Image Processing Reference
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Fig. 12.4 Class Area (CA), Edge Density (ED), and Interspersion and Juxtaposition Index (IJI)
for the aggregated land cover classes (whole investigated area and for urban masked grid cells)
The Water class was not included as it had minimal representation in the grid analysis
area. The Asphalt class exhibits relatively low IJI values in areas associated with urban
mountain parks and along the urban/peri-urban fringe area. Highest values are associ-
ated with older mesic residential areas, while significantly variable IJI is obtained for
the remainder of the urbanized region. Older residential areas in the Phoenix region are
generally comprised of lots with high amounts of vegetation (grass, trees) in addition
to built materials and asphalt roadways (Hope et al. 2003 ).
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