Lady Sabre and the Pirates of the Ineffable Aether

This is simply a delicious treat of a webcomic that has been running for just less than a year now.  Lady Sabre and the Pirates of the ineffable Aether by Greg Rucka and Rick Burchett (note the map in the background of their drawing/photo).  The story is in a decidedly Steampunk style that has very Old West, if not "WIld, Wild, West", elements. The plot has so far focused on the acquisition of a prophetic map (because what's a proper pirate tale without a treasure map... of sorts), which will very likely play a key role in much of the rest of the story.  Here's the episode with the money-shot of the map:

Here's where she begins the explanation of the power of the map:

Note the fun cartographic elements in the form of the globe in the heroine-captain's cabin... but that's not Earth, and with floating islands of land and flying, hyperspace-travelling sailing ships, this is a very different place than where we live:

I'd suggest starting at the beginning of the story and enjoying the whole thing. Avast mateys! Map-based Webcomic Ho!