Data Preparation and Manipulation
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Study Design
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Methodological and Operational Errors
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References

    Where in the GVRD is the most suitable location to put a new skate park? This is the question that the multi-criteria evaluation intends to answer. The project design for this multi-criteria evaluation is evident in the cartographic model created for this location analysis project. The cartographic model can be seen below.

Cartographic Model: The yellow colored rectangles symbolize an attribute values file. The violet coloured rectangles symbolize a raster image. The lime green coloured rectangles symbolize a vector image. The peach coloured polygons symbolize an Idrisi module.

    The gvrd_landuse3 image and the parks definition attribute values file was used as inputs in the assign module to create a boolean image of only the recreation and protected natural areas land use category. The initial module, using the define individually option, in order to have all of the parameters, like number of rows and columns, of the gvrd_landuse3 image present in the images to follow.   

    In the process of creating the proximity to transit criteria, there were a few steps along the way. The pointras module was added, using the record the identifiers option, to the bus stop vector image to turn it into a raster image. The lineras module was added to the skytrain_line vector image to turn it into a raster images. The raster_bus stop image and the raster_skytrain image needed to be reclassed, because each of the line segments in the raster_skytrain image and each of the individual bus stops in the raster_bus stop image was shown in the image based on their object identification number. These two raster image for the multi-criteria evaluation needed to become a boolean image so all of the individual line segments and bus stops needed to become one in the image. To view the resulting transit image click here.

    In the process of creating the distance from railways criteria, there were a few steps along the way. The lineras module was added to the railways vector images to turn them into raster images. Similar to the above problem with the SkyTrain and bus stop data, the raster_railways image needed to be reclassed, because each of the line segments was shown in the image based on their object identification number. The image for the multi-criteria evaluation needed to become a boolean image so all of the individual railway segments needed to become one in the image. To view the resulting railway image click here.

     In order to have the two population density of males factor images ready for the multi-criteria evaluation they first needed to be reclassed to get rid of the -9999 values (null values).
    All of the data needed to be in a common projected coordinate system, which was conducted in the ArcGIS software program. Nad 1983 UTM Zone 10N was chosen as the common projection for all of the shapefiles because it is a good projection for the size of the GVRD. The GVRD land use data stated in its accompanying text file that the data was used in UTM Zone 10N and a datum of Nad 1983, but this data still needed to be projected, which it was. The TransLink data and the Census 2001 spatial data also needed to be projected into Nad 1983 UTM Zone 10N. The railway data was already projected.

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