A NDVI Analysis Contrasting Different Spectrum Data Methodologies Applied in Pasture Crops Previous Grazing - A Case Study from Ecuador - Cevallos LNM; Garcia JLR; Suarez BIA; Gonzalez CAL; Gonzalez IS; Campoverde JAY; Guzman JAM; Toulkeridis T (2018 5th International Conference On Edemocracy And Egovernment, Icedeg 2018, 2018)