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Methodology and Spatial Analysis
   
                           
             

Cartographic Model of Project

       
 
Files included in analysis:
BIKETRAIL_FUZ.RST
PETSHOPS_FUZ.RST
VETS_FUZ.RST
DAYCARE_FUZ.RST
FAMILYIN_ASS.RST
PARKS_ASS.RST
LANDUSE_ASS.RST
POPDEN_ASS.RST
LANDUSE_BOO.RST
     
             
   

FACTORS

biketrail_fuz.rst - Is a raster file created from importing 3 shapefiles directly into IDRISI. [See Cartographic Model of the combining process]. Because there were no combined files on Vancouver, Burnaby, and Richmond's bike trails I had to create one myself by importing the individual vector layers into IDRISI to be directly converted to raster files - then RECLASS module ( 0 -9999 1 ; 1 1 9999) to rid all negative values - then ADD (vantrail_re + richtrail_re = vrtrail ) then ADD ( vrtrail_add + bbytrail_re = biketrail.rst) to create a biketrail RECLASSED file that is ready for further spatial manipulation. DISTANCE is then added (to calculate distances from trails) and then FUZZY sets are included [see chart below]

petshops_fuz.rst - Is a raster file created from digitizing and then converting from feature to raster format - and from raster to ASC II to be imported into IDRISI. The other way to add vector points it to directly import then as shapefiles to IDRISI. RECLASS module ( 0 -9999 1 ; 1 1 9999) to rid all negative values.

DISTANCE module followed to calculate distances from points to the remaining cells in the raster image and then FUZZY sets are included [see chart below]

vets_fuz.rst - Is a raster file created from digitizing and then converting from feature to raster format - and from raster to ASC II to be imported into IDRISI. RECLASS module ( 0 -9999 1 ; 1 1 9999) to rid all negative values. DISTANCE module followed to calculate distances from points to the remaining cells in the raster image and then FUZZY sets are included [see chart below]

daycare_fuz.rst - Is a raster file created from digitizing and then converting from feature to raster format - and from raster to ASC II to be imported into IDRISI. RECLASS module ( 0 -9999 1 ; 1 1 9999) to rid all negative values. DISTANCE module followed to calculate distances from points to the remaining cells in the raster image and then FUZZY sets are included [see chart below]

Raster File Factor Membership Function Type Membership Function Shape Control Points New Raster Layer
biketrail_dis Sigmoidal Monotonically Decreasing a=100; b=100, c=100, d=500 biketrail_fuz
petshop_dis Linear Monotonically Increasing a=0, b=250, c=250, d=250 petshop_fuz
vets_dis Linear Monotonically Decreasing a=20, b=20, c=20, d=3000 vets_fuz
daycare_dis Linear Monotonically Increasing a=0, b=1500, c=1500, d=1500 daycare_fuz

familyin_ass.rst - Is a raster file created from converting a vector file to raster - and from raster to ASCII to be readily importable into IDRISI. Only the nessecary columns (FAAVGIN) from the census2001.dbf were converted to raster format be analyzed. RECLASS module (0 -9999 1 ; 1 1 50000 ; 2 50000 100000 ; 3 100000 999999) to rid all negative values was performed. ASSIGN module 0 0 ; 1 75 ; 2 225 ; 3 255) avl file was created to rank the family incomes from values between 0 - 255.

parks_ass.rst - Is a raster file created from landuse.rst by RECLASS module where (0 0 1 ; 1 1 2 ; 0 2 9999). Then BUFFER module where [see table] and ASSIGN module (1 0 ; 2 255 ; 3 0) to assign relative importance of areas within buffer zone and areas outside.

Values for target area = 1
Values for buffer zone = 2
Values outside buffer zone = 3
Buffer distance = 500 metres

landuse_ass.rst - Is a raster file created from landuse.rst by first using the ASSIGN module to weight each landuse category from 0-255.

1 0   8 225
2 0 9 0
3 0 10 125
4 100 11 255
5 0 12 0
6 0   13 0
7 225

popden_ass.rst - Is a raster file created from converting a vector file in ArcMap. Population Density was calculated in ArcMap by [Total Population/Area] with the census2001.dbf file. New values were then RECLASS (0 -9999 1 ; 1 1 25 ; 2 25 50 ; 3 50 9999) then ASSIGN from 0 -255 (0 0 ; 1 75 ; 2 220 ; 3 255) with an avl file in IDRISI.

 

CONSTRAINTS

Landuse_boo.rst - A raster file created by converting it from a vector based file. Numerical values of 0 or 1 were ASSIGN to the corresponding landuse types to create a Boolean image used in the Multi-Criteria Evaluation. See constraints listings on DATA COLLECTION page.

0 0   8 1
1 0 9 0
2 0 10 1
4 1 11 1
5 0 12 0
6 0   13 0
7 1

 

 
           
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