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In this activity, students produce a land cover map of a 15 km x 15 km GLOBE study site from hard copies of Landsat satellite images. Students place clear transparencies over the Landsat TM images and use markers to outline and classify areas of different land cover using the MUC System. Students use their local expertise of their GLOBE study site and their sample site measurements to create and assess the accuracy of their maps. The resource includes a sample Landsat image, an example of an accuracy assessment work sheet, and a difference-error matrix to validate the degree of accuracy of the student product. This resource is a procedural tutorial supporting the protocol within the Land Cover/Biology chapter of the GLOBE Teacher's Guide.