Latest Contributions by MichalStolba

I need to create large number (hundreds) of custom ImageTiledLayer layers which use locally stored tiles. It works fine on desktop (Linux) and Android, but crashes on iOS. It turned out, that the cause of the crash is that the app has too many open file handles, as on iOS the limit is typically fairly low (e.g., 256). The app crashes when opening around 190 layers. I have a couple of questions: - Can anyone confirm this is really the case? Is the ImageTiledLayer keeping open file handlers? - If so, can we somehow determine how many? Is it one per tile, or one per layer? - Also is there any way how to force the layer to close the file handlers after loading the tiles? Best Regards, Michal Stolba ... View more

Hi, I am using ImageTiledLayer to display raster tiles stored in local filesystem. All works fine. Now sometimes I need to download only some tiles (still fine) and for the tiles which are not in the filesystem show some "No Data" tile. I tired the following approaches: 1. Set noDataTileBehavior : Enums.NoDataTileBehaviorShow This has no effect at all. I suspect I need to provide a special NoData tile but I don't know how to get it and how to tell the layer about it. When the provided file is simply no there, the tile is empty. 2. Check file existence and if the file does not exist provide my own special No Data tile. This would be good as I could customize the tile. But! The tileCallback function does not pass beyond the file existence check! No error, no logging afterwards. I have tried both pure JS way and Qt way. No success. Is there any working way to achieve what I am trying to do? Thanks in advance for any help! ... View more

Dear all, I am implementing a custom tile layer using ServiceImageTiledLayer because of some custom tile parameters we need to take into account. The problem is that when I incorporate the new parameters into the tile URL in tileUrlCallback, the tiles are already cached and thus does not update (if I zoom in or pan to a new area, the tiles are loaded with the correct new parameters). Is there a way to reload the whole layer? Or is there a way to disable the cache so that ServiceImageTiledLayer is requesting the tiles always again? I was thinking about setting the cache size to 0, but I cannot find how. I only found the "esri.mapping.cache.disk.size" of the Esri QLocation plugin, but I am not using the plugin, I am using the ArcGIS Runtime. Is there a way to set this (or similar) property? Any help would be greatly appreciated, best, Michal ... View more

I am trying to export vector tiles (.vtpk) for offline use, preferably from https://www.arcgis.com/home/item.html?id=f42ec2699c7d4819bbbe60eca31b6b3e  or even better the vector variant of Light Gray Canvas (I would even like to do some edits to the map or add my own style). I am trying to do it via ArcGIS Pro, but regardless of what I try, I get Error 00102 "Map does not contain a required layer type for web vector tile layer" What am I doing wrong? Or could you suggest some other way to do the desired task? I have also tried Tile Package Kreator but id does not seem to support vector tiles. ... View more