Imports github.com/amundsentech/gpx-decode github.com/amundsentech/kml-decode github.com/fogleman/delaunay github.com/golang/geo/s2 github.com/lumin8/elev-utils github.com/paulmach/go.geo github.com/paulmach/go.geojson github.com/paulmach/orb github.com/paulmach/orb/planar Standard library imports bytes encoding/csv errors fmt io io/ioutil math os path path/filepath strconv strings sync