GIT Geology and Information Technology

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Antonia Andrews
8 years ago
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1 Luca Fallati Università degli Studi di Milano-Bicocca: MaRHE Marine Research and High Educational Centre

2 Land Use Changes (LUC) in developing countries are: - faster and widespread; - often not surveyed for lack of data and monitoring programs; In tropical coastal regions LUC can be a threat for the fragile marine ecosystem of the coral reef

data and monitoring programs; In tropical coastal regions

3 Introduction Study Area Methodology & Results Web GIS application Conclusions Republic of Maldives Small Island Developing States Increase of the LUC in the last decades due to: - Population growth - Tourism growth All the LUC happened without monitoring programs. There were no Land Use national map and no LUC data.

last decades due to: - Population growth - Tourism growth All the LUC happened

4 National Area: 859,000 Km 2 Only 1% is land with an elevation of 1 m above the sea level 1190 islands: uninhabited inhabited resort

5 The islands types are easily distinguishable using Remote Sensing Data Uninhabited Inhabited Resort

6 The study was divided in 4 steps 1 STEP: - Choice of appropriate Remote Sensing Data; - Creation of a Land Use Classification; - Images classification; 2 STEP: - Fieldwork, collection of Ground Control Points; 3 STEP: - Post-Classification Comparison to detect LUC; 4 STEP: - Realization of a Web GIS application;

classification; 2 STEP: - Fieldwork, collection of Ground Control Points; 3

7 ESRI Basemap: World Imagery Free using ArcGIS Coverage 80% of the Maldivian islands High-resolution DigitalGlobe Images WV1, WV2 Metadata-enable

8 Land Use classes Hierarchical Classification: LEVEL I 1. URBAN OR BUILD UP LAND 2. AGRICULTURAL LAND 3. HERBACEUS UP-LAND 4. SHRUBLAND 5. FOREST LAND 6. BARREN LAND 7. WETLAND 8. INFRASTRUCTURE 9. CLOUD

9 Visual interpretation and manual digitation

10 Visual interpretation and manual digitation

11 Visual interpretation and manual digitation

12 Visual interpretation and manual digitation

15 Fieldwork: 25 October to 10 November 2013 Faafu Atoll, Magoodhoo island

17 Geographic accuracy Thematic accuracy

18 Contingency Table Overall Accuracy of the Land Use Map: 85%

19 Land Use Change detection Google Earth Images: Images only after 2002 Coverage not uniform Post Classification Comparison: IDRISI 17.0 Selva Edition, Clark Labs Land Change Modeler application

21 Web GIS application Free access ArcGIS Online Allows to create interactive web maps and apps shareable with anyone No need to be a programmer Bicocca University Account Web map and application linked to MaRHE website WebGIS application for mobile devices

22 Web Map linked to MaRHE website

23 Web application linked to MaRHE website

24 Web Application linked to MaRHE website

25 WebGIS application for mobile devices

26 WebGIS application for mobile devices

27 WebGIS application for mobile devices

28 Conclusions High accuracy of the Land Use map realized Repeatability of the methodology for similar geographic situation Land Use Change maps are useful to understand the driving forces and the impacts of the changes WebGiS application, using ArcGIS Online, is easy to realize and to share with anyone

29 Thank you for your attention

WORKSHOP Sustainable Tourism and Fragile Environment Sustainability and Development in Small Island Communities Maldives

WORKSHOP Sustainable Tourism and Fragile Environment Sustainability and Development in Small Island Communities Maldives May 29 th June 5 th 2015 (the dates are indicative and may be modified due to Flights