@article {Phillips:1979-12-01T00:00:00:0008-7041:72,
	author = "Phillips, Richard J.",
	title = "An Experiment with Contour Lines",
	journal = "Cartographic Journal, The",
	volume = "16",
	number = "2",
	year = "1979-12-01T00:00:00",
	abstract = "Map readers are generally faster and more accurate in interpreting relief from layer tint maps than from contour maps. This paper discusses methods of improving contour maps and reports an experiment where conventional contours were compared with contour lines elaborated to produce a 'wedding cake' effect, but this elaboration did not improve performance. The main problem for adults when reading contour maps may be a difficulty in integrating small areas of relief in order to visualise a larger area. If this is correct, no simple elaboration of contour lines will help the map reader unless it gives contours the conspicuity which layer tint colours have in peripheral vision.",
	pages = "72-76",
	url = "http://www.ingentaconnect.com/content/maney/caj/1979/00000016/00000002/art00002",
	doi = "doi:10.1179/000870479788238513"
}