<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div dir="ltr"></div><div dir="ltr">The Surface Hydrology Lines covering all of Australia from GeoScience Aust is available for use in osm and has a perenniality column</div><div dir="ltr"><div style="display: block;" class=""><div style="-webkit-user-select: all; -webkit-user-drag: element; display: inline-block;" class="apple-rich-link" draggable="true" role="link" data-url="https://wiki.openstreetmap.org/wiki/Australian_Data_Sources"><a style="border-radius:10px;font-family:-apple-system, Helvetica, Arial, sans-serif;display:block;-webkit-user-select:none;width:300px;user-select:none;-webkit-user-modify:read-only;user-modify:read-only;overflow:hidden;text-decoration:none;" class="lp-rich-link" rel="nofollow" href="https://wiki.openstreetmap.org/wiki/Australian_Data_Sources" dir="ltr" role="button" draggable="false" width="300"><table style="table-layout:fixed;border-collapse:collapse;width:300px;background-color:#E9E9EB;font-family:-apple-system, Helvetica, Arial, sans-serif;" class="lp-rich-link-emailBaseTable" cellpadding="0" cellspacing="0" border="0" width="300"><tbody><tr><td vertical-align="center"><table bgcolor="#E9E9EB" cellpadding="0" cellspacing="0" width="300" style="font-family:-apple-system, Helvetica, Arial, sans-serif;table-layout:fixed;background-color:rgba(233, 233, 235, 1);" class="lp-rich-link-captionBar"><tbody><tr><td style="padding:8px 0px 8px 0px;" class="lp-rich-link-captionBar-textStackItem"><div style="max-width:100%;margin:0px 16px 0px 16px;overflow:hidden;" class="lp-rich-link-captionBar-textStack"><div style="word-wrap:break-word;font-weight:500;font-size:12px;overflow:hidden;text-overflow:ellipsis;text-align:left;" class="lp-rich-link-captionBar-textStack-topCaption-leading"><a rel="nofollow" href="https://wiki.openstreetmap.org/wiki/Australian_Data_Sources" style="text-decoration: none" draggable="false"><font color="#000000" style="color: rgba(0, 0, 0, 1);">Australian Data Sources</font></a></div><div style="word-wrap:break-word;font-weight:400;font-size:11px;overflow:hidden;text-overflow:ellipsis;text-align:left;" class="lp-rich-link-captionBar-textStack-bottomCaption-leading"><a rel="nofollow" href="https://wiki.openstreetmap.org/wiki/Australian_Data_Sources" style="text-decoration: none" draggable="false"><font color="#A2A2A9" style="color: rgba(60, 60, 67, 0.6);">wiki.openstreetmap.org</font></a></div></div></td><td style="padding:6px 12px 6px 0px;" class="lp-rich-link-captionBar-rightIconItem" width="36"><a rel="nofollow" href="https://wiki.openstreetmap.org/wiki/Australian_Data_Sources" draggable="false"><img style="pointer-events:none !important;display:inline-block;width:36px;height:36px;border-radius:3px;" width="36" height="36" draggable="false" class="lp-rich-link-captionBar-rightIcon" alt="favicon.ico" src="cid:B9F085BD-6A97-47D1-9086-A6E29AB45D01"></a></td></tr></tbody></table></td></tr></tbody></table></a></div></div><br></div><div dir="ltr"><br><blockquote type="cite">On 26 May 2023, at 2:57 pm, Tom Brennan <website@ozultimate.com> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><span>DCS Base and Topo don't distinguish between perennial and non-perennial</span><br><span></span><br><span>That information is available in the NSW Water Theme data eg:</span><br><span>https://portal.spatial.nsw.gov.au/portal/home/item.html?id=7b0e959effd749c788d304a4179abf8a</span><br><span></span><br><span>That data is licensed under CC BY 4, which I think we have permission to use. (I haven't used it, but if allowed, it would make sense rather than tracing individual lines).</span><br><span></span><br><span>Though I'd be a bit dubious about some of the things that are classified perennial vs non-perennial. It looks algorithmic, and not entirely internally consistent! Pretty sure I could write a better algorithm.</span><br><span></span><br><span>cheers</span><br><span>Tom</span><br><span>----</span><br><span>Canyoning? try http://ozultimate.com/canyoning</span><br><span>Bushwalking? try http://bushwalkingnsw.com</span><br><span></span><br><span>On 26/05/2023 7:56 am, Graeme Fitzpatrick wrote:</span><br><blockquote type="cite"><span>On Thu, 25 May 2023 at 22:26, Tom Brennan <website@ozultimate.com <mailto:website@ozultimate.com>> wrote:</span><br></blockquote><blockquote type="cite"><span> I'm looking at adding missing stream data in national parks around</span><br></blockquote><blockquote type="cite"><span> Sydney.</span><br></blockquote><blockquote type="cite"><span> However, how much value is there in bringing in all of the stream data</span><br></blockquote><blockquote type="cite"><span> in say the DCS Base Map vs just the named streams?</span><br></blockquote><blockquote type="cite"><span> I can see for example, the value in bringing in named streams. But</span><br></blockquote><blockquote type="cite"><span> there</span><br></blockquote><blockquote type="cite"><span> are huge numbers of smaller (unnamed) streams.</span><br></blockquote><blockquote type="cite"><span>It's not a bad idea, as it would let anybody needing water in the bush, know that there's a creek over there, & also let you know that if you go this way, you may get wet feet! :-)</span><br></blockquote><blockquote type="cite"><span>But, do DCS Base & Topo differentiate between permanent & intermittent creeks?</span><br></blockquote><blockquote type="cite"><span>Thanks</span><br></blockquote><blockquote type="cite"><span>Graeme</span><br></blockquote><span></span><br><span>_______________________________________________</span><br><span>Talk-au mailing list</span><br><span>Talk-au@openstreetmap.org</span><br><span>https://lists.openstreetmap.org/listinfo/talk-au</span><br></div></blockquote></body></html>