Stage 1: Data Collection
and Justification
Most of the spatial data for the Geodatabase originated from the District
of Pitt Meadows, with some of it being provided by the B.C. Provincial
Government. The data was given to OD in the following formats from
the District: Arc/Info, PC Arc/Info coverages, AutoCAD, ArcGIS coverages,
ArcView shapefiles, DBF and Excel spreadsheets. The majority of the
data was originally stored as shapefiles, PC Arc/Info coverages or
e00. Data originating from the Ministry of Agriculture, Fisheries
and Food (i.e. soil and capability data) was compiled. While most
of the data was contained in the District of Pitt Meadows, some attribute
table fields corresponded to areas outside the District.
Discrepancies among identical GIS
themes were carefully observed and corrected where possible (i.e.
OCP_RURAL, OCP_URBAN, Utilities). Cadastre and crops data needed to
be revised due to distortions caused by previous rubber-sheeting processes,
causing mismatches to the original cadastral references. AutoCad files
were not used because they contained feature elements not present
in ArcGIS format, (such as North Arrows, GRID lines and latitude/longitude
values) that would have required manual deletion. Due to time constraints,
OD used AutoCad files strictly for reference purposes.
To facilitate ease in linking or relationships,
roll number values in some feature and attribute layers were formatted
using ArcView 3.2 according to the format in the cadastral feature
layer. Also, zoning codes were added to cadastral feature layer. New
data generated included the zoning definition attribute table and
the parcel lot and plan number annotations through AML scripts. The
AML scripts contributed by Darrin Grund were modified such that the
annotation text sizes increased with increasing parcel area. Furthermore,
since plan numbers are not unique, the AML script created plan numbers
in common areas.
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