Here's the section of my video discussing the "Show polygons" option in the Underlay map menu: https://youtu.be/Y_fekLfcUOc?t=772
On Wednesday, May 29, 2019 at 9:02:00 AM UTC-7, Bart Eisenberg wrote: > > QGIS is an open source GIS program that can be used to georeference maps > and, with some manipulation, make them available as layers in OsmAnd. > See Akkana Peck's discussion re: QGIS here > <http://shallowsky.com/blog/mapping/osmand-making-overlay-maps.html>, as > well as in posts on this forum here > <https://groups.google.com/forum/#!searchin/osmand/qgis/osmand/bG1SGGNYxYI/hAuVhJrCCAAJ>. > > The program MAPC2MAPC also provides this capability under the Windows OS. > My video on the topic is here > <https://www.youtube.com/watch?v=Y_fekLfcUOc>. > > Regarding using overlay vs. underlay: I think this is a matter of how you > want to combine the two layers for a composite view. In both cases, the > slider determines the transparency of the upper layer. If you use > underlay, the upper layer is the OpenStreetMap vector map, and setting > "Show polygons" on or off determines whether the raster map below shows > polygon-like objects (like lakes) without the vector map interfering. > Whereas with the overlay, the upper layer is a raster map, and no such > selection is possible. Hence in most cases, I think that the underlay map > the more useful to start with. > > On Tuesday, May 28, 2019 at 8:55:51 PM UTC-7, Luke wrote: >> >> I'm glad it works for you. >> What is the QGIS method? >> >> >> On Tuesday, May 28, 2019 at 5:23:26 PM UTC-7, Akkana Peck wrote: >>> >>> Luke writes: >>> > One feature that I had been missing from Osmand for a long time - and >>> > others in the US I'm sure would agree - is the ability to display the >>> land >>> > use areas and what areas are national forest/BLM/etc. >>> > I finally found a way to get it to download and show the public domain >>> BLM >>> > maps! The steps are documented here: >>> > >>> https://howtotrainyourrobot.com/adding-blm-land-use-maps-to-osmand-on-android/ >>> >>> > >>> > This is handy but I noticed that lakes seem to not show when BLM map >>> is the >>> > underlay. Perhaps a conflict, or a bug? >>> >>> Bart Eisenberg writes: >>> > In the Underlay menu, is Show polygons on? >>> >>> I just tried Luke's excellent tutorial. Thank you, Luke! It works >>> beautifully, and is a lot easier and more general than the QGIS method >>> I posted a few weeks ago. >>> >>> And I tried Bart's tip for reservoirs, which worked (thanks to you >>> too!) but only after some fiddling. By default, the underlay map has >>> Base Map Transparency of 100%, and if I turn on Show Polygons, I see >>> the base (offline vector) map, including reservoirs, but the BLM >>> land use map disappears. But if I set Base Map Transparency to 50% >>> *and* turn on Show Polygons, I can see both reservoir and land use. >>> I can also see both if I use it as an Overlay (which I guess always >>> shows polygons? It doesn't have an option for that) rather than an >>> Underlay map -- though the first time I tried it as an Overlay it >>> didn't show and I'm not sure why. >>> >>> Are there any arguments in favor of underlay vs. overlay, or are >>> they pretty much equivalent? >>> >>> I don't suppose there's an option to download map tiles only when >>> on wi-fi? I couldn't find anything like that in the Online Maps >>> Settings, though there is a checkbox where I could temporarily turn >>> off updates. >>> >>> ...Akkana >>> >> -- You received this message because you are subscribed to the Google Groups "Osmand" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/osmand/85b11e14-c259-42e8-8a01-3b6437a00335%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
