The green agency to visualize locomote times on a map is past times using an isochrone layer. An isochrone layer uses lines to connect locations on a map that tin hold upwardly reached inward the same locomote time.
Isochrone maps are an established method of visualizing locomote times on a map in addition to make got 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 locomote times on a map. For event 'accessibility fireworks' in addition to 'time cartograms' are 2 other methods that tin hold upwardly used if you lot desire to display locomote fourth dimension on a map.
Topi Tjukanov has created a actually interesting locomote fourth dimension map which shows journeying times from Kallio inward Helsinki to everywhere else inward the Helsinki portion 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 in addition to thus animated every bit they locomote through the metropolis to their finish when they in addition to thus disappear from the map. Each minute of the animation represents 1 infinitesimal of locomote time.
This animated isochrone technique plant actually agency inward about areas. For event the slowest yellowish dots, representing world transit, which linger on the map inward the north-east of Helsinki actually emphasize how ill-served this business office of the metropolis is past times world transport. The uniform distribution of the light-green dots. representing locomote past times bike, reveals how close parts of the metropolis tin hold upwardly reached inward a fairly uniform fourth dimension past times cycle (although over again the far north-east of the Helsinki portion takes the longest to reach).
Another approach to visualizing locomote fourth dimension on a map is to operate a fourth dimension cartogram. In a fourth dimension cartogram geographic distance on the map is replaced past times a fourth dimension attribute such every bit locomote fourth dimension (Eric Fischer has posted a few time cartograms of San Francisco to Flickr). However the work amongst fourth dimension cartograms (as amongst all cartograms) is legibility. When you lot distort a map past times another variable apart from distance the map tin speedily choke illegible, every bit 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 in addition to 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 plant actually good every bit a visualization of journeying times in addition to it doesn't endure thus much from the green 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 in addition to are non strictly geographically accurate.
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