Started by Menion, January 03, 2019, 15:10:49
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Quote from: freischneider on January 03, 2019, 17:44:00Locus does not show all themes on V4 maps.
Quote from: menion on January 03, 2019, 16:50:47"Device screen scaling": I already read the post from Tobias, but I'm not too clever from this. What is the main issue he tries to describe except lack of interest in compatibility?
QuoteMapsforge maps are meant to be scaled to screen density of the device, so that a map at 160ppi looks exactly the same as with 480ppi. To do that, not only symbols and line width are scaled, but also map tile size. So if you have a map tile size of 256px at 160ppi, you get 768px at 480ppi.Locus uses a mod of a very old mapsforge version with no scaled tiles. So with modern devices with very high pixel density, you still get 256px like for devices years ago. The only thing that is scaled is line width and symbols. But as these grow larger (3x as large at 480ppi), the space on a 256px map tile gets more crowded, and less can be displayed. So when looking at the same zoom level, less and coarse information is shown.Here are some comparison of a densely mapped are at zoom level 17: At first, it looks as if Locus shows more - but this isn't the case, as the area is only larger as the tile sizes are smaller. The same area can achieved by OruxMaps by using the zoom button.Now here you can see what details are available if tile size is adjusted:In Locus, streets are rendered much too fat, so they overlap and swallow too much space. Only a few symbols are displayed, as most are eliminated because of too little space.So the scaling policy of OruxMaps is true to how the maps are meant to be displayed and can be scaled to every pixel density without loss of details. The only disadvantage is that with larger tile size direct comparison to online maps with old 256px tile size is not possible (although there are more HD maps coming with larger tile size as it's necessary to keep the legible on high density devices).
Quote from: menion on January 03, 2019, 21:52:13@Tobiasexcellent description I needed, thanks .About themes: Currently, all V3 maps use Locus-MapsForge rendering system, V4+ maps use than MapsForge 0.10.0. So what I may do: allow all V3 and higher themes for V4+ maps oki? I'll look at it.