I can understand your motivation for wanting to make the tiles bigger.
You can set the tile size using the command line options
--tilewidth=512 --tileheight=512
The problem with creating different size tiles, is that the number
system gets altered,
so you have to re-enumerate all the files to match the expected numbers.
If such a number matching system is produced (not too difficult),
you would need access to the filesystem to rename the files.
If you manage to get something working, I would be happy to
include it in MgCooker.
It would have to be an option, as MgCooker is capable of running
with only http access, and I would like to retain that possibility.
Regards, Kenneth Skovhede, GEOGRAF A/S
Bruno Scott skrev:
Motivation:
We are using tiling, with the little patch we made for httptiling
Displaying is incredely fast, and it is using the client browser cache.
The real problem now is to pre generate all tiles.
For scale 1000 there is 3425920 256x256 tiles
With the previous MgCooker(3706) we had a average of 3 tile / sec so 13 days
for processing a single scale
With MgCooker(3911) using 2 simultaneous process is almost twice as fast so
we are aroud 7 days
We have 15 scales to process
We have to refresh the tiles every 30 days.
Full processing is still more than 30 days.
Here an idea, why not try to make Mapguide generate bigger tiles and split
them in a post process
Here is some interesting bench we made using the old 3706 mgcooker (single
process)
1024x1024 Tiles:
32h for 214120 tiles
1.85 tiles(1024)/sec ~= 29.6 tiles(256)/sec
2048x2048 Tiles:
18h30 for 54180 tiles
0.81 tiles(2048) /sec ~= 52 tiles(256) /sec
3072x3072 Tiles:
14h50 for 24192 tuiles
0.45 tiles(3072) /sec ~= 65 tiles(256) /sec
I've made a little aspx program using GD to bench tile splitting
Splitting a 1024x1024 tile : 0.218 sec
0.0136 sec per 256x256 tile
Splitting a 2048 x2048 tile : 0.691 sec
0.0108 sec per 256x256 tile
Splitting a 3072x3072 tile : 1.804 sec
0.0125 sec per 256x256 tile
So it's around 4 days of post process, i'm trying to make it faster
Bruno
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