[This article was first published on R – TomazTsql, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here)Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.We have all seen colourful signposts with great cities and their distances – how far each is from this current standpoint.And fundamental question is, how correct these distances are? Or even, one should ask, how honest a particular signpost is, regarding the current standpoint.So let’s put this utterly most fundamental question to the test And since it is vacation time, you can grab the R code and check it yourself Image stumbling upon the post and wanted to check if this post is really relevant for this location. It can be a photo from other side of the world, hanging in the lobby of your holiday hotel And this sure ain’t honest signpost The R code iterates through each city, finds matching points (where all circles meet) and searches for the nearest location. It uses OpenStreetMap (short: OSM) to extract all the geolocations and looks for possible intersections of all pointsgeocode_city