Directionally impaired Mac users will be relieved to learn of the release of GPSy 3.0, Karen Nakamura's software for working with data from Global Positioning System (GPS) satellites. With a GPS receiver, a Macintosh, and GPSy, you can pinpoint your location to within 100 meters anywhere on Earth (the GPS system is capable tracking to one sixteenth of an inch, but that capability is reserved for use by the U.S. military; see Karen's article "Feeling Lost? An Overview of Global Positioning Systems," and a review, "Driving Through Trees: Using GPSy," in TidBITS 388). In addition to numerous protocol additions for working with a wide variety of GPS units, GPSy 3.0 adds the ability to view your position using information from several Internet map servers, such as the U.S. Census TIGER Mapping Service and Geocities. GPSy is $50 and available as a 1 MB download.
Sleep (and Lock) Your Screen
When you are walking away from your computer, it's fairly common practice to start your screen saver and lock your screen. But did you know that there is a built-in keyboard shortcut in Mac OS X to sleep the screen?
Press Control-Shift-Eject and your monitor sleeps without engaging the screen saver.
- Driving Through Trees: Using GPSy (14 Jul 97)
- Feeling Lost? An Overview of Global Positioning Systems (14 Jul 97)