MOST SATELLITE IMAGE MAPS ARE PRINTED TO SIMULATE COLOR-INFRARED PHOTOGRAPHY BY COMBINING IMAGERY THAT WAS SCANNED IN RED, GREEN AND INFRARED WAVE LENGTHS OF LIGHT.

ON COLOR-INFRARED IMAGERY, GROWING CROPS, GRASSES AND WOODLANDS USUALLY APPEAR IN SHADES OF RED: CONIFER FORESTS IN SHADES OF REDDISH BROWN: CLEAR WATER AS DARK BLUE OR BLACK: TURBID WATER AS LIGHT BLUE OR GRAY: AND CULTURAL FEATURES SUCH AS CITIES AND HIGHWAYS AS STEELY BLUE-GRAY.

SATELLITE IMAGE MAPS ARE AVAILABLE FOR SELECTED AREAS IN ABOUT HALF OF THE STATES AND THE DISTRICT OF COLUMBIA AND SUCH AREAS AS ANTARTICA, THE BAHAMAS AND ICELAND. THEY ARE ALSO AVAILABLE FOR THE CONTERMINOUS UNITED STATES AS A NATIONAL ATLAS SHEET AND FOR THE ENTIRE STATES OF ARIZONA, FLORIDA GEORGIA, NEW JERSEY AND UTAH.

MANY IMAGE MAPS AT 1:250,000 SCALE HAVE TOPOGRAPHIC MAPS PRINTED ON THE REVERSE SIDES. EACH MAP IS IDENTIFIED BY ITS LATITUDE AND LONGITUDE AND IS GIVEN A DISTINCTIVE NAME, FOR EXAMPLE, " UPPER CHESAPEAKE BAY ". MAJOR WATER BODIES ARE USED FOR MAP NAMES WHEN APPROPRIATE BECAUSE THEY SHOW THE GREATEST CONTRAST AND ARE EASILY RECOGNIZED. IMAGE MAPS COVERING STANDARD 1:250,000-SCALE QUADRANGLE AREAS CARRY THE SAME NAME AS THE TOPOGRAPHIC MAP.

TO FIND OUT IF YOUR AREA OF INTEREST HAS MAP COVERAGE SIMPLY SCROLL DOWN TO OUR E-MAIL ADDRESS, CLICK ON IT AND SIMPLY TELL US WHERE.

REMEMBER: 1:24,000 SCALE IS 1 INCH=2000 FT. 1:250,000 SCALE IS 1 INCH=4 MILES