NO FEED REDIRECTION
If you haven't enabled feed redirection, then you won't have hard time submitting a sitemap. What you will need to do is just go to Google Webmaster and click Sitemaps on the left sidebar. This is assuming you already have logged in to Google of course. This is followed by clicking Add Sitemap and then choose Add General Web Sitemap in the Choose Type drop-down option. Once done, you just have to affix atom.xml or rss.xml (or both, but key them one after the other) on the blank space provided so that the whole sitemap URL looks like one of these.
Of course, the yourblog is already provided in the site.
FOR REDIRECTED FEEDS
The codes to be affixed for Blogger blogs that have their feeds redirected is atom.xml?redirect=false or rss.xml?redirect=false. Well, either will work. This will keep the feed from redirecting and is now usable as a sitemap at GWT.
You need to figure out how many published posts there are in your blog. Currently, Blogger limits max-results to 500 entries, although this may sometimes go up and down. There are times in which it would only allow 100. It really varies.
Supposing today if you made another sitemap and Google Webmaster allows only 100 entries, you need to copy the code below. (You can change 100 to your number of posts if Google Webmaster today allows more than that.)
If you have added the code above as sitemap, and then your posts are over 100 and GWT only allowed 100 entries per sitemap, then the code below will be of help.
If you noticed, the difference lies between the start-index. The first code is =1 and the second is =101. The first sitemap started at 1 and returned 100 results, the second sitemap uses the start-index of 101 (100+1). This will automatically cover your next 100 posts (so 200 now all in all). But if you had more than 200 posts, you should re-create another sitemap with the start-index of 201. You get the drift?
Although adding a sitemap might help your blog, Google will still probably crawl Blogger blogs even without a sitemap of any kind as Blogger blogs are not difficult to crawl. But compared to nothing, having a sitemap will really eventually help. Adding one or two won't hurt you anyway.
Here's a screenshot of Blogger-Aid's sitemap. Just click it to enlarge.
Labels: how to's