My name is Will Pittenger. I have been making KMZ sets for Google Earth for a long time. After I starting making those, I wanted overlays for my sets. I was unsatisfied with the accuracy of the images available at Wikimedia Commons. So I started making my own with Inkscape and uploading them. Then I needed a place for anyone that liked my KMZ sets and/or maps to find others. For a while, a simple blog sufficed. But, once I started getting requests, I knew I needed something better. This site is the result. You are welcome to set up an account. Some activities are for registered users only. Take your time poking around and let me know what you think.
I had to manually edit all but one of them (Potrero de los Funes Circuit was OK). Please open the info boxes for each item and visit the first link under "You found this KMZ set". You will want to redownload them. I plan to get around this problem by hosting all future maps that have none-ASCII characters here until I get confirmation that Google has fixed this bug.
This time, I updated the KMZ. It now has lengths and the new maps as overlays. The old set also had links to the blogspot blog that is long gone. Instead, it now has a link to this post. You can get the KMZ here.
Mostly, I just used the new overlays. However, I also went through and made all paths and polygons thicker to make them easier to see. I also verified the location of everything. You can get the updated KMZ set here.
Those that have been with me long enough know that one of the first tracks I did was Bahrain International Circuit. But it recently came to light that I didn't have any overlays or maps for it. Now I have not one, but six of them. In fact, it now has folders for each layout, each with turns, an overlay, and a polygon for the track.