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. 2018 May 30;19:190. doi: 10.1186/s12859-018-2201-7

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© The Author(s) 2018

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 3 — Characteristics of the Flickr test data – a spatial density of occurrence records per grid cell across all taxa; b record distribution per month of observation; c average distance to nearest neighbor occurrence per taxon; d frequency distribution of occurrence records per grid cell; e record distribution per year of observation