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. 2019 Nov 7;6:266. doi: 10.1038/s41597-019-0265-5

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© The Author(s) 2019

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Fig. 3 — Validation outputs. (a) Difference in estimates in minutes (our estimates − Google journey times), (b) percentage difference in estimates (100 × [our estimates − Google journey times]/Google journey times), (c) histogram of difference in minutes, (d) histogram of percentage difference. Panels a and c, and panels b and d have the same colour schemes. Country boundaries are from GADM v3.6.