Spatial Analysis

Creating the constraint maps:

Constraint #1 - must be at least 50 m from a dwelling
. vector maps for buildings and builtup areas were converted to raster files.
. a boolean map was made using RECLASS identifying areas with development
. a buffer of 50m was created around all developed areas.

The Boolean map showing developed areas in purple.

The developed areas with a 50m buffer created around them.

The final Boolean map of the buffered developed areas, shown in purple.

Constraint #2 - must not run through an existing provincial park or developed recreational area
. a vector map for developed recreational areas was converted to a raster file.
. a boolean map was made using RECLASS identifying recreational areas
. the vector file of BC parks was converted to a raster file
. a boolean map was made using RECLASS identifying provincial parks

Constraint #3 - must not run through private property or leased land
. this was combined with constraint #1, see above for details.

Constraint #4  - can not go over a waterbody.
. the vector map for waterbodies was converted to a raster file.
. a boolean map was made using RECLASS identifying areas of substantial water i.e. ocean and lakes.

Boolean map identifying waterbodies in purple.

. One by one each constraint boolean map was overlayed with each other using the cover (logical or) operation.
. The result was a boolean map indicating areas where a road could not go in yellow and areas suitable for a road in black.

Boolean map of all the constraints overlayed, identifying areas where a road cannot be built in yellow.

Creating the factor maps:

See problems for details concerning the factor maps.