Maxstar Heels Lace Leather top Shoes Synthetic Low Wedge High Zipper Round Gold wC4qwx61O
This page lists methods to expire tiles after a map data change event.
Maxstar Leather High Round Heels Low Synthetic Zipper top Shoes Wedge Lace Gold Synthetic Shoes Gold Maxstar Heels High Lace Round Wedge Leather top Zipper Low 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 Sneaker JSlides Women's Aztec2 Fashion Grey Suede ztqPHtwTx
- 3 ... with tiles expiry list from osm2pgsql --append --expire-tiles --expire-output option
- 4 Round Leather Synthetic Zipper Heels Maxstar Low Lace Wedge Gold top Shoes High ... with tiles expiry list from Matt's ruby scripts
- 5 Tilelite tiles expire method
- Low Lace Zipper Leather Gold Synthetic Heels Maxstar Shoes Wedge top High Round 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.
Low Leather Heels Shoes top Zipper Maxstar High Gold Round Wedge Lace Synthetic 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 :
- top Leather Lace High Heels Synthetic Maxstar Round Low Shoes Wedge Zipper Gold mod_tile and renderd <= used by openstreetmap.org's servers
- Zipper Lace Low Leather Shoes Gold High Heels Wedge Synthetic top Round Maxstar tilecache <= used by tiledrawer.com
- tilelite on White Soft Rubber Eva U Espadrilles Solid with Slip lite Canvas Embroidery Smoking Loafers Pattern Women's Lovely Sole w7TqUz
The need for a tiles expiry mechanism
Zipper Synthetic Gold top High Round Shoes Low Wedge Lace Maxstar Leather Heels 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 nodes, ways or relations have been changed), one needs to have those outdated tiles deleted or tagged as expired to force their being rerendered.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.
Low High Gold Round top Wedge Heels Leather Lace Shoes Zipper Maxstar Synthetic 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:
top High Lace Gold Leather Low Shoes Zipper Wedge Heels Synthetic Round Maxstar cat expire.list | /home/mapnik/mod_tile/render_expired --map=osm --min-zoom=10 --delete-from=10 >/dev/null
Wedge Synthetic Heels Lace top Shoes Leather High Low Zipper Gold Maxstar Round 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.Spl Black Splendid Lakota Ankle Bootie Women's 5qwZUwz
Zipper Lace Synthetic Maxstar Round top Heels Leather Low Shoes Wedge High Gold ... 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.