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Overview | Urban Sprawl | Fringe Area Development | Urban Agglomeration | Emerging Technologies | Relevant Links
Application of Remote Sensing and GIS for Detecting Land Use Changes:
A Case Study of Vadodara
Analysis and Results
The classification accuracy was analysed to be for land sat-5 TM 87.50% and land sat -7
ETM+ 84.33% The Kappa coefficient, which measures the reliability of the result, were analysed to be 0.857for 1and sat 5 TM and 0.8214 for land sat-7 ETM+.
From (table 3 )it can be depicted that there is increase in the agricultural area by 1.49% may be due to canal net work introduced while the fallow land have decreased by 12.95%and open land have also decreased by 1.48% at the same time the built up land dense and less dense have both increased . This may be due to the conversion of fallow land into other uses. New institutes and expansion of settlements and industrial plots have been responsible for such changes. Built up area is increasing and expanding towards west, south and NW.
Transport routes of NH and Express highway in NW, industrial estates may have resulted in each change. Population pressure is experienced, adding to increased built up area. The infrastructure facility like road etc. all adds up to built up area.
VUDA suffers from such conflicting uses of conversion of peri agricultural land i.e. fallow land is being converted into other uses. Direction of change and levels of changes can be thus detected from satellite data. The drivers of such changes needs to be further investigated for planning purpose. In near future again changes will be witnessed with implementation of SEZ in the area.
| Class | Reference | Classified | Number | Producers | Users |
| Name | Totals | Totals | Correct | Accuracy | Accuracy |
| Crop Land | 22 | 20 | 18 | 81.82% | 90.00% |
| Dense Built-up Land | 18 | 20 | 16 | 88.89% | 80.00% |
| Less dense built-up Land | 27 | 20 | 18 | 66.67% | 90.00% |
| Vegetation | 18 | 20 | 16 | 88.89% | 80.00% |
| Water bodies | 21 | 20 | 20 | 95.24% | 100.00% |
| Fallow Land | 16 | 20 | 16 | 100.00% | 80.00% |
| Open land | 20 | 20 | 19 | 95.00% | 95.00% |
| Others | 18 | 20 | 17 | 94.44% | 85.00% |
| Totals | 160 | 160 | 140 | | |
Table3. Land use statistics in the study area (1990- 2001).
ACCURACY ASSESSMENT FOR LANDSAT-5 TM 1990
Overall Classification Accuracy = 87.50%
Overall Kappa Statistics = 0.8571
| Class | Reference | Classified | Number | Producers | Users |
| Name | Totals | Totals | Correct | Accuracy | Accuracy |
| Crop Land | 26 |
20 | 18 |
69.23% |
90.00% |
| Dense Built-up Land | 20 | 20 | 19 | 95.00% | 95.00% |
| Less dense built-up Land | 17 | 20 | 16 | 94.12% |
80.00% |
| Vegetation | 20 | 20 | 17 |
85.00% |
85.00% |
| Water bodies | 21 | 20 | 20 | 95.24% | 100.00% |
| Fallow Land | 25 | 20 | 16 | 64.00% | 80.00% |
| Open land | 15 | 20 | 15 | 100.00% | 75.00% |
| Others | 16 | 20 | 14 | 84.50% | 70.00% |
| Totals | 160 | 160 | 135 | | |
ACCURACY ASSESSMENT FOR LANDSAT-7 ETM + 2001
Overall Classification Accuracy = 84.38%
Overall Kappa Statistics = 0.8214
Conclusion
In the course of urban spread, valuable land is being converted for building, industry, transport facilities etc. Land being inadequate, government may need to develop policies to maintain it for intensive cropping and encourage peri-urban agriculture. An absence of any land use planning may lead to land degradation. Un-planned decisions may result into misery for large segment of the local population and destruction of valuable eco-system. Techniques for the planning and management of land resources specifically integrated and holistic will check long term quality of the land for human use, their prevention or resolution of social conflicts related to land use, and the conversion of ecosystem.
Thus it is, essential to review the conventional planning methods and introduce innovative measures like geo- referencing technologies in this regard.
Acknowledgement
We would like to express our gratitude to Department Of Science and Technology, Government of India (SRS4/ES 21/ Baroda Window/ P6) SSS for granting financial aid. We also express due thanks to Prof.L.S.Chamyal, for his constant encouragement.
Reference
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