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3 METHODOLOGY 
The methodology adopted in the present study to carry out the details of the land use / land cover mapping is given in the 
flow chart. However, the understanding of classification, interpretation, delineation, fieldwork, final mapping and area 
tabulation to facilitate this study is carried out in the following stages, which are as follows: 
3.1 Pre — field work 
3.2 Field work 
3.3 Post — field work 
3.1 PRE- FIELD WORK 
1. Literature Review. 
Land use / Land cover Classification . 
e Designing land use/land cover classification scheme based on the available data source. 
e Defining the different land use / land cover classes. 
3. Base map formation. 
e Preparation of base map on 1: 25,000 scale, all the natural and manmade features like roads, drainage and 
landmarks were incorporated on the base map for easy transfer of details from interpreted overlays. 
4 Interpretation. 
Setting the minimum delineation unit (5 mm x Smm)for classifying the different land use/ land cover. 
e Visual interpretation of the Remote sensing data by using the usual clues such as shape, size, pattern, texture, 
tone and associated features as well as local knowledge. 
Transfer of interpreted information onto the base map. 
A grid of lemxlem or (250 Mts. X 250 Mts.) was drawn on the interpreted map for marking sample points. 
Marking of the doubtful cases on the map for field checking in order to ascertain It's actual use. 
Interpretation results of two database (1993 and 1996) are recorded in the digital form by doing scanning. These 
scanned maps are digitised by doing on screen digitisation to form a digital data base for computer based 
analysis, which will serve the base for all the information regarding the land use/ land covers statistics and as 
well as land use / land cover change analysis. 
32 FIELD WORK 
|. Reconnaissance survey to get a general idea of the area features environment and accessibility. 
2. Checking of sample points . 
3. Checking of unresolved cases. After checking the polygons they were assigned in appropriate classification code. 
33 POST FIELD WORK 
l. Finalisation of land use map is done after incorporating necessary corrections and modifications after field check. 
2. Scanning/ digitisation of maps which are updated during the field survey. 
3. Area calculation. 
4. Land use / land cover change analysis. 
5. Preparation of Final maps Tables and Charts. 
6. Report Writing and Submission. 
4 DATA BASE FORMATION AND LAND USE CHANGE ANALYSIS 
4.1 LAND USE ANALYSIS 
Since 1993 a considerable change had taken place on the land use of Enschede City and its environs. From 1996 IRS 
image it was possible to delineate the major land use. The interpretation was cross-checked with the aerial rectified 
photographs of year 1996. Regarding the land use for the year 1998, it was only updated by doing the field survey. 
During survey main emphasis was given to the construction sites. Table 4.1 indicates the total areas of different land 
uses for the three consecutive years calculated from the data input. 
  
International Archives of Photogrammetry and Remote Sensing. Vol. XXXIII, Part B7. Amsterdam 2000. 995