Figure 1. Arroyo Seco river maps, (a) Shows an estimation of its length measured by Google Maps tool; (b) Sample points enumerated from 1 to 11 and marked in Google Maps screenshot. 1 at 25.644377, -100.328755, 2 at 25.641689, -100.314972, 3 at 25.641165, -100.312228, 4 at 25.639355, -100.306084, 5 at 25.640616, -100.301948, 6 at 25.641883, -100.2938385, 7 at 25.644673, -100.283639, 8 at 25.648561, -100.278192, 9 at 25.652101, -100.273304, 10 at 25.653576, -100.271975, and 11 at 25.652479, -100.270110 (Río la Silla).
