Thumbnails

Thumbnail Generator

Sometimes SIDRE resources do not have an image or the images are very large and therefore cause unnecessary overhead when rendering a preview image in the frontend.

For this reason there is a small tool that allows to provide thumbnails in a uniform format for each SIDRE resource. The tool first converts the images from the image property of each resource into a uniform wepb-image, if the field is set. If the field is not set, then the tool tries to create a html preview image of the resource (using an existing splash service). The SIDRE frontend rendering will then use these thumbnails if they exist - fallback is the image URL.

To activate this feature, set search_index_features_generate_thumbnails to true and set the URL to your splash-service in thumbnail_splash_base_url.

The creation of thumbnails is cron controlled. There is a cron entry for incremental creation (existing thumbnails are kept) - intended for daily execution. Then there is another cron entry for the complete creation (existing thumbnails are overwritten) - intended for weekly execution.