The park agency to visualize move times on a map is yesteryear using an isochrone layer. An isochrone layer uses lines to connect locations on a map that tin last reached inward the same move time.
Isochrone maps are an established method of visualizing move times on a map as well as conduct keep been used at to the lowest degree since the nineteenth century. That doesn't hateful that cartographers shouldn't experiment amongst other methods of visualizing move times on a map. For event 'accessibility fireworks' as well as 'time cartograms' are 2 other methods that tin last used if you lot desire to display move fourth dimension on a map.
Topi Tjukanov has created a actually interesting move fourth dimension map which shows journeying times from Kallio inward Helsinki to everywhere else inward the Helsinki percentage using unlike modes of transport. In Topi's animated map Accessibility Fireworks a let on of colored dots are all released on Kallio on the map at the same time. They are thus animated equally they move through the metropolis to their finish when they thus disappear from the map. Each minute of the animation represents i infinitesimal of move time.
This animated isochrone technique industrial plant actually agency inward unopen to areas. For event the slowest yellowish dots, representing populace transit, which linger on the map inward the north-east of Helsinki actually emphasize how ill-served this usage of the metropolis is yesteryear populace transport. The uniform distribution of the greenish dots. representing move yesteryear bike, reveals how near parts of the metropolis tin last reached inward a fairly uniform fourth dimension yesteryear bicycle (although over again the far north-east of the Helsinki percentage takes the longest to reach).
Another approach to visualizing move fourth dimension on a map is to usage a fourth dimension cartogram. In a fourth dimension cartogram geographic distance on the map is replaced yesteryear a fourth dimension attribute such equally move fourth dimension (Eric Fischer has posted a few time cartograms of San Francisco to Flickr). However the employment amongst fourth dimension cartograms (as amongst all cartograms) is legibility. When you lot distort a map yesteryear another variable apart from distance the map tin rapidly larn illegible, equally users combat to recognize the expanse which has been mapped.
Nate Parrott has created an interactive fourth dimension cartogram to demo NYC Subway Travel Time. If you lot click on a subway station on Nate's map thus the subway map automatically redraws itself thus that the distance to all stations is based on the journeying fourth dimension from your selected station. This interactive fourth dimension cartogram industrial plant actually good equally a visualization of journeying times as well as it doesn't endure thus much from the park problems of illegibility mutual to many fourth dimension cartograms. This is partly due to the fact that the map's users are already familiar amongst the concept that transit maps distort geography as well as are non strictly geographically accurate.
