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Goyders Line

Mannanarie is a small settlement situated about 200 kilometres north of Adelaide, South Australia, between the townships of Jamestown and Peterborough.Although most towns originated at around the same time, technological and societal advances have meant that some towns have outgrown others, and some have flourished while others have died. People have become prepared to travel further for goods and services, resulting in this decline in the need for towns.
Between Mannanarie and Jamestown is a range of hills which divides two catchment areas. To the north and north east of this line, water flows to Lake Frome, and south and east of this line flow into the sea.
There are two prominent mounts in the area, including Mt Lock and Mt Ngaduri. The western edge of the Hundred is marked by the Narien Range. Mt Lock, also known as Flat Top Rock, is over 745 meters in height.
There are no services available in the town of Mannanarie itself, so residents travel south to Jamestown, east to Peterborough or north to Orroroo, but for a wider range of goods and services, 90 km south to Clare, 79 km west to Port Pirie or 134 km north-west to Port Augusta. For the next largest range of goods and services, 221 km south to Adelaide.

Goyders Line
Goyders Line is a theoretical line which divides the areas of land which said to be able to be cropped and those where crops can not grow. The broadly accepted message of this theory is that "inside" the line (to the south) cereal crops could be grown but the areas beyond that could only support pastoralism.
Its creatio was in 1865 when drought crippled the north. Surveyor-General George W Goyder was sent north to identify affected regions. He plotted the south-most limit of drought stricken country on a a continuous map line across the colony. This is now known as Goyder's Line. This however has not prevented cereal crops establishing beyond the line.