Knowing how to read a USGS topographical map is essential to successfully finding a ghost town. USGS topographical maps are useful because they show the terrain and lay of the land as well as feature like roads, structures and mines. As you read this, it would be helpful if you also had...
It's difficult to build buildings on a steep slope. Slope is the measure of the steepness of the land. Flat ground has a slope of zero. Even though the area is high in elevation, it's not part of the extreme elevations of the mountains, which still have snow on them. Some of the...
Adam Gribben, a Survey Tech and SUAS Pilot, assists Josh with the planning and flight missions. The first project is Spradley Farms, an 800-acre undeveloped site where the team will perform a pre-development flight to provide the necessary data for the customer, Graham Associates, Inc., to...
Professor Josiah Dwight Whitney of Harvard was tasked with the 1860 California State Geological Survey. He hired a variety of scientist and explorers to help, including William H Brewer, Charles F Hoffmann, William More Gabb and Clarence King. You may also know them as:Mount Brewer,Mount Hoffma...
The aforementioned dark, labeled lines are calledindex contours, because their purpose is to tell you an exact elevation at a precise point in space, allowing you to work outward, and thus upward or downward, from there. The associated elevations usually end in "0" for convenience, although ...
A topo map is an indispensable navigational tool, but only if you know how to read it. In this article, we'll teach you the basics.
A simple guide on how to read a topographic map and feel confident using it outside, with a 3d video demonstration.
The concept of contour lines to show different elevations on a map was developed by the French engineer J.L. Dupain-Triel in 1791. Although this method allowed the accurate depiction of land contours and elevations on a flat, two-dimensional map, it was not widely used until the mid-1800...
Here we show how major rivers can efficiently connect to the deep-sea, by analysing the longest runout sediment flows (of any type) yet measured in action on Earth. These seafloor turbidity currents originated from the Congo River-mouth, with one flow tr
U.S. Geological Survey image What’s important togeologists? For one thing,geologyis about the shape of the land—where the hills and valleys lie, the pattern of streams and angle of slopes, and so on. For that kind of detail about the land, you want a topographic or contour map, lik...