Washington, D. C.: October 13, 1927 Heinz Gruner of the U. S. Geological Survey doing experimental trials of an aerocartograph to do topographic mapping with aerial images © Underwood Archives / The Image Works

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Title: Washington, D. C.: October 13, 1927 Heinz Gruner of the U. S. Geological Survey doing experimental trials of an aerocartograph to do topographic mapping with aerial images © Underwood Archives / The Image Works

Caption: Washington, D.C.: October 13, 1927 Heinz Gruner of the U.S. Geological Survey doing experimental trials of an aerocartograph to do topographic mapping with aerial images © Underwood Archives / The Image Works

Credit: Album / Universal Images Group

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Image size: 3894 × 5100 px | 56.8 MB

Print size: 33.0 × 43.2 cm | 1533.1 × 2007.9 in (300 dpi)

Keywords: 1 PERSON • 1035-701 • 1910S • 1920S • 1927 • ADULT • ADULTS • AEROCARTOGRAPH • ALCOHOL • ANALYZING • ATELIER • AUTOMOBILE • BEVERAGE • BEVERAGES • CARTOGRAPHY • CHAIR • CHAIRS • CLASS • COURSE • D. C. • DISCOVERY • DRINK • DRINKING • EDUCATING • EDUCATION • EDUCATION. • EEUU • ENGINEER • EXAMINING • EXPERIMENTING • EXPERTISE • FACTORIES • FACTORY • FOOD • FOODSTUFFS • HEINZ GRUNER • HISTORICAL • INDOORS • INDUSTRY • INSTRUCTING • INSTRUCTION • JOB • JOBS • LAND TRANSPORTATION • LESSON (SCHOOL) • LESSON • LOOKING • MACHINE • MACHINERY • MALE • MAN • MANUFACTURING • MAP MAKING • MAPPING • MASCULINE • MEAL • MEN • MID ADULT MALE • MID ADULT MAN • MID ADULT • OCCUPATION • OCCUPATIONS • OFFICE • ONE PERSON ONLY • ONE PERSON • PEDAGOGY • PERIOD • PROFESSION BERUFE OCCUPATION • PUPIL • PUPILS • RESEARCH • REVIEWING • SEATED • SINGLE PERSON • SIT DOWN • SIT • SITS • SITTING • SKILL • STOOL • STUDENT • STUDIO • STUDY • STUDYING • SURVEY ENGINEER • SURVEY • SURVEYING • TEACHING • TEACHING, EDUCATION • TECHNOLOGY • TRAINING • TRANSPORTATION • TWENTIES, THE • U S A • U. S. A • U. S. A. • U. S. GEOLOGICAL SURVEY • UNITED STATES AMERICA • UNITED STATES OF AMERICA • UNITED STATES • UPBRINGING • US-AMERICAN • USA • USA. UNITED STATES • USGS • VERTICAL LINES • VERTICAL • VINTAGE • WASHINGTON • WHEEL • WORKING • WORKS