OIL FIELD 1
30+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
  |....................................................................@|
  |....................................................................*|
  |....................................................................*|
  |....................................................................*|
25+....................................................................*+
  |....................................................................*|
  |....................................................................*|
  |....................................................................*|
  |....................................................................*|
20+....................................................................@+
  |....................................................................*|
  |....................................................................*|
  |....................................................................*|
  |....................................................................*|
15+....................................................................*+
  |....................................................................*|
  |....................................................................*|
  |....................................................................*|
  |@********************************************************************|
10+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
  0    5    10   15   20   25   30   35   40   45   50   55   60   65   70
OIL FIELD 2
40+----+----+
  |.........|
  |.........|
  |.........|
  |.........|
35+****@****+
  |.........|
  |.........|
  |.........|
  |.........|
30+----+----+
  30   35   40
OIL FIELD 3
Map is too big to draw for pipeline at 1
OIL FIELD 4
10+----+----+
  |.........|
  |.........|
  |..@......|
  |..*......|
 5+..*......+
  |..*@.....|
  |..**.....|
  |*@*******|
  |.....@...|
 0+----+----+
  0    5    10