Skadi can be used to access digital elevation model data which is useful in computing steepness of edges in the route graph or generating an elevation profile along a computed route. In keeping with the Norse mythological theme, the jotunn/goddess Skaði was chosen as she is associated, among other things, with the mountains. Since skadi deals mostly with extracting elevation data from various datasets, this seemed like a fitting name!
Skadi is essentially a set of various data structures and alogrithms which deal with things like: sampling elevation data in an adhoc or evenly sampled manner as well as serving elevation data in structured (json) or raw (geotiff) formats.
What follows are some notable components of Skadi.