I am a student in GIS I have a dissertation about land use change. I have questions about using ArcMap 10 for this aim, how can using GIS to detect the percentage of land use change. For example we want to identify land use change in Sheffield city between 1990 until 2000 Land use of Urban %30 1990 also it is changed to %40 in 2000 how can detect this result I mean (%30 and %40).
there are lots of method for calculating land use change in gis systems. if you want to use Arcgis, you should check out Confusion Matrix Analysis for your work. with confusion matrix you can also measure urban sprawl, too.. it is of course necessary to do some research.
i hope it helps you...
As Aragon correctly points out, there are many options for detecting changes in land use using GIS.
Before starting, it's worth being aware of the differences between land USE and land COVER, see here for a helpful explanation (it's certainly a distinction that you'll want to make in your dissertation). In addition, bare in mind that any data that you collect will represent a snapshot of land use/cover at that particular time point and does therefore not necessarily represent trend of changing land use or cover (this is less important for urban studies but is particular poignant for rural studies of land use change where land management practices, such as arable cropping regimes, may frequently change).
A few methods might be (in order of sophistication):
The above should get you started. Also be aware that in the UK we have Land Cover Map 2000 and now LCM2007 (for a useful article on LCM2000 - see here) which, as a student, you will have access to via your university. This dataset might provide a useful starting point but bare in mind it's potential limitations for your study (it is raster based, represents 25m x 25m cells which may be too coarse, depicts land cover and not land USE etc) and the fact that it cannot be compared to the earlier (LCM1990) dataset due to differences in sampling methods.