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TopoZone was one of the first topographic mapping site on the web, providing visitors with free viewing and printing of the full set of United States Geological Survey topographic maps covering the entire United States. The maps are produced by the USGS, which encourages the distribution of their maps through business partners.
The first geologic mapping of California began in 1826. [4] Interest in plotting California's landscapes increased when gold was discovered in 1848. [5] California quickly became a well-documented piece of the United States. Modern improvements to mapping technology, particularly GIS, have enabled every aspect of California to be recorded on a map.
Of the most prominent summits of California, only Mount Whitney exceeds 3000 meters (9843 feet) of topographic prominence. Five peaks exceed 2000 meters (6562 feet), nine peaks are ultra-prominent summits with more than 1500 meters (4921 feet), and 35 peaks exceed 1000 meters (3281 feet) of topographic prominence.
The following is a list of mountain passes and gaps in California.California is geographically diverse with numerous roads and railways traversing within its borders. In the middle of the U.S. state lies the California Central Valley, bounded by the coastal mountain ranges in the west, the Sierra Nevada to the east, the Cascade Range in the north and the Tehachapi Mountains in the south.
Due to the topographic features and proximity to the Pacific, southern California has its share of both low clouds and fog. [ 3 ] Coastal fogs are frequently generated by interaction between seasonal inversion layers and the coastal marine layer, and may reach as far inland as 20 miles, butting up against inland mountains or coastal mountain ...
Topographic maps are also commonly called contour maps or topo maps. In the United States, where the primary national series is organized by a strict 7.5-minute grid, they are often called or quads or quadrangles. Topographic maps conventionally show topography, or land contours, by means of contour lines.
TopoQuest is a free web mapping service built on open source software that provides internet-based topographic map for most of the United States.. The site is one of three internet services used by Wikipedia for providing topographic maps.