Hi,
please read my answers bellow:
On 03/08/2017 07:29 AM, kg_loveyou wrote:
Hi,
I'm confused with some questions.
1.what does the "xcount" and "ycount" mean?
I guess that by "xcount" and "ycount" you are referring to the
"rowRangeCount" and "columnRangeCount" properties.
As said in the documentation
(http://docs.geoserver.org/stable/en/user/community/gwc-sqlite/index.html):
The/templatePath/ property is used to control the granularity of the
database files (see section above).
Properties/rowRangeCount/ and/columnRangeCount/ will be used by the path
template to compute tile ranges.
These properties when used with path template terms "y" and "x" allow
you to control the maximum number of tiles per MBTiles file. The default
configuration and file template
({layer}/{grid}{format}{params}/{z}-{x}-{y}.sqlite) will make each
MBTiles contain at max 250*250 tiles. So file 20-0-250.sqlite will
contain tiles for zoom level 20, X tiles 0 to 250 and Y tiles 250 to 500.
2."In the previous example, tile
(z,x,y)=(15,3024,1534) would be stored in a file named
/path/to/g/mytileset/15/3000-1000.sqlite3 and tile (5,2,8) would be stored
in a file
named /path/to/g/mytileset/5/0-0.sqlite3. "-------The values for x and y
are greater than the corresponding values in the file name?
I don't know which values you used for "rowRangeCount" and
"columnRangeCount" but let's say you use 1000 thousand for both.
File '/path/to/g/mytileset/15/3000-1000.sqlite3' will contain X tiles
from 3000 to 4000 and Y tiles from 1000 to 2000. File
'/path/to/g/mytileset/5/0-0.sqlite3' will contain X tiles from
0 to 1000 and Y tiles from 0 to 1000. The range count is equal for both
X and Y in this case.
3.mbtiles is usually a single file.If I want to use this plugin , i have
to split it into several sqlite files?
You don't need to create several files, the path template just give you
options to control the granularity of the databases files. The MBTiles
specification
(https://github.com/mapbox/mbtiles-spec/blob/master/1.1/spec.md) defines
several restrictions regarding the content of the MBTiles files (one
layer per file, one image format per file, etc ..).
I don't know what you are trying to achieve (creating MBTiles files to
be consumed by another application ?), in this case your template could
look like this:
{layer}/{params}/{grid}/{format}/mbtiles.sqlite
Is up to you to define the path template that suits you the best, you
need to take in consideration your use case and performance requirements.
Hope it helps.
Regards,
Nuno Oliveira
--
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