<div dir="ltr">Hi,<div><br></div><div>Mapbox has this feature: </div><h1 class="" style="margin:0px 0px 10px;padding:0px;border:0px;font-family:'Open Sans Bold',sans-serif;font-size:25px;font-weight:normal;font-stretch:inherit;line-height:35px;vertical-align:baseline;color:rgb(43,63,86);text-align:center;background-color:rgb(248,248,248)">Robust navigation with smart nearest neighbor search</h1><div><a href="https://www.mapbox.com/blog/smart-neighbor/">https://www.mapbox.com/blog/smart-neighbor/</a></div><div>It looks like very useful.</div><div><br></div><div><div><div class="gmail_signature"><b>Best Regards,</b><div><b>ZhiQiang ZHAO</b></div></div></div>
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