Evening Republican, Volume 15, Number 111, Rensselaer, Jasper County, 10 May 1911 — A Mighty Atlas. [ARTICLE]

A Mighty Atlas.

More than one-third of the area of the United States has been surveyed and mapped by topographers of the United States geological survey in connection with the preparation of a detailed topographic atlas of the country. The maps are on a scale of about one inch to the mile, and the big atlas when completed will contain more than 8,000 sheets. Every year during the open field season the government topographers survey in very accurate detail from 25,000 to 30,000 square miles. During the winter the topographers prepare the sheets, which are later engraved In the survey’s engraving plant.