This app allows users to locate and track green spaces such as wetlands, public gardens, greenways, etc. Users can upload information such as photos, location, green space categorization to update the database of the app. There are several purposes of the app: 1) improve general population’s knowledge and awareness about the green infrastructure; 2) improve the quality of data points from users via the user interaction; 3) provide a large amount of high-quality data for research in term of wetland map, indicators, and model.