The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part B6b. Beijing 2008 
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LAND USE LAND COVER MAP OF ILORIN IN 1986 
Figure 2 
An important aspect of change detection is to determine the 
quantity of change. This information will serve as a vital tool in 
management decisions. This process involves a pixel to pixel 
comparison of the study year images through overlay. 
In terms of location of change, the emphasis is on built-up land. 
Fig 4 shows this change between 1972 and 1986. The 
observation here is that there seem to exist a growth away from 
the city centre following the concentric theory of city growth in 
the literatures. Although the pattern seems to be uniform, there 
exist more growth towards the south western part of the city 
comprising of the Asa dam area, Adewole Estate and Airport. 
Between 1986 and 2001 as shown in Fig 6, there exist drastic 
reductions in the spatial expansion of the city. The only 
noticeable growths are on the edges of the developed areas of 
1986 built-up land. For the projected change as shown in Fig 5, 
the edges of built-up land seems to have been filled up with 
developments by 2001 leaving the only noticeable 
developments to areas around the city centre. These therefore 
suggest that there might be a high level of compactness in Ilorin 
by 2015. 
Figure 4 Derived from the overlay of 1972 and 1986 land use 
land cover map 
Figure 5 
CVB^LAY OF BÜLT UP LAND TO SHCWTVE LOCATION CF CHANGE IN 1972/06 
OVERLAY OF BUILT UP LAf© TO SHCWTHE LOCATION OF CHANGE IN 86/2001 
LAND USE LAN) OCMER MAP OF ILORIN IN 2001 
Figure 3 
LEGEND 
■ ND CLASS 
r~l FARMLAND 
gg WASTE LAND 
I BULTUPLAND 
M FORESTLAND 
■ WATERBODY 
PROJECTED LAND USE LAND COVER OF ILORIN IN 2015 
LEGEND 
■i NO CLASS 
~ j FARM LAND 
■I WASTELAND 
BUILT UP LAND 
H FORESTLAND 
m WATER BODY 
Figure 6 Derived from the overlay of 1986 and 2001 Land use 
land cover map