different isochrones generated for same parameters about osrm HOT 2 CLOSED

Hi,
There is 2 things here :

• the OSRM engine is based on OpenStreetMap data and OpenStreetMap is continuously updated. So results based on OSM evolve accordingly.
• the last osrm (the R package) update has introduced a modification of the isochrone algorithm.

https://github.com/rCarto/osrm/blob/master/NEWS:

• The algorithm for isochrone has been changed to a more robust one that use isoband package, results may differ...

If you want to obtain the same isochrones, you have to use the same dataset (use your own, time-stamped, version of OSRM server) and the same version of the osrm package:

packageurl <- "https://cran.r-project.org/src/contrib/Archive/osrm/osrm_3.2.0.tar.gz"
install.packages(packageurl, repos=NULL, type="source") 

for the previous version.

from osrm.

Thank you for the explanation!

from osrm.