Generate map tiles

Generally speaking, GWC applies two methods for creating cached map tiles:

1. On-the-fly processing: If a GWC layer is primarily requested by a client, the appropriate map tiles are rendered and subsequently stored in the GWC data directory. The next client, requesting the same layer on the same location receives a (much faster) response from the cache.
2. Preprocessing of map tiles: The tiles of a layer will be preprocessed and stored in a defined bounding box and in defined zoom levels along the given gridset. In contrast to the on-the-fly calculation, this method requires, depending on the available system resources, significantly more computing time, but all clients will receive a direct response from the cache.

With the following steps we'll preprocess the tiles and start the so called Seeding job.

• Go to Tile Caching ❭ Tile Layers.
• Find the layer momo:countries and select Seed/Truncate.

• In the upcoming mask we can configure a GWC-task for seeding the layers countries. Here we can use the following configuration:
  • Number of tasks to use: 04
  • Type of operation: Reseed - regenerate all tiles (The option Seed - generate missing tiles would behave the same here as we haven't any cache present)
  • Grid Set: momo-4326
  • Format: image/png
  • Zoom start: 00
  • Zoom stop: 07

• Click Submit.
• In the same window the section List of currently executing tasks will be filled with the recent tasks and involves some basic informations about it.

• Depending on your system resources the seeding tasks should not cover more than a few minutes. Click Refresh list to see if the tasks are finished or not.