<div dir="ltr"><div dir="ltr"><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, 29 Nov 2021 at 09:29, Dian Ågesson <<a href="mailto:me@diacritic.xyz">me@diacritic.xyz</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div style="font-size:10pt;font-family:Verdana,Geneva,sans-serif">
<p><span style="font-size:10pt">Suburbs and Localities in Australia are all using </span><a href="https://wiki.openstreetmap.org/wiki/Tag:boundary%3Dadministrative#10_admin_level_values_for_specific_countries" target="_blank" style="font-size:10pt">admin_level=10</a><span style="font-size:10pt">, and s</span><span style="font-size:10pt">ome changes in early 2020 to the default map rendering (</span><a href="https://github.com/gravitystorm/openstreetmap-carto/issues/4016" target="_blank" style="font-size:10pt">https://github.com/gravitystorm/openstreetmap-carto/issues/4016</a><span style="font-size:10pt">) significantly reduced the prominence of admin_level 9 and 10 tags. While some other countries do use levels 9 and 10 for "suburbs", most seem to use it for neighbourhoods, sub-divisions, etc. I feel as though this makes Australia's usage a bit of an outlier, as a 'suburb' has more prominence than a generic neighbourhood would. There are also a few entries in the existing admin_level structure that seem out of place?</span></p></div></blockquote><div>place=* and admin_level=* from a data consumer and renderer are independent. So long as they are tagged as place=suburb then the renderer shouldn't care what admin_level it is associated with.</div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div style="font-size:10pt;font-family:Verdana,Geneva,sans-serif"><p><span style="font-size:10pt">I can see this was discussed in September 2020 (</span><a href="https://lists.openstreetmap.org/pipermail/talk-au/2020-September/013976.html" target="_blank" style="font-size:10pt">https://lists.openstreetmap.org/pipermail/talk-au/2020-September/013976.html</a><span style="font-size:10pt">). In that thread, the hierarchy of places was agreed to be generally Country>State>LGA>locality (town/suburb)>land parcel, but the implications for rendering weren't covered. </span><br></p>
<p>I would like to propose that we adjust the admin_level to better align with the general usage of suburb within the community, with the additional benefit of better rendering consistent with the boundary usage internally.</p></div></blockquote><div>If you look at the Geoscape Administrative Boundaries data <a href="https://geoscape.com.au/data/administrative-boundaries/">https://geoscape.com.au/data/administrative-boundaries/</a> it covers</div><div><br></div><div>1. Localities <br>2. Local Government Areas (LGAs) <br>3. Wards <br>4. Australian Bureau of Statistics (ABS) Boundaries <br>5. Electoral Boundaries <br>6. State Boundaries<br>7. Town Points<br></div><div><br></div><div>I think the only true administrative boundaries we have are Australia (place=country), State Boundaries (place=state), LGAs (place=county/municipality), Wards, Localities (place=suburb within a city, place=town, village, hamlet outside of cities), Electoral Boundaries.</div><div><br></div><div>Town Points aren't boundaries, and ABS Boundaries shouldn't belong in OSM.</div><div><br></div><div>Other boundaries like School Intake Zones, Police Local Area Commands, Health Districts are probably too narrow in scope to belong in OSM.</div><div><br></div><div>Given the use of postcodes for addressing we should add them to OSM, but mostly they've been added as a postal_code tag on a locality boundary or addr:postcode tag on an address, because the boundaries are not open.</div><div><br></div><div>Since we don't have formally defined boundaries for place=region,district,city,quarter,neighbourhood,city_block should we be adding an admin_level at all?</div><div><br></div><div>So should we remove 7/5?</div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div style="font-size:10pt;font-family:Verdana,Geneva,sans-serif">
<p><strong>Current Usage</strong></p>
<table style="border-collapse:collapse;width:99.8312%;height:32px" border="1">
<tbody>
<tr style="height:16px">
<td style="width:9.73694%;height:16px">2</td>
<td style="width:9.73694%;height:16px">3</td>
<td style="width:9.73694%;height:16px">4</td>
<td style="width:9.73694%;height:16px">5</td>
<td style="width:9.73694%;height:16px">6</td>
<td style="width:9.73694%;height:16px">7</td>
<td style="width:9.73694%;height:16px">8</td>
<td style="width:9.73694%;height:16px">9</td>
<td style="width:9.74742%;height:16px">10</td>
</tr>
<tr style="height:16px">
<td style="width:9.73694%;height:16px"><em>Australia</em></td>
<td style="width:9.73694%;height:16px"><none></td>
<td style="width:9.73694%;height:16px">State/Territory Border</td>
<td style="width:9.73694%;height:16px"><none></td>
<td style="width:9.73694%;height:16px">LGA Border</td>
<td style="width:9.73694%;height:16px"><span>District or Region Border (e.g Greater Sydney, Greater Melbourne, etc.)</span></td>
<td style="width:9.73694%;height:16px">Australia Post Postode Border</td>
<td style="width:9.73694%;height:16px">Locality Border (ONLY where larger than ABS boundary)</td>
<td style="width:9.74742%;height:16px">Locality Border (suburbs or towns)</td>
</tr>
</tbody>
</table>
<p><strong>Proposed Usage</strong></p>
<p><br></p>
<table style="border-collapse:collapse;width:99.8312%;height:32px" border="1">
<tbody>
<tr style="height:16px">
<td style="width:9.73694%;height:16px">2</td>
<td style="width:9.73694%;height:16px">3</td>
<td style="width:9.73694%;height:16px">4</td>
<td style="width:9.73694%;height:16px">5</td>
<td style="width:9.73694%;height:16px">6</td>
<td style="width:9.73694%;height:16px">7</td>
<td style="width:9.73694%;height:16px">8</td>
<td style="width:9.73694%;height:16px">9</td>
<td style="width:9.74742%;height:16px">10</td>
</tr>
<tr style="height:16px">
<td style="width:9.73694%;height:16px"><em>Australia</em></td>
<td style="width:9.73694%;height:16px"><em><none></em></td>
<td style="width:9.73694%;height:16px">State/Territory Border</td>
<td style="width:9.73694%;height:16px"><span>District or Region Border (e.g Greater Sydney, Greater Melbourne, etc.)</span></td>
<td style="width:9.73694%;height:16px">LGA Border</td>
<td style="width:9.73694%;height:16px">(none)</td>
<td style="width:9.73694%;height:16px">Locality Border (suburbs or towns)</td>
<td style="width:9.73694%;height:16px">(none)</td>
<td style="width:9.74742%;height:16px">(none)*</td>
</tr>
</tbody>
</table>
<p>* Australia Post Borders would be changed from boundary=administrative to boundary=postal_code, or put here if appropriate.</p></div></blockquote><div>I checked via the overpass wizard query "admin_level=8 in AU" and there are no results, so no australia post borders are mapped that way, and I'm not aware of any.</div><div><br></div><div>boundary=postal_code is only used for one postcode in melbourne where it didn't follow locality boundaries and couldn't be tagged as postal_code on the locality.</div><div><br></div><div>ACT has a good set of boundary=postal_code.</div><div><br></div><div>So I'm supportive of removing Australia Post Postode Border from admin_level=8.</div><div><br></div><div>That leaves should we move localities from 9 to 8? I don't think it really matters much to be honest.</div><div><br></div></div></div>