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<div><br></div><div><br></div><div><br></div><div>Jan 3, 2021, 21:01 by tagging@openstreetmap.org:<br></div><blockquote class="tutanota_quote" style="border-left: 1px solid #93A3B8; padding-left: 10px; margin-left: 5px;"><div>Some tags give a default value (for example, with no surface tag it is assumed to be paved).<br></div></blockquote><div>Nope, that is not always a reasonable assumption.<br></div><div><br></div><div>For example highway=track tracktype=grade5<br></div><div><br></div><div>On the other hand highway=motorway is safe to assume as paved<br></div><div><br></div><div>Data consumer is also allowed to not guess at all and handle "missing data"<br></div><div>as a special case.<br></div><div><br></div><div>See also <a href="https://wiki.openstreetmap.org/wiki/Key:surface#Default_values">https://wiki.openstreetmap.org/wiki/Key:surface#Default_values</a><br></div> </body>
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