Playing arround with Google Hearth:
First Salto (34?17\'56.00\"S, 60?14\'31.00\"W)the town wen I live and the base of our ground crop dusting op. The fields with a red line arround are a farm called \"La Pialada\" some 168 Ha [415 acre] where I was working two days ago spreading some Round-Up+Atrazine in preparation for the incoming Maize sowing, in the left of this farm you can see a diagonal green patch, it\'s the Salto\'s airfield grass runway. Crossing the fields, its the 31th Route from Salto to Rojas. both cities are 50 Km [38 miles]. away, and if you wonder about, the thick black irregular line it\'s the same river.

Above is Rojas( 34?11\'43.00\"S, 60?44\'6.00\"W) The main base of our aerial crop dusting op. Also begining inside of the gray circle you can see the grass runway of the Rojas Airfield, and crossing it from west to east it\'s the 31th Route.

In both images the north is pointing up
Sorry my bad english.
Salu2.