Wind breaks, outlining the main farm house and often much of the outlying buildings, make these features quite easy to pick out. Field size and crop yield are often calculated from satellite imagery for purposes of crop management, insurance and marketing. The darker fields in the imagery represent areas still under crop, pasture or grass lands. Most of the area has been harvested, which is not surprising as the imagery was acquired on September 5. When the Canadian Prairies were surveyed for settlement, a 1 mile grid design was used.
Full sections are one mile on each side.
Thus distance is very easy to measure.