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Development of Application Software for automatic detection of changes in spatial features over space and time


Objective of the Study
The chief objective of the study is the Development of Application Software for automatic detection of changes in spatial features over space and time.

About the study and Methodology
The above study enables the user to detect changes which have taken place over space and time, as satellite Remote sensing data with their repetitive nature aids in preparing land use / land cover patterns that changes with time. The quantification of such changes are possible even if the resultant spatial datasets are on different scales/resolution. The present study has been taken up in order to detect the changes automatically that have taken place in land - use.

The study encompasses the following modules:
  • Data Acquisition, selection of two time remotely sensed data
  • Generation of Map, preparation of Land – use map using visual interpretation techniques
  • Data Conversion, using MapInfo software by registering the data to an earth coordinate system
  • Digitisation of data, and to generate attribute information for the polygon data generated
  • Conversion to Shape files, using Universal Translator available in MapInfo
  • Spatial Integration of Data, by intersecting the two time data (1980 and 2000) using the module developed which has the facility to ‘Union’, ‘Intersect’ etc. the data as well as to classify the data using ‘Thematic shading’ facility.
  • Invoking MapObjects,
  • Creation of Utility Tool/Menus
  • Selection of unchanged Areas based on Spatial query from the integrated data
  • Automated detection of changed areas
  • Creating Charts based on Changed and Unchanged areas
  • Saving the layers
System Design

Input Design
Consists of Login screen, Main Form, Map Display Form, Path Form, Data Integration Form

Output Design
Where as the output design is formulated for Combine Form, Thematic map or Classification of display purpose Form, Change detection Form.

Creation of Utility Tool/Menus
Some of the utility tools and Menus developed using MapObjects and VB are shown



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