Garmin Astro Topo Map - Central Canada - These NEW Garmin Astro Topo Maps of Central Canada will provide you with incredible detail when using the map view screen on your Astro. You will be able to see every road, whether it's dirt or paved, as long as it has a name or number. All bodies of water from the largest reservoirs to the smallest creeks that you can step across are shown. All elevation contour lines, power lines and pipelines, cities and town are shown as well. What we really like is you can see with a glance where your dog is located in reference to terrain and your location, making it easy to pinpoint them. When running hounds, the topo maps are essential as you can quickly determine where you need to be to ahead of the chase!