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Earthquakes IntroductionIzmit earthquakeFloods Thessaloniki (Greece)Hurricanes Storm surgesHurricane KatrinaVolcanoes IntroductionAndean Volcanic BeltEtnaNyiragongo and Nyamuragira
| | | | | | | Exercise 4: GIS
In this exercise you will create a number of GIS layers and will use them to create a flood map. This map would help the civil protection agencies easily locate areas heavily affected by flooding.
Open the pre-flood_mean.tif image. With GIS, create layers for lake (polygon), villages (point or polygon) and roads (polyline). Digitise the respective information for the above layers, using pre-flood_mean.tif as a background image. Edit the layers according to your preferences (symbol size, colour etc.) and save them.
Now open the RGB.tif image. Create a new polygon layer for flooded areas and digitise them using RGB.tif as a background. Edit and save your layer accordingly.
Now load all the layers that you’ve created (lake, villages, roads, floods) and superimpose them to the pre-flood_mean.tif image. Create a map indicating the areas most affected by the floods. Do not forget to insert a legend, title/subtitle and other elements you believe would be useful for the civil protection agency that would manage the disaster. Save and print your map.
1. How would the results you obtained be useful to the authorities for managing the flood event?
2. Do you believe that similar techniques could be applied to map the effects of other natural disasters as well? If so, give some examples.
3. What benefits do you see in using remote sensing and GIS tools for disaster mapping and monitoring? Are there any drawbacks?
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| | Flash floods in Thessaloniki IntroductionBackgroundExercises Exercise 1: Inspecting the imagesExercise 2: Change detection – band mathExercise 3: Change detection – Multi-temporal analysisEduspace - Software LEOWorks 4 (Linux)LEOWorks 4 (Windows)LEOWorks 4 (MacOS)Eduspace - Download Thessaloniki.zip
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