Delineating lake catchments for all (180 k) Danish lakes
In a previous post I showed how to use R for creating bathymetric maps for lakes. To make this process even easier, I have created two apps using Shiny. The maps can be downloaded, opened in Google Earth on both desktop and mobile making it easy to bring along. Try theme out!
Shiny for interactive data exploration The R Shiny framework is a simple way to turn R analysis or pipelines into interactive web applications.
Knowing the depth of in aquatic environments are of interest to many e.g. sailors in coastal waters or anglers in lakes. We can measure the depth at different geographic coordinates and use this information to produce bathymetric maps and contour lines. Often however, measurements are only obtained from relatively few points which means that interpolation is required to produce continuous and pretty maps. Higher quality maps can be produced using modern sonar and echo-sounder technology but this may also require gaps to be interpolated.
Monitoring of the aquatic environment is necessary to support proper management. The Environmental Protection Agency and Danish Centre For Environment And Energy are responsible for the large scale monitoring of the aquatic environment in Denmark. This covers lakes, streams, coastal habitats and more. Recent and historic monitoring data are publicly available from the surface water database ODA. This is an amazing initiative which I use extensively in my research.