mapcache_seed1mapcache_seedgenerate tiles to seed mapcachemapcache_seed/path/to/mapcache.xmloptionsDESCRIPTIONmapcache_seed is an advanced seeding tool for mapcache, whose main features are:
configurable number of seeding threads, to speed up the renderingability to reseed tiles older than a certain timestampability to seed tiles given a shapefile/OGR datasourceOPTIONSfilePath to the mapcache.xml configuration file that contains the tilesets that need to be seeded.overrideOverride cache used by selected tileset (useful for selectively seeding fallback/multitier caches).nameName of the tileset that must be seeded.nameName of the grid that must be seeded (the selected tileset must reference the given grid).minzoom,maxzoom(Optional) Start and end zoom levels that must be seeded, separated by a comma, e.g. 0,6.width,heightOverride metatile size while seeding, e.g. 8,8.minx,miny,maxx,maxy(Optional) Bounding box of the area to seed.timestamp|now
(Optional) Only seed tiles that are older than the given value.
The value can either be the string "now", or a date formatted
like year/month/day hour:minute, e.g.: "2011/01/31 20:45".
(Note that a full timestamp should be quoted).
number
Number of parallel threads that should be used to request
tiles from the WMS source. The default is 1, but can be set higher
if the WMS server can withstand parallel requests (as a rule of thumb,
the value chosen here should never be much higher than the number
of cpus on the WMS server). (Incompatible with
/).
number
Number of parallel processes that should be used to request
tiles from the WMS source. (Incompatible with
/).
numberPercent of failed requests allowed from the last 1000 before we abort (default: 1%, set to 0 to abort on first error).fileLog failed tiles to file.fileRtry failed requests logged to file by .seed|delete|transferMode the utility will be running in: either seed (default), delete or transfer.tilesetName of tileset to transfer.DIMENSION=VALUE
Used to specify which dimension to use if the tileset supports
dimensions. Can be used multiple times to set multiple
dimensions, e.g. "DIM1=VAL1"
"DIM2=VAL2".
Show help.Don't print progress messages to the standard output.Force tile recreation even if it already exists.Print verbose debugging info (if compiled in).Optional Commandline options when using OGR/GEOS
At compile time, if OGR and GEOS where found on the system, the seeder
tool supports additional options to seed only the tiles that cover an
arbitrary geographical area.
Important: Note that for the time being, the OGR
datasource should be in the same projection as the grid you are seeding,
as there is no automatic reprojection from the datasource projection to
the grid projection.
datasource
OGR connection to the spatial source. Consult the OGR documentation
for all that is supported. In the simplest case (e.g. a Shapefile),
this is just the full filename of the shapefile.
layer
(Optional) For datasources that contain multiple layers (e.g. postgis,
with multiple tables), determines which layer will be used.
SQLOGR sql expression that can be applied (see http://www.gdal.org/ogr/ogr_sql.html).where
SQL "where" expression to filter out returned values. This would
typically be used to select only the geometry of a given country
if the datasource contains all the world contours.
NOTES
The seeding utility must be run under the same user account as the user
running the webserver. This is required so the permissions on the tiles
created by the seeder are accessible by the webserver, and conversely so
the seeder has the rights to write files to directories created by the
webserver.
A sample seeding session goes like this:
[user@host]$ sudo www-data
[www-data@host]$ mapcache_seed -c /path/to/www/conf/mapcache.xml [options]
[www-data@host]$ logout
[user@host]$
EXAMPLESeed the "osm" tileset with the "g"(google/web-mercator) grid:
mapcache_seed -c mapcache.xml -t osm -g g
Seed levels 0 through 12:
mapcache_seed -c mapcache.xml -t osm -g g -z 0,12
Given a shapefile that contains the world country contours, seed only
the areas that are covered by land (i.e. skip the oceans). Also use 4
request threads in parallel:
mapcache_seed -c mapcache.xml -t osm -g g -z 0,12 -n 4 -d /path/to/seed.shp
Same as beforehand, but only seed the USA (notice the quote usage,
required to create valid sql with a single-quoted 'US':
mapcache_seed -c mapcache.xml -t osm -g g -z 0,12 -n 4 -d /path/to/seed.shp -w "FIPS_A2='US'"
Reseed levels 0 to 12 (this could also be done by deleting the cache for
levels 0 to 12 and doing a classic seed, but doing so this way does not
slow down the access from web clients):
mapcache_seed -c mapcache.xml -t osm -g g -z 0,12 -o now