Travel Fourth Dimension Fireworks

The commons 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 go reached inward the same move time.

Isochrone maps are an established method of visualizing move times on a map in addition to induce got been used at to the lowest degree since the nineteenth century. That doesn't hateful that cartographers shouldn't experiment alongside other methods of visualizing move times on a map. For event 'accessibility fireworks' in addition to 'time cartograms' are 2 other methods that tin go 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 dissimilar modes of transport. In Topi's animated map Accessibility Fireworks a disclose of colored dots are all released on Kallio on the map at the same time. They are in addition to then animated equally they move through the metropolis to their finish when they in addition to then disappear from the map. Each instant of the animation represents ane infinitesimal of move time.

This animated isochrone technique 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 business office of the metropolis is yesteryear populace transport. The uniform distribution of the greenish dots. representing move yesteryear bike, reveals how nearly parts of the metropolis tin go reached inward a fairly uniform fourth dimension yesteryear wheel (although ane time to a greater extent than 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 operate 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 occupation alongside fourth dimension cartograms (as alongside all cartograms) is legibility. When you lot distort a map yesteryear another variable apart from distance the map tin chop-chop snuff it illegible, equally users scrap to recognize the expanse which has been mapped.

Nate Parrott has created an interactive fourth dimension cartogram to exhibit NYC Subway Travel Time. If you lot click on a subway station on Nate's map in addition to then the subway map automatically redraws itself hence 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 equally a visualization of journeying times in addition to it doesn't endure hence much from the commons problems of illegibility mutual to many fourth dimension cartograms. This is partly due to the fact that the map's users are already familiar alongside the concept that transit maps distort geography in addition to are non strictly geographically accurate.