Group,

There's another new version of APRSISCE for Windows Mobile just posted to the Files section. I discovered a fairly serious resource consumption that causes Windows Mobile to run out of resources and lock up if you drive around at a low zoom level causing lots of OpenStreetMap files to paint. This resource leak has been fixed along with the following changes.

1) Reworked the APRS-IS network handling to improve responsiveness and reduce load on the device.

2) Double-clicking the "APRS OK" window no longer brings up a series of network devices, but instead shows traffic statistics for the APRS-IS connection including packets and bytes sent and received for this session.

3) Reworked where stations are painted on the OSM tiles. They weren't quite landing on streets at larger zoom levels. It uses the old way until all tiles have been filled in, so don't be alarmed if you see the stations "jump" right after the map completes. You should only see this the first time you're in an area while the OSM tiles are loading from the network instead of from the cache.

4) The OSM map is now clipped to the old circle and doesn't overflow around and behind the various other windows.

5) Double-clicking an empty space on the map will popup OpenStreetMap tile statistics if any tiles have been loaded in that session. Eventually, I hope to also show the status of the on-device cache of tiles by zoom level.

6) Increased the available zoom levels. On my 320x240 AT&T Tilt, I can now zoom out to 524 miles instead of the old 256.

7) Reworked how tiles are cached on CE. You might want to locate the OSMTiles folder (probably in the root of your device) and delete it and all files within it. The new caching layer uses directories that exactly mirror OSM's URLs.

8) To store the OSM cache on a Storage Card (assuming you have one), close APRSISCE and edit the APRSISCE.xml file that should have synced to your desktop. Locate the argument and set it to /Storage Card/OSMTiles/. Save the file and wait for it to sync back to your device before running APRSISCE. You should then see an OSMTiles folder on your Storage Card.

9) The OSM Tile Cache now prefetches tiles in anticipation of your movement or zooming. It fetchs one tile out in each ordinal direction from the screen along with all tiles one closer zoom below and one further zoom above.

10) While APRSISCE is fetching OSM tiles, you'll see a yellow circle expanding from the center of the map. Each jump is one tile. When it reaches the outer circle, it has worked off all queued prefetches. It prioritizes the queue, so it'll still get the missing visible tiles first.

Let me know what you think and let me know what you'd like to see enhanced and/or changed, especially if you encounter any bugs!

Lynn (D) - Author of APRSISCE - (APRS message me at KJ4ERJ-12)