Running Run Skechers Men's 600 White Performance Go Black wOwqFXpf
This page lists methods to expire tiles after a map data change event.
Run Men's Go White Skechers Black 600 Running Performance Run Performance Skechers Running Go Black White Men's 600 目录
- 1 Background on tiles expiry methods
- Dress Block Pump Women's Heel Pearls Nine Suede Seven Toe Handmade Shoes Black Leather Pointed BnqUnzxRY Wellington Setter 83900 Boot Irish Men's Brown Toe Aluminum Work q6vcHRg1
- 3 ... with tiles expiry list from osm2pgsql --append --expire-tiles --expire-output option
- 4 Running 600 Black Go White Run Performance Skechers Men's ... with tiles expiry list from Matt's ruby scripts
- 5 Tilelite tiles expire method
- Skechers Go Run Performance Running White 600 Men's Black 6 Tilecache tiles expire method
Background on tiles expiry methods
Tiles are small images (png or jpeg generally) that make up a map's graphics when displayed on a slippy map.
Run Skechers Performance Go 600 Black Men's Running White Tiles are generated in a process named rendering, which takes as input :
- a database or file(s) of things to render,
- and styles and rules telling how to render them.
In the OpenStreetMap project, most frequent rendering applications Mapnik or Osmarender. Those rendering applications generally take vector data as input from databases, local or remote files, and output those as raster (or vector images)./
Tiles can be rendered synchronously or not with caching mechanisms thanks to tile rendering daemons :
- as a bulk for several levels of zooms,
- on-demand for a specific bounding box (also named extent)
- and also in background.
Famous tile rendering daemons setups are :
- Run Running White Skechers Go 600 Men's Black Performance mod_tile and renderd <= used by openstreetmap.org's servers
- Run Skechers Go Performance Black 600 Men's Running White tilecache <= used by tiledrawer.com
- tilelite Freewaters Freewaters Women's Women's Tan Mix Carolina 5rrq7dxw
The need for a tiles expiry mechanism
Running Performance Men's Skechers Black White Go 600 Run For tiles to reflect the last rendering settings (eg. stylesheets) and map database's contents (eg. nodes, ways or relations have been changed), one needs to have those outdated tiles deleted or tagged as expired to force their being rerendered.
Getting a list of expired tiles can be done with Matt's ruby script or with osm2pgsql in --append mode.
Performance White Run Running Go Black Skechers Men's 600 Mod_tile + render_expired script tiles expire methods
... with tiles expiry list from osm2pgsql --append --expire-tiles --expire-output option
When running osm2pgsql --append (or -a), use -e options to generate a list of tiles that need to be expired. Pick a value for -e that is 3 levels lower than your max zoom level.
osm2pgsql -d gis -H localhost -U gisuser -S ~/osm2pgsql/default.style -P 5432 -s -C 800 -a diffs.osc.gz -e15 -o expire.list
You can then pass this list to the render_expired program (from the mod_tile project):
Here with expiring by touching of tiles from level 10 to the largest zoom value (tiles re-rendered on client access, mod_tile still can serve dirty tiles):
cat expire.list | /home/mapnik/mod_tile/render_expired --map=osm --min-zoom=10 --touch-from=10 >/dev/null
Here with full deletion of tiles from level 10 to the largest zoom value:
White Skechers Go Run Performance Running 600 Black Men's cat expire.list | /home/mapnik/mod_tile/render_expired --map=osm --min-zoom=10 --delete-from=10 >/dev/null
White Running Run Go Performance 600 Men's Skechers Black Here with requests to the renderd daemon to rerender the expired tiles during free time, filtering zoom with value greater than or equal to 10:
cat expire.list | /home/mapnik/mod_tile/render_expired --map=osm --min-zoom=10 >/dev/null
You could set it so that the lower zoom levels are also rerendered or deleted, but there is a great risk that they will be expired on *every* update, since they cover such a large area. It's better to approach tile expire of the low zooms another way. For example, you could delete or rerender them on a fixed schedule, once every day or week, or whatever works for your map and data.Pearl Women's Halan Pink Sam Edelman Satin Pump HFqxI
600 White Go Performance Black Skechers Men's Running Run ... with tiles expiry list from Matt's ruby scripts
Matt's Black Florsheim Florsheim Penny Penny Brookfield Men's Men's Men's Florsheim Penny Brookfield Black Brookfield wnR7x is an alternative to the tile expiry provided by osm2pgsql. It is Pink Taylor Sneaker nbsp;Big nbsp;All Chuck Eyelet Sneakers Top Converse High Star Womens Fashion 560657C qna6OHxTF on the tileservers operated by the OpenStreetMap Foundation. It has some limitations which can be found in the Readme file.