The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part B6b. Beijing 2008 
8. INSTRUMENTATION 
For this study, landsat system was used with three different 
sensors representing the three epochs for the study 
Landsat ETM+ 2001-11-03 
Landsat TM 1986-11-15 
Landsat MSS 1972-11-07 
9. RESULT AND DISCUSSION 
Land 
Land FI 
Categories 
1972- 
1986 
1986-2001 
Annual Rate of Change 
Crea 
Ffa.) 
% 
Change 
Area 
(Ha.) 
% 
Change 
72-86 
86 - 2001 
Farm Land 
-16410.699 
-17 
61019216 
7 
14068.4949 
1.05 
Waste Land 
14124.3777 
16 
-5243886 
-7 
50317.263 
-1.05 
Built-ip Land 
7504.5402 
8 
1113.1074 
1 
10815.921 
0.15 
Forest Land 
4518.3838 
10 
-1432809 
-1 
19960.2315 
-0.15 
WteBody 
16874.6562 
-17 
-539.334 
0 
787.5576 
0 
Landuse/ 
1972 
1986 
2001 
Land Covet 
Categories 
AREA 
(Ha.) 
ARE, 
(%) 
AREA 
(Ha.) 
ARE 
(%) 
AREA 
(Ha.) 
ARI 
(%) 
Farm Land 
2437.63 
25 
7965.57 
8 
14068.5 
15 
Waste Land 
41436.7' 
43 
55561.L 
59 
50317.2 
52 
Built-up Lai 
2198.27 
2 
9702.8 L 
100 
10815.9 
11 
Forest Land 
11036.4Ç 
12 
21393.0' 
22 
19960.2 
21 
Water Body 
16874.6( 
18 
1326.89 
1 
787.56 
1 
TOTAL 
95949.4' 
100 
95949.4' 
100 
95949.4 
100 
Table 2 Land use land cover change of Ilorin and its 
1972, 1986 and 2001 
environs: 
Table 1 Static land use land cover distribution of Ilorin and 
environs in 1972, 1986 and 2001 
Built-up which is the focus of this study occupies the least class 
with just 2% of the total classes in 1972. This may not be 
unconnected to the fact that the town (Ilorin) was made the state 
capital in 1967 which is just five years old from the date of 
creation to the date the image was taken. Fig 1 
It is important to state again that settlement or built up as used 
here remains the focus of this study and as such no particular 
attention was given to the accuracy of the other classes 
LAND USE LAND COVER MAP OF ILORJN IN 1972 
As indicated in the table above, built up land which denotes 
settlement has grown by 8%. This may not be unconnected to 
the fact that many projects were embarked on after the creation 
of Kwara State which also falls within the oil boom era of the 
1970s and this attracted a lot of people to the area thus 
contributing to the physical expansion of the city as evident in 
the increased land consumption rate from 0.005 to 0.02 and 
land absorption coefficient by 0.09 between 1972 and 1986 as 
shown in table 3 below. Many of these projects include the 
Army barracks at Sobi, Adewole Housing Estate, the 
International Airport, Niger River Basin Authority 
Headquarters, University of Ilorin among many others which all 
encouraged migration into the city. 
The period between 1986 and 2001 witnessed a drop in the rate 
at which the physical expansion of the city was going as against 
1972 and 1986. For instance, the built-up land only increased 
by 1% as against the 8% increase between 1972 and 1986. This 
is also evident in the drop observed in the land absorption 
coefficient from 0.09 between 1972 and 1986. In deed, the 
austerity measure known as (SAP) introduced into the country 
at this period to restore the country’s economy could be a major 
factor to what was witnessed at this period. 
Year 
Land 
Consumptioi 
Rate 
Year 
Land Absorption 
Coefficient 
1972 
0.005 
1972/86 
0.09 
1986 
0.02 
86/2001 
0.005 
2001 
0.01 
Table 3 Land Consumption Rate and Absorption Coefficient 
LEGEND 
n NO CLASS 
1 FARM LAND 
■¡WASTELAND 
- BUILT UP LAND 
H FOREST LAND 
H WATER BODY 
Year 
Population Figure 
Source 
1977 
400,000 
Eplan Group 1977 
1984 
480,000 
Oyegun 1986 
2001 
689,700 
Researcher’s Estimate 
Table 4 Population figure of Ilorin in 1977, 1984 and 2001