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Mapping America From Lewis and Clark to the USGS

Mapping and Lewis and Clark

Many of the rare maps that shaped the plans of Jefferson and Lewis and Clark have been preserved. This web site presents some of those maps, the map Clark produced after his journey, as well as a mapping timeline from the 18th to the 21st centuries.

Modern Mapping in the USGS

Picture of a modern map.With today's computer technology, maps are available to everyone and they are easy to create and update.

The National Atlas

The National Atlas Web SiteThe National Atlas of the United States includes five distinct products and services. In addition to providing high-quality, small-scale maps, the Atlas includes authoritative national geospatial and geostatistical data sets. Examples of digital geospatial data include soils, county boundaries, volcanoes, and watersheds. Crime patterns, population distribution, and incidence of disease are examples of geostatistical data. This information is tied to specific geographic areas and is categorized and indexed using different methods, such as county, State, and zip code boundaries or geographic coordinates like latitude and longitude. These data are collected and integrated to a consistent set of standards for reliability.

The National Map

Composite image of various data layers covering the western suburbs of Denver, ColoradoMeriwether Lewis and William Clark gained their first knowledge about the topography of the West from Indians and traders. They used and drew maps on animal skins and sketches in the dirt. Today's explorers, scientists, educators, students, and the general public have it much easier. With the arrival of The National Map, users will be able to "travel" up and down the Lewis and Clark Trail via an updated, seamless map on the Internet. They will also be able to explore the rest of the country in the same way.

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