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A joint venture involving the National Atlas programs in Canada (Natural Resources Canada), Mexico (Instituto Nacional de Estadística y Geografía), and the United States (U.S. Geological Survey), as well as the North American Commission for Environmental Cooperation, has led to the release (June 2004) of several new products: an updated paper map of North America, and its associated geospatial data sets and their metadata. These data sets are available online from each of the partner countries for download. The North American Atlas data are standardized geospatial data sets at 1:10,000,000 scale. A variety of basic data layers (e.g. roads, railroads, populated places, political boundaries, hydrography,...
Categories: Data;
Types: Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Rail transportation,
Railroad,
Railway,
Transportation,
infrastructure
Differential subsidence of the road bed of the standard gauge Copper River and Northwestern Railway near Strelna, 75 miles northeast of Valdez, Alaska. The thermal equilibrium of the fine grained sediments underlying the road bed was disrupted during construction, and the permafrost started to thaw differentially. Maintenance and use of the railroad was discontinued in 1938. Subsidence, as well as lateral displacement, has continued. September 1960. Figure 20, U.S. Geological Survey Professional paper 678.
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