提姆·多格特（Tim Doggett）是英國化學企業協會（Chemical Business Association）的執行長，該協會代表從製造商到分銷商、運輸商與貿易商的整個化學品供應鏈，他同時也是英國貿易協會論壇（Trade Association Forum）的董事。
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Now, OsmAnd performs another Dijkstra search, but this time on the much smaller "base graph." This graph consists only of the border points and the pre-calculated shortcut values between them.