource = None class SV_ServiceIdentification(object): """ process SV_ServiceIdentification """ def __init__(self, md): val = md.find(util.nspath('serviceType', namespaces['srv']) + '/' + util.nspath('LocalName', namespaces['gco'])) self.type = util.testXMLValue(val) val = md.find(util.nspath('serviceTypeVersion', namespaces['srv']) + '/' + util.nspath('CharacterString', namespaces['gco'])) self.version = util.testXMLValue(val) val = md.find(util.nspath('accessProperties', namespaces['srv']) + '/' + util.nspath('MD_StandardOrderProcess/fees', namespaces['gmd']) + '/' + util.nspath('CharacterString', namespaces['gco'])) self.fees = util.testXMLValue(val) val = md.find(util.nspath('extent', namespaces['srv']) + '/' + util.nspath('EX_Extent', namespaces['gmd'])) if val: self.bbox = EX_Extent(val) else: self.bbox = None val = md.find(util.nspath('couplingType/SV_CouplingType', namespaces['srv'])).attrib.get('codeListValue') self.couplingtype = util.testXMLValue(val, True) self.operations = [] for i in md.findall(util.nspath('containsOperations', namespaces['srv'])): tmp = {} val = i.find(util.nspath('SV_OperationMetadata/operationName', namespaces['srv']) + '/' + util.nspath('CharacterString', namespaces['gco'])) tmp['name'] = util.testXMLValue(val) tmp['dcplist'] = [] for d in i.findall(util.nspath('SV_OperationMetadata/DCP', namespaces['srv'])): tmp2 = d.find(util.nspath('DCPList', namespaces['srv'])).attrib.get('codeListValue') tmp['dcplist'].append(util.testXMLValue(tmp2, True)) tmp['connectpoint'] = [] for d in i.findall(util.nspath('SV_OperationMetadata/connectPoint', namespaces['srv'])): tmp3 = d.find(util.nspath('CI_OnlineResource', namespaces['gmd'])) tmp['connectpoint'].append(CI_OnlineResource(tmp3)) self.operations.append(tmp) self.operateson = [] for i in md.findall(util.nspath('operatesOn', namespaces['srv'])): tmp = {} tmp['uuidref'] = i.attrib.get('uuidref') tmp['href'] = i.attrib.get(util.nspath('href', namespaces['xlink'])) tmp['title'] = i.attrib.get(util.nspath('title', namespaces['xlink'])) self.operateson.append(tmp) class CI_OnlineResource(object): """ process CI_OnlineResource """ def __init__(self,md): val = md.find(util.nspath('linkage/URL', namespaces['gmd'])) self.url = util.testXMLValue(val) val = md.find(util.nspath('protocol', namespaces['gmd']) + '/' + util.nspath('CharacterString', namespaces['gco'])) self.protocol = util.testXMLValue(val) val = md.find(util.nspath('name', namespaces['gmd']) + '/' + util.nspath('CharacterString', namespaces['gco'])) self.name = util.testXMLValue(val) val = md.find(util.nspath('description', namespaces['gmd']) + '/' + util.nspath('CharacterString', namespaces['gco'])) self.description = util.testXMLValue(val) val = md.find(util.nspath('function', namespaces['gmd'])) if val: self.function = val.find(util.nspath('CI_OnLineFunctionCode', namespaces['gmd'])).attrib.get('codeListValue') else: self.function = None class EX_Extent(object): """ process EX_Extent """ def __init__(self, md): val = md.find(util.nspath('geographicElement/EX_GeographicBoundingBox/westBoundLongitude', namespaces['gmd']) + '/' + util.nspath('Decimal', namespaces['gco'])) self.minx = util.testXMLValue(val) val = md.find(util.nspath('geographicElement/EX_GeographicBoundingBox/eastBoundLongitude', namespaces['gmd']) + '/' + util.nspath('Decimal', namespaces['gco'])) self.maxx = util.testXMLValue(val) val = md.find(util.nspath('geographicElement/EX_GeographicBoundingBox/southBoundLatitude', namespaces['gmd']) + '/' + util.nspath('Decimal', namespaces['gco'])) self.miny = util.testXMLValue(val) val = md.find(util.nspath('geographicElement/EX_GeographicBoundingBox/northBoundLatitude', namespaces['gmd']) + '/' + util.nspath('Decimal', namespaces['gco'])) self.maxy = util.testXMLValue(val) class MD_ReferenceSystem(object): """ process MD_ReferenceSystem """ def __init__(self, md): val = md.find(util.nspath('referenceSystemIdentifier/RS_Identifier/code', namespaces['gmd']) + '/' + util.nspath('CharacterString', namespaces['gco'])) self.code = util.testXMLValue(val)