Hi OsmAnd developers, I just wanted to highlight that the situation around hillshades has not changed in four years. The edges of hillshade tiles show weird artifacts, at least in my areas. I would love if that could once be fixed, at the best together with enhancing the hillshade detail.
Compare this example of OsmAnd hillshading <https://app.box.com/s/pdz4nibi3imn20uwuh3ww1gjpatomgcs> with what is possible based on swissALTI3D hillshading at map.geo.admin.ch <https://app.box.com/s/tqdjiu0sa0tx1buyaep44pcamymiptmd>. Of course, this is using too heavy files to store the hillshades of entire countries on the mobile device. If I lower the quality of the swissALTI3D hillshade <https://app.box.com/s/dqlo0lrkb3smx8hr5klq3hgmalwnr5z8> of this example to 1% of its quality <https://app.box.com/s/pojnul7ub20fcau7hp4xbnbfaxbayyb4>, the hillshade is still way more detailed than OsmAnd's hillshade. That 1% quality JPEG is 6.7 KB in size, for the area of 4.77 km * 2.17 km = 10.35 km2. To cover all 41,285 km2 of Switzerland 26.1 MB of that quality would be needed. This is less than the OsmAnd Switzerland hillshades currently weigh! They come as 46.6 MB. So, there is clear room for improvement. I would love to see this improving. Cheers Peter On Saturday, June 13, 2015 at 12:33:54 PM UTC+2, pps wrote: > > The hillshades used by OsmAnd show artifacts which appear to be issues at > the tile edges. Horizontal and vertical edges show the issues. It looks > like adjacent tiles do not have the same grey tone on the two tiles where > they meet. See the example screenshot > <https://dl.dropboxusercontent.com/u/22549375/Pics/Screenshot_2015-06-12-20-21-08.png> > . > > > > http://beta.map1.eu shows similar issues at tiles edges but it seems to > use larger tiles so that the edge quality issues appear less frequently. > Compare the spot from the OsmAnd screenshot with the same spot on > beta.map1.eu > <http://beta.map1.eu/#zoom=15&lat=47.36475&lon=8.92194&layers=BT>. > > > > However, http://www.opencyclemap.org/ with the Outdoors layer switched on > does not show such artifacts. > > > > Can better hillshade tiles be made available for OsmAnd? > -- 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/453b39c6-ba80-457b-9c60-c3370c4b6388%40googlegroups.com.
