Local Street Gazetteer - Health Check - Iahub.net

To ensure complete coverage and synchronicity in both datasets therelevant records should be added to the LSG taking care to ensure that thesame USRN is used and street names (and other details where possible) areidentical in bothNC7 This displays streets where the USRN exists in the NSG but not in theNLPG.NC7a displays Open Type 1 streets that are not in the NLPGNC7b displays Open Type 2 streets that are not in the NLPGNC7c displays Open Type 3 and 4 streets that are not in the NLPG To ensure complete coverage and synchronicity in both datasets therelevant records should be added to the LLPG taking care to ensure that thesame USRN is used and street names (and other details where possible) areidentical in both.NC8 This displays instances where the same unique street descriptor(street name, locality, town and authority code) appear in both datasets buton different USRNs. This is a sign that the gazetteers have diverged. This should be resolved by discussion between the LSG and LLPGcustodians and GeoPlace if desired.NC9 This displays instances where the NLPG contains an open Type 9street. Type 9 streets are not used in the NSG. They are only used in theNLPG to accommodate unusual addressing situations. They typicallyencompass examples such as rivers, waterways and railways.You may wish to review these records and provide guidance to the LLPGCustodian where the Type 9 street is a potential duplicate of an existing Type1, 2, or 4 street record.NC10 This displays instances where the NLPG contains a closed Type 9street. Type 9 streets are not used in the NSG. They are only used in theNLPG to accommodate unusual addressing situations. They typicallyencompass examples such as rivers, waterways and railways.You may wish to review these records and provide guidance to the LLPGCustodian where the Type 9 street is a potential duplicate of an existing Type1, 2, or 4 street record.National Street Gazetteer and ASD – Health Check SpecificationV2.1 January 2012Page 37 of 40