Property lines mapped as parcel polygons within Langley Township. The data includes the following information: Folio, PID, and civic address of existing parcels Description The Township uses two survey systems. The first was 1859 District Lot system which still describes many properties near the Fraser River. The District Lot system was superseded in 1873 with the New Westminster Township Section system which covers the bulk of the municipality and is used to the present day. The cadastral data set originated as hand drawn township-section maps in imperial scales. The lot lines were compiled from historical community maps, registered legal plans surveyed with astronomic bearings and legal descriptions where no surveys exist.

In the late 1970’s the Township's maps were converted to metric scales and all dimension annotation was converted manually to metric. In 1982 parcels BC GAS manually digitized the hand drawn township-section maps and assembled them into a single continuous cadastral fabric encompassing the entire township. The lot line data was rubber sheeted to fit the higher accuracy mapping of neighbouring municipalities, no interior control points were used. In 1983 Langley Township obtains BC GAS Intergraph format lot line data and translated it into Terrasoft format for the Township's GIS.In 1986 the lot lines were converted to parcel polygons linked to BCAA folio numbers and Tempest. In 1987 map annotation was converted to digital. In 1999 the GIS data was converted from Terrasoft to AutoCAD Map format. In 2000 the digital base was again rubber sheeted with a township wide grid pattern of survey monuments used for control. In 2003 lot links were converted from BCAA folio numbers to Township property numbers. In 2004 GIS data is converted from AutoCAD Map format to Munsys Oracle format. In 2005 Langley Township adopts DIGITAL LEGAL SURVEY PLAN STANDARDS and new cadastral is entered directly from high accuracy UTM projected surveys. In 2009 GIS data was converted from Munsys Oracle format to ESRI ArcSDE format.

These are point locations displayed indicating firehydrant in the Township. Hydrants supply large volume of water to aid fire fighters. Pressure = Pressure at the hydrant in psiPressureZone = Pressure Zone value in metres. Value is m of head at the reservoir or value reduced by pressure reducing valve.Estimated Flow rates units based on Gallons/min