[mapguide-internals] RFC required for tile caching changes?

[Jason Birch]

Can I forward this to the "tiling" list for comment?
 

________________________________

From: mapguide-internals-bounces at lists.osgeo.org on behalf of Chris Claydon
Sent: Fri 2007-01-12 12:24 PM
To: MapGuide Internals Mail List
Subject: RE: [mapguide-internals] RFC required for tile caching changes?



A sample tile location would be as follows:

 

......\ Repositories\TileCache\Samples_Sheboygan_Maps_Sheboygan\7\Base Layer Group\R2\C3\3_4.png

 

The R and C indices correspond to rows and columns where each row contains 30 tiles vertically and each column contains 30 tiles horizontally.

 

This indicates that:

 

1)       We're at zoom level 7

2)       We're in grouped row 2

3)       We're in grouped column 3

4)       The tile location within this grouped row/column combination is (3,4).

 

The R and C indices never take a zero value (to avoid issues with negative values around the origin), so this tile corresponds to a location of (33, 64) in the old scheme.

 

I took a quick look at the Tile Map Service Specification, but it doesn't appear to support the concept of grouping blocks of tiles into subfolders in its current form. Can you provide more information on whether this is possible?

 

Chris.

 

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