Garmin is just beginning to ship pre-programmed memory cards that feature the most detailed topographic data ever offered. TOPO U.S. 24k offers significantly more detail than that offered in the extremely popular TOPO U.S. 2008 products. Simply insert the card into a compatible Garmin GPS unit and see detail based on USGS 1:24,000 scale topographic maps. Two regions are now available - Northwest (OR & WA) and West (CA & NV.) Other regions are in development and should be available in the coming months.
Garmin has not announced any plans to make this product available on DVD. This means that you will be unable to view, plan and print the same data using your personal computer. Nor will you be able to easily combine the 24k data with other Garmin maps such as City Navigator on to the same memory card. This means that TOPO U.S. 2008 in DVD form remains highly desirable for those interested in planning, viewing or printing using their home PC.
The image at right is a screen shot of TOPO U.S. 24k map data displayed on a Garmin Colorado. Unlike other currently available Garmin units, the Colorado has the ability to display maps with the terrain shading you see here.
