Sitemap is a tool that inform search engines about the structure of your site. By placing a sitemap on your website, you enable Search Engine crawlers (like Google) to find out what pages are present and which have recently changed, and to crawl your site accordingly. You don't have to manually submit sitemap as it automatically (if settings is enabled in the admincp) Notify Popular Search Engines (Google, Bing) when sitemap changes.
Location Filter has Profile Map Widget that you can add to your Members profile page to show, on the Google map, the location of the member. It will also allow you to see Route from your location to members location on the Google Map. Location Filter Allow members to search other Members within specified radius to their current location (e.g you can set within 20km).