On Sun, Oct 20, 2019 at 12:54:40PM +0200, Dirk Stöcker wrote: > On Thu, 17 Oct 2019, Jiri Vlasak wrote: > > > there was Missing Maps hackathon this weekend in Pilsen, Czech Republic. > > One of > > the tasks we were working on was click building feature [1] -- building plot > > based on mouse click to the middle of the building. > > > > I am interested in getting background imagery in effective way. Currently, > > the > > following steps are used: > > 1. Mouse listener knows the coordinates. > > 2. Coordinates are recomputed to TileXY. > > 3. New tiles around the mouse click are created in array (9 of them). > > 4. Based on Tile URL, Images are downloaded and used for algorithm. > > > > I feel like downloading Tiles multiple times is not effective. > > I'd recommend the meachnism already included in JOSM, e.g. the Tile loader > classes which also do caching.
That's good point. I would like to use that, but I am lost in how does it work. Can you point me to the right direction, please? I feel like I miss something basic. I am able to get the current ImageryLayer but not the image. And the methods I think could work for me (like `getVisibleTileSet()`) are usually private. Thanks, jiri
