During 2007, a sampling campaign was conducted in grassland and shrubland areas in the states of Jalisco, Estado de M?xico, Zacatecas, Coahuila, Durango and Quer?taro, using multispectral radiometers in field conditions, in order to obtain information to analyze the relationship between vegetation reflectance obtained by using optical sensors with aerial cover and biomass production. Additionally, digital photographs were taken to estimate aerial...