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File:Four color theorem cell tower circles.png

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Four_color_theorem_cell_tower_circles.png (700 × 400 pixels, file size: 72 KB, MIME type: image/png)

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English: Four color theorem. While the four color problem is less interesting to cartographers, it can help other areas such as cell tower placement. If each cell tower broadcast channel is like a color, and channel–colors are limited to four, then the problem of where to position broadcast towers for maximum coverage and minimal cost is the same as the four-color problem. The challenge? Eliminate non-coverage spots (red) along the highway. In places where multiple channels overlap (dark blue), the channels must be different––colors must be different, so the cell phone signal can be handed off to a different channel.
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Source Own work
Author Tomwsulcer

Note: I created this chart originally for use in the Citizendium article "Four color theorem". The earlier diagram was also public domain. In the diagrams it is noted "PD" (public domain) here.

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I, the copyright holder of this work, hereby publish it under the following license:
Creative Commons CC-Zero This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication.
The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.

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17 April 2012

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Date/TimeThumbnailDimensionsUserComment
current23:43, 17 April 2012Thumbnail for version as of 23:43, 17 April 2012700 × 400 (72 KB)Tomwsulcer

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