<div dir="ltr"><div dir="ltr"><div>Adam,</div><div><br></div><div>Many thanks to you. The video was well done and quite interesting. I started using the techniques you described immediately and it has made my life incredibly easier. I had just completed the addition of a huge wood multipolygon to Shuyak Island using my old method yesterday. Then today I created many multipolygons on a portion of Kodiak National Wildlife Refuge, Ban Island, using them for woods, wetlands, and then joining 19 sections of coastline, lagoon, and wood to make the refuge boundary. Awesome. The Relation Toolbox makes constructing a complex multipolygon from scratch a snap. Some of the ways I created are shared by 3 or more relations. <br></div><div><br></div><div>Highly recommended for anyone using relations in any form!<br></div><div><br></div><div>Take a look at my first effort with your coaching:<br></div><div>Relation: Ban Island (4253551)<br>Relation: Kodiak National Wildlife Refuge (8841597)</div><div><br></div><div>Dave<br></div></div></div><br><div class="gmail_quote"><div dir="ltr">On Mon, Oct 22, 2018 at 11:35 PM Adam Franco <<a href="mailto:adamfranco@gmail.com">adamfranco@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div>Hi Dave, all,</div><div><br></div><div>Based on this discussion I just recorded <a href="https://youtu.be/x7SPb0JtheA" target="_blank">this short tutorial</a> of how I use JOSM and its Relation Toolbox plugin to to add adjoining land-cover areas as multipolygons with shared boundary ways to reduce duplication and overlapping ways. <br><br>The area I'm editing, is replete with examples of this type of mapping: <a href="https://www.openstreetmap.org/#map=14/44.0199/-73.1530" target="_blank">https://www.openstreetmap.org/#map=14/44.0199/-73.1530</a><br><br>The tools used are:<br>* JOSM editor - <a href="https://josm.openstreetmap.de/" target="_blank">https://josm.openstreetmap.de/</a><br>* "Relation Toolbox" JOSM plugin - <a href="https://wiki.openstreetmap.org/wiki/JOSM/Plugins/Relation_Toolbox" target="_blank">https://wiki.openstreetmap.org/wiki/JOSM/Plugins/Relation_Toolbox</a><br><br>Documentation on MultiPolygons in the OSM wiki:<br>* <a href="https://wiki.openstreetmap.org/wiki/Multipolygon_Examples" target="_blank">https://wiki.openstreetmap.org/wiki/Multipolygon_Examples</a><br>* <a href="https://wiki.openstreetmap.org/wiki/Relation:multipolygon" target="_blank">https://wiki.openstreetmap.org/wiki/Relation:multipolygon</a><br></div><div><br></div><div>For some reason I've gotten hooked on mapping landcover in my area and spend a lot of time adding multipolygons to do so. I find them vastly easier to manage, update, and fix than simple closed ways with overlapping edges (how I started). As I show in the video, adding detail usually just means splitting exiting ways and adding/subtracting using the Relation Toolbox.<br><br></div><div>Hope this helps someone -- let me know if there are particular cases or questions and I'd be happy to record another video covering other situations.</div><div><br></div><div>Best,<br></div><div>Adam<br></div></div></div><br><div class="gmail_quote"><div dir="ltr">On Mon, Oct 22, 2018 at 8:47 AM Paul Allen <<a href="mailto:pla16021@gmail.com" target="_blank">pla16021@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">On Mon, Oct 22, 2018 at 5:27 AM Dave Swarthout <<a href="mailto:daveswarthout@gmail.com" target="_blank">daveswarthout@gmail.com</a>> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div dir="ltr"><br><div>Great. But what are you actually doing when you "sort the members" of a relation? And after sorting, how does one "ensure the members are connected"?</div></div></div></blockquote><div><br></div><div>Sorting something like a bus route ensures that the various ways that constitute it are connected</div><div>nose-to-tail. This is what "ensures the members are connected" and ensures they are connected</div><div>in a sensible fashion. Sorta. It may not do a good job if the route traverses the same way in the</div><div>same direction more than once.<br></div><div><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>I've noted with dismay the lack of debugging support for relations. For example, I will get an error message when trying to upload an edited relation but when I ask JOSM to Zoom to the error, the display zooms out enough to include the entire relation with no clue as the where the actual problem is. Same thing when you ask to "jump to the next gap". Good luck on that also. Maybe it's just me?<br></div></blockquote><div><br></div><div>Nope, it's not just you. I too have problems getting my head around JOSM. I use it when I have to,</div><div>to merge or split areas (such as when I find out that a large forest that somebody else mapped</div><div>has two named chunks). It's probable I find it hard to use because I don't use it enough, which means</div><div>I don't use it much, which means... But I also have to admit that I find Java programs in general are</div><div>not a good fit with how my mind expects things to work and they all give me a steeper learning curve</div><div>than non-Java programs. Which means I try not to use them much, which means...<br></div><div><br></div></div><div class="gmail_quote">-- <br></div><div class="gmail_quote">Paul</div><div class="gmail_quote"><br></div></div>
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</blockquote></div><br clear="all"><br>-- <br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr">Dave Swarthout<br>Homer, Alaska<br>Chiang Mai, Thailand<br>Travel Blog at <a href="http://dswarthout.blogspot.com" target="_blank">http://dswarthout.blogspot.com</a></div></div>