Implement temporary solution for elevation

[rafapereirabr]

Ideally, we would like to see an solution that accounts for elevation implemented upstream in R5. In the meantime, we will be implementing a temporary solution in r5r. More info about this temporary solution in this issue.

[rafapereirabr]

Setting this issue as priority, to be incorporated in the next package release.

[rafapereirabr]

I've added included a couple lines of code to checkmate::assert_ inputs. I've also added some tests to the elevation functions.

[rafapereirabr]

@mvpsaraiva , does this temporary solution only work for walking (see function description) ? or does it affect cycling speeds/routing as well?

#' Tobler's hiking function
#'
#' @description Calculates effect of the topography on walking speeds, using
#'              Tobler's hiking function.

[rafapereirabr]

I've also updated the NEWs file

[rafapereirabr]

this issue will be closed once we merge dev and master branches

[mvpsaraiva]

@mvpsaraiva , does this temporary solution only work for walking (see function description) ? or does it affect cycling speeds/routing as well?

Tobler's hiking function works for walking trips only. The code for weighting cycling trips is in the Java side, inside the jar.

[rafapereirabr]

Ok , thanks for the clarification !