Distance is a key tool in many geospatial analasis . Ther are basacly 3 types of distance that are relevant Euclidain as the crow flyes) distance Graph distance a distance mesure over a grapt for isntance a reoad or rail graph. This distance cen be expresed in “distance units or in time units. A variation of the graph distance is the transport time sonsidering differant modes of transport including timtabels Finaly we ofthen work with cost surfices
Tools for diustance calucattion
OTP a java progrm QNEAT3 a qgis plugin