Noting that Khartoum represents the most rapidly expanding
city in the Sudan and taking into account that change detection
operations are seldom , the present study has been initiated to
attempt to produce work that synthesizes land use/land cover (LULC)
to investigate change detection using GIS, remote sensing data and
digital image processing techniques; estimate, evaluate and map
changes that took place in the city from 1975 to 2003. The experiment
used the techniques of visual inspection, write-function-memoryinsertion, image differencing, image transformation i.e. normalized
difference vegetation index (NDVI), tasseled cap, principal
component analysis (PCA), post-classification comparison and GIS.
The results of all these various techniques were used by the authors to
study change detection of the geographic locale of the test area. Image
processing and GIS techniques were performed using Intergraph
Image analyst 8.4 and GeoMedia professional version 6, ERDAS
Imagine 8.7, and ArcGIS 9.2. Results obtained were discussed and
analyzed in a comparative manner and a conclusion regarding the best
method for change detection of the test area was derived.