Maintenance

Detailed attribute comparison for OSMM Highways Network's Maintenance Feature Type with the equivalent OS NGD feature types.

In OS NGD, all features have geometry and have been split into three separate feature types depending on their geometry type:

• Maintenance Area

• Maintenance Line

• Maintenance Point

The OS NGD attribute links below all point to the Maintenance Area Feature Type; however, the structure and attribution of all three feature types is identical, with the exception of the geometry measures, i.e. geometry_area and geometry_length attributes on the Area and Line Feature Types, respectively.

OSMM Attribute	OSMM Code List (if Applicable)	OS NGD Attribute	OS NGD Code List (if Applicable)	Notes
networkRef > element	N/A	usrn	N/A	Attribute serves the same purpose.
networkRef > LocationDescription	N/A	locationdescription	N/A	Attribute serves the same purpose.
networkRef > LocationStart	N/A	geometry	N/A	Information is now provided as geometry rather than attribution.
networkRef > LocationEnd	N/A	geometry	N/A	Information is now provided as geometry rather than attribution.
networkRef > LocationLine	N/A	geometry	N/A	Information is now provided as geometry rather than attribution.
networkRef > LocationArea	N/A	geometry	N/A	Information is now provided as geometry rather than attribution.
maintenanceResponsibility	MaintenanceValue	maintenanceresponsibility	maintenancevalue	Attribute serves the same purpose.
maintenanceAuthority > identifier	N/A	maintenanceauthority_identifier	N/A	Attribute serves the same purpose.
maintenanceAuthority > AuthorityName	N/A	maintenanceauthority_authorityname	N/A	Attribute serves the same purpose.
partialReference	N/A	partialreference	N/A	Attribute serves the same purpose.
highwayAuthority > identifier	N/A	highwayauthority_identifier	N/A	Attribute serves the same purpose.
highwayAuthority > AuthorityName	N/A	highwayauthority_authorityname	N/A	Attribute serves the same purpose.

All the OSMM Highways Network products' attributes above use the names from the GML format; please see the Attribute naming differences between GML and GeoPackage formats page for the GeoPackage equivalents.