Topographic Map: Voluntown Quadrangle
The entire 1:24,000-scale quadrangle, which includes the Yawgoog area, can be downloaded. Image editing software can be used to crop and print the map. The map is a zipped TIF file. (Rhode Island Geographic Information System - RIGIS)
Microsoft Research Maps
Free topographic maps and aerial photographs of any location in the USA, in various scales and sizes.
Estimated Value of Magnetic Declination
Provided by the National Geophysical Data Center (NGDC) of the National Oceanographic and Atmospheric Administration (NOAA). To use the calculator, the latitude, longitude and altitude of the location must be entered. A ZIP code locator in the calculator can find the approximate latitude and longitude. Coordinates can also be found for a given street address at MyGeoPosition.com. Please note that declination values on topographic maps may be decades old. As of 2013, magnetic north is 14.4 degrees west of true north in the Yawgoog area.