Ollivier & Company zWhat is a property? zWhat isn’t a property? zLandonline databases zExamples and discussion

zParcels? 2,308,194 zTitle? 3,352,999 zAssessment? ~2.33 M zOwner? 4,873,324 zAddress? 1,467,005 zProperty ID? Is it defined by: What is a property?

What is not a property? zVested roads zStatutory reserves zCrown land zSeabed, lake and riverbed zUnknown appellation zUntitled land

Parcel as a property key? z Original purpose… z Ambiguous appellation z Unit plans not mapped z Multiple parcels for large properties z Undivided shares z Parcels do not have an address

Title as a property key? z Rating Act unit (almost) z Not all parcels “titled” z Boundaries not mapped z Unit titles not locatable z Not in valuation roll z Properties can have multiple titles z Multi-title asssessments

Assessment as property key? z Spatially based rolls z Not all properties assessed z Part properties in different assessment z Unrateable properties ignored z No formal link to parcels LOT 1 DP LOT 1 DP LOTS 1 2 DP LOT 1 DP ALLOTS M61 S61 SM61 NE61 S PT ALLOTS M42 S42 AHUROA PSH ALLOT 134A PT ALLOTSM158 N A 165B E165 W MA HURANGI PSH ALLOTS SW KOURAWHERO PSH ALLOTS NE45 SW PT ALLOT 53 ALLOTS SO ALLOT 422 SO HOTEO PSH BLKS I II V VI X XI MAHURANGI SD BLK VII TAUHOA SD-TN A-ALLOTS HOTEO PSH PT SUBJ TO OIL & GAS ESMT ONSO & SO ALLOT 93 HOTEO PSH ALLOT S E21 21A E22 W22 PT ALLOTS E20 W31 N32 KOURAWHERO PSH PT ALLOT 93 KOURAWHERO PSH-SUBJ TO WATER SUPP LY ESMT

Address as a property key? z Well known to owners z No property address (~10%) z Road names, numbers change z Alternate addresses occur z No defined format z Confused with postal z Addresses are reused z Only a linear reference z “Parcels do not have…”

Owner as a property key? z Customer focus (!) z Multiple owners z Owners own multiple properties (HCNZ) z Owners change but title/parcel does not z Corporate owners z Owner not Occupier

Property-ID as a property key? z Internal unique key z No external reference z Not a legal reference z Financial account bias z Manual maintenance of foreign keys z Inadequate data model for GIS

Ideal Property Architecture z Fully integrated with GIS z Spatial property model z Direct editing of property attributes with graphics z Integrated web access to attributes and maps

In practice councils have separate applications Constraints with dual databases z Version upgrades z Common business rules z Replication for performance and simplified security z Synchronisation issues & editing

GIS - LIS zLocation of all properties zBoundary definitions zRelations for many-to-many zSupport council activities zConsents are on parcels zA map-in-the-app zhttp server for accessibility

Parcel ppr Owners Estate Stat Acts lgp afp sap ets Valuation Appellation Plan ct Relation Table Corax match X Landonline Simplified National Database Property Relationships Legality DVR Rates Title Survey Road Cl Address Titles Maori, Other UnitsProperty?

z CRS - digital cadastre z Replaces paper survey plans z High urban accuracy z Linked to Titles & Owners z Surveyors have online access z BDE - bulk supply for others z Coordinates in lat/long-160 z NZGD 2000 datum Landonline is the survey database

Incremental updates (yet) Links from parcels to road names or addresses Address ranges on centrelines LINZ Core Records System does not have : Links to district valuation rolls Mailing addresses Occupier or ratepayer names

z Survey plans and dates z Titles and dates z Address points z Road centreline names z Strata titles and Unit Plans z Title Owner names z Survey accuracy codes LINZ Core Records System does have : Authoritative title, survey and ownership

Corax z Data supply - not an application or design z Supplied as cleaned topological features z Plus related tables to support better model z Source BDE is very large, 24 Gigabytes

Cadastral Parcels Everything is a Parcel

z Coordinate upgrading 3,646,142 new end markers (emf) 1,206,211 NZGD2000 survey marks 2,308,194 parcels total 40% of parcels in NZ will be exact

z Label ready fields z Feature codes z EMF points z Separated parcel layers z Separated transport layers z Parcel polygons and lines z Geocoded titles and owners z Open format Extra processing in Corax provides :

zFurther information: zLINZ Introduction to bulk data v 7 (pdf) zLINZ data dictionary (pdf) zCorax_intro.htm on CDROM zSample projects ArcView 3, ArcMap