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Tilecache surround displaying as white in AGS Mobile (PDA version)

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12-15-2011 01:38 AM
AnthonyFarndon
Frequent Contributor
Hi All

Background:

We have generated a raster tilecache using ArcGIS Server for the Great Britain. The total size of this cache is too large to export and place onto mobile devices, so we have exported descrete areas of this cache into 100km squares.

The intention was if the field crews are working in a particular area, they copy the required 100km tile caches onto their pda sd card. If they are in an area that is near the bounds of the square, they would take 2, 3 ,4 squares etc depending on their needs and location.

Problem:

Although these exported tile caches work fine in ArcMap, Project Centre, Windows Mobile (tablet version), they all join seemlessley and display fine, in ArcGIS Mobile (pda version) there is a problem.

It seems that in pda mobile, the no data/surrounding area of the 100km tile is displayed as white rather than transparent. This means that only one tile cache will 'display' at any one time, because it white surround masks the neighbouring tile caches. Turn off the top most tile, and the next one displays, and so on. When you pan or zoom, initially you see all the rasters drawing from the bottom up, but get covered as the next one up renders.

Also, the full extent of these 100km tiles is not the visible raster data/extent that was exported, it seems to be the extent of the original server based cache.

Does anyone have a solution to this, is there a way to get pda mobile to display this no data surround as transparent or alter the extent of the tile cache exports?

Thanks in advance, tony
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