PIXEL RANGE: 50 50 4430 4424               :
GRID RANGE:   2100'00"  7040'00"    2200'00"  7100'00"  :

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For each line, value 0 denotes the type, see below.

Values 1,2 denote the pixel coordinates of the start of the contour.

The types are as follows:-

16 for a fixed height contour. Its elevation is shown by value 3. The rest of the line consists of course values from 0 to 7, denoting movement to a neighbouring pixel in a direction E,NE,N,NW,W,SW,S,SE respectively.

17 for a spot height, elevation shown by value 3. No course values follow.

18 for variable height and water body contours. The start and end elevations are shown by values 3 and 4. A second type value follows, see below. Course values follow as in type 16. For coastline, lakes and islands, the start and end elevations will be the same, but for ridges, river banks and streams, they may not.

19 for a small lake or island of indefinite height. Value 3 is set to 42 for a lake or 43 for an island, as for second type below. Type 19's are always closed rings and their direction is always anti-clockwise.

Second Type Values (Types 18 and 19): 40 = Ridge; 41 = Valley; 42 = Water body on left; 43 = Water body on right
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18 4355 4333 0 0 43 6 7 0 7 7 7 1 1 1 2 3 2 2 3 4 3 4 4 4 5 5 6 7 
18 4354 4365 0 0 43 5 5 6 5 5 5 6 5 5 6 5 6 6 7 7 0 0 0 0 7 0 0 0 0 0 0 7 0 7 0 0 7 0 7 1 1 2 2 1 2 2 2 2 2 2 3 2 2 2 2 2 3 2 2 2 3 2 2 3 3 4 3 5 5 4 5 5 5 4 5 5 
18 4357 4387 23 96 40 5 5 6 5 5 5 5 5 6 5 
18 4348 4399 103 196 40 6 5 6 5 6 6 5 6 5 6 6 5 6 5 
16 4318 4411 80 5 4 5 5 5 4 4 5 5 4 5 5 5 5 6 6 6 
16 4306 4413 60 4 4 5 5 4 5 4 5 6 5 6 5 5 5 5 
16 4290 4416 20 0 1 1 1 1 0 1 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 1 0 1 0 1 1 1 0 1 1 0 1 1 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 0 1 0 1 0 0 1 0 1 0 1 0 0 1 0 0 0 7 7 7 7 6 6 6 5 6 6 6 6 6 6 6 7 6 7 7 6 7 7 7 6 6 6 7 6 6 7 6 7 6 7 6 6 7 6 
18 4374 4423 0 0 42 7 3 
18 4374 4423 0 0 43 2 2 2 2 2 2 3 3 3 3 2 2 3 2 2 3 2 3 2 3 2 2 1 2 2 3 2 2 2 2 2 2 2 3 3 2 3 4 3 4 4 4 4 4 4 4 4 4 4 4 4 5 4 4 4 5 4 5 4 5 4 5 4 5 4 4 5 4 4 5 4 4 5 4 4 4 5 4 5 4 5 4 5 4 5 4 5 4 5 4 4 5 4 5 4 5 4 5 4 5 4 5 4 5 4 5 4 5 4 5 5 4 5 4 5 4 5 4 5 4 4 5 4 5 5 5 6 7 6 6 
16 4320 4424 100 2 1 2 1 2 1 1 2 1 2 1 2 1 2 1 2 1 2 1 0 1 1 1 0 1 1 1 0 1 0 0 0 1 0 0 7 0 7 0 7 0 7 6 7 6 7 6 6 7 6 6 7 6 7 6 6 6 6 6 6 6 5 6 6 6 
16 4334 4424 200 1 2 2 1 2 2 1 2 1 0 1 1 7 7 0 7 6 6 6 6 6 6 6 6 
17 4339 4424 220 
16 4287 4420 20 5 6 7 0 1 2 3 4 
19 2224 557 43 5 5 5 6 6 7 7 7 6 7 0 1 2 2 2 2 2 2 2 2 3 4 4 
19 755 580 43 5 6 6 6 6 6 6 6 6 7 0 1 2 2 2 2 1 1 2 2 3 4 4 4 
19 2197 587 43 5 6 6 6 6 6 6 6 7 0 1 2 2 1 1 2 2 3 3 4 4 
19 2934 610 43 5 6 6 6 6 6 6 6 6 6 6 7 0 1 2 2 2 2 2 2 2 2 2 2 3 4 
19 728 2223 43 5 6 6 6 6 6 6 6 7 0 1 2 2 2 1 1 2 2 3 4 4 4 

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