Over the last 40 years, Thailand experienced tremendous shifts in land use due to a booming aquaculture industry. Widespread flooding of land to create shrimp farms impacted sensitive ecosystems across the country, but particularly along the coast. Shrimp exports boomed and production went uncontrolled through the 1980s, which decimated a large portion of mangrove forests on the coast of Thailand. In 1991, the Department of Fisheries in Bangkok enacted regulations on shrimp aquaculture in an effort to salvage the remaining mangrove ecosystems. A 1995 report by the Food and Agriculture Organization (of the United Nations) Network of Aquaculture Centers in Asia-Pacific offered a detailed assessment of the aquaculture industry before and after the implementation of these regulations. Working closely with the Department of Fisheries in Bangkok, they came to a number of conclusions that were critical to the health of coastal ecosystems in this area:
As a GIS analyst for a nonprofit organization focusing on conservation and sustainable aquaculture practices, your goal is to find historical Landsat imagery for the Samut Songkhram province south of Bangkok. You need to create a web application that identifies an area of the province that experienced the most significant change from the boom of the 1980s, and the rate of change after the implementation of regulations on the industry. Your presentation will be shared with donors and investors to procure funding for the restoration of coastal ecosystems, and to ensure the continued education of new shrimp farmers in the affected area.
In this lesson, you’ll build a web mapping application that identifies which region of Samut Songkhram province should be the focus of conservation efforts. You’ll retrieve one image for each decade since the 1970s from the Living Atlas Landsat archive for the entire study area. Once you have the images, you will alter the available multispectral data to enhance vegetation, land, and water. Then, you will configure the time animation tool in ArcGIS Online, and create a custom time-aware application for publishing your observations.
|Retrieve historical imagery||Add administrative boundaries and Landsat imagery to a map.||10 minutes|
|Show imagery over time||Enable time, apply filters, and use infrared data for enhanced images.||15 minutes|
|Share your results as a web app||Configure a time-enabled web app and share your findings.||20 minutes|