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Geooh Support Forum
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Topic: Offline Maps
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March 03, 2017, 07:32:49 AM
Geooh has used vector-based maps for many years... something other Android geocaching apps do not. Geooh also introduces a unique "preloaded maps" option. Let's discuss this...
Offline maps has been a hot topic. Apps like the Groundspeak app automatically downloads trail maps for each offline list. Other Android and iOS apps allow you to download offline maps from different providers. What's wrong with this? Well, unless you have a phone with LOTS of unused storage (gigs) and don't mind switching to different maps each with their own look when offline,... then nothing. But that seems wasteful and cumbersome. Some phones just don't have the free storage for rare instances of offline map needs. Plus, there is extra maintenance on your part to manage those maps and remove them if no longer needed... or they need to be updated with new roads.
How does Geooh do it? Google maps is one the top providers with an extensive collection of maps tiles that are updated daily. On Android, the map tiles are dynamically stored on the phone after showing a map section and retained in a local cache so when displaying that map location again it will use the cached tiles instead of pulling them down from the network. Since they are vector based the stored map can show several zoom levels of each location. When the cache gets large the least used tiles are purged by Android. Very efficient and rarely have we had a map display problem when using Geooh in poor cell reception areas... but it can happen.
So instead of wasting space on your phone with large map downloads for the rare times you may need them, Geooh can preload the map cache for geocaches in a list. You do this by running the Preload Maps task from the popdown menu in the upper right corner of the map. This action will then cause the map to visit each of the cache locations and zoom in/out at each so the map tiles are preloaded in the map cache. You only download for areas needed and they are purged automatically when no longer needed. No need to manage the megs and megs of offline map tiles. This is smart offline maps!
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