I am trying to create an URL which will set the blog post like ./wp-admin/post-new.php?post_title=title
I know that post_title, content and excerpt will work for this, but I don’t know how to set meta tags.
I need this to create a new posting when clicking on a map (openlayers) and automaticaly set longitude and latitude in meta tags.
I suppose, for auto-post-creating, you should dig XML-RPC interface first. This tool is not so hard to master and is very powerful.