New answers tagged cache
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Tile packages are just normal zip files which contain the images in a "bundle" format along with metadata in more familiar formats.
The bundle format is proprietary and undocumented. Some details including initial code sample are available on the ArcGIS forums.
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As said the cache is only use for network accesses - probably most useful for tiles in WMS-C and WMTS, but also use for the capabilities of WMS, WCS, WFS and for SVGs in case they aren't local. It's created on demand - ie. only when a network reply should be save for later reuse.
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The cache directory at C:/Users/Russell/.qgis/cache/ is actually the WMS-C/WMTS cache as @jef has mentioned. That's why it's in the Network tab of the Options dialog along with the WMS search address and proxy settings.
The naming is unfortunate but it has nothing to do with the render caching which is used to speed up redraws and other common operations. ...
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Byte (see QNetworkDiskCache::setMaximumCacheSize).
The cache is mainly used for WMS-C/WMTS - so you're probably not using that.
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So I have been doing a brief reading on your question, and here is what I have found:
Yes you need to use both CacheRead & CacheWrite. Your browser will not automatically put the tiles in the Cache, unless you use CacheRead.
Please have a look at this sample: Offline Storage Example
When your tiles are updated, you can invalidate the cache by using ...
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