Pas sûrwebadev a dit:Google les reprend
Donc Mr Google recommande d’utiliser un programme automatique de MAJ et de soumission de sitemapsSitemaps FAQ a dit:How do I resubmit a Sitemap once it has changed?
Any time the URLs in your Sitemap have changed, or if you've updated the pages that are already listed, you can resubmit that Sitemap for re-crawling. Simply click the Resubmit link to the right of the appropriate Sitemap. The Submitted date will update to reflect this latest submission.
If you have set up an automated job to generate and submit Sitemaps on a regular basis (recommended), you don't need to use the resubmit link in your Google Sitemaps account. The Submitted column will continue to show the last time you manually clicked the link, but the Downloaded column will be updated to show the last time our system has fetched your Sitemap.