The Poster API supports the HTTP POST method for submitting custom sector data for rendering. Three variations are supported:
http://www.travellermap.com/Poster.aspx
sector - sector name, URL encoded (required)scale - scale in pixels/parsec (default is 64)subsector - subsector index (A-P) (optional; if not specified, whole sector is rendered)rotation - rotate the image, 1 for 90° clockwise, 2 for 180°, 3 for 90° counterclockwiseoptions - rendering style optionsThis cannot be done through a Web page except via XmlHttpRequest, which doesn't make a distinct demo than the examples below. However, it is the simplest format for most HTTP clients to work with.