<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div><br></div><div><br></div><div><br>On May 28, 2015, at 6:22 PM, AYTOUN RALPH <<a href="mailto:ralph.aytoun@ntlworld.com">ralph.aytoun@ntlworld.com</a>> wrote:<br><br></div><blockquote type="cite"><div dir="ltr">And with this argument for a hierarchical approach we are back to the start point of umbrella tags that cover all possibilities which is <div><br></div><div>landuse=educational as a polygon encompassing the whole area and the whole range of educational facilities.</div><div><br></div><div>using landuse=school excludes universities, colleges, etc and you would then need other tags landuse=university and landuse=college, which then makes the landuse tagging specific instead of general.</div><div><br></div><div>If we look at <a href="http://wiki.openstreetmap.org/wiki/Key:landuse">http://wiki.openstreetmap.org/wiki/Key:landuse</a> the first sentence is correct "<span style="color:rgb(37,37,37);font-family:sans-serif;font-size:14px;line-height:22.3999996185303px">Mainly used for describe the <b>primary use</b> of land by humans."</span></div><div><span style="color:rgb(37,37,37);font-family:sans-serif;line-height:22.3999996185303px">so the hierarchical approach should then be something like</span></div><div><span style="color:rgb(37,37,37);font-family:sans-serif;line-height:22.3999996185303px">landuse=agriculture... agriculture would then be sub categorised with farmland (worked land for crops), orchard (trees planted for their fruits), vineyard, pasture, etc.</span></div><div><span style="color:rgb(37,37,37);font-family:sans-serif;line-height:22.3999996185303px">landuse=residential (could be divided into urban and rural which have totally different infrastructures)</span></div><div><span style="color:rgb(37,37,37);font-family:sans-serif;line-height:22.3999996185303px">landuse=commercial</span></div><div><span style="color:rgb(37,37,37);font-family:sans-serif;line-height:22.3999996185303px">landuse=industrial</span></div><div><span style="color:rgb(37,37,37);font-family:sans-serif;line-height:22.3999996185303px">landuse=educational</span></div><div><span style="color:rgb(37,37,37);font-family:sans-serif;line-height:22.3999996185303px">landuse=civic</span></div><div><span style="color:rgb(37,37,37);font-family:sans-serif;line-height:22.3999996185303px">landuse=transport</span></div><div><font color="#252525" face="sans-serif"><span style="line-height:22.3999996185303px">instead of the myriad of specifics that we now have like landuse=peat_cutting and landuse=salt_pond....these are all sub categories of the primary use of the land.</span></font></div><div><font color="#252525" face="sans-serif"><span style="line-height:22.3999996185303px">I know this has diverted from the main topic here but I wanted to point out the overall usage to highlight how my suggestion fits into the overall picture.</span></font></div></div><div class="gmail_extra"><br><div class="gmail_quote"><blockquote type="cite"></blockquote></div></div></blockquote><br><div>+1 </div><div><br></div><div>There are advantages to certain separations (to make it easier on renders), but there are so many very specific land land uses, while whole categories don't have a single tag. </div><div><br></div><div>A hierarchical system has room to accept new tags while keeping everyone on the same level of importance. The downside is when one group or culture sees a whole category in a different way - a primary road in Japan has a completely different meaning than the rest of OSM, for example.</div><div><br></div><div>But I prefer the <span style="background-color: rgba(255, 255, 255, 0);">hierarchical system - a flat tag system has good points, but it's so hard to document and learn, and probably to keep renderer a up to date - as a minor change requires a whole new tag, instead of a new sub-tag value. </span></div><div><span style="background-color: rgba(255, 255, 255, 0);"><br></span></div><div><span style="background-color: rgba(255, 255, 255, 0);">Javbw </span></div><div><span style="background-color: rgba(255, 255, 255, 0);"><br></span></div><div><span style="background-color: rgba(255, 255, 255, 0);"><br></span></div></body></html>