Development of database (spatial and attribute data) for GIS :

The Survey of India (SOI) toposheets of scale 1:1000 of IISc campus in 10 sheets and GIS software Geomedia Professional 5.1 and Geomedia Grid were used to build the vector layers of IISc boundary, boundary with landmarks, buildings, roads, surrounding lakes of IISc, IISc zones based on utilities, tree distribution, canopy cover in IISc based on NDVI ranges, drainage and contours.

A vector layer of vegetation showing all the trees (species wise) in the IISc was prepared through an extensive field survey carried out simultaneously. Contour maps (generated using Geomedia Professional 5.1 and Geomedia Grid) are used to generate slope maps of the area and DEM.

The SOI toposheets (scale 1:1000) were scanned and georegistered in geomedia professional. For georegistration a feature class definition of point feature was made and the original corner points from the topsheets were inserted for that point feature class. Then the scanned toposheet was brought to the geoworkspace working window with the help of insert interactive images. The image is selected through the select tool and source control point and target control points are inserted through the image registration dialog. For each feature class, projection system is defined and the datum and projection is set as per the geographical location of the region and through digitization of the raster image, individual features (like roads, contours etc.) are transformed to vector format.

Different feature class (layers) of IISc was created. This includes boundary, boundary with landmarks, buildings, surrounding lakes, zones based on utilities, tree distribution, canopy cover and contour layer (1m interval) by digitizing toposheets SOI (scale 1:1000).