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Students will "digitize" photographs of human faces using various grid sizes and shades of gray. Through this activity, they gain an understanding of image resolution and how much information is needed to answer various questions.This introductory activity introduces skills that are used to recognize and interpret remotely sensed images, such as aerial photos and satellite images. To complete the activity, educators reproduce 8"x10" head shots of students (or use magazine images), and need to create transparencies with grid squares of different sizes to overlay the photographs. This activity is part of the Ground Truth Studies Teacher Handbook, which provides more than 20 activities to build student understanding of global change and remote sensing, and includes background chapters for teachers, glossary, and appendices.
This resource is located on page 49 of the PDF document.