PIXEL RANGE: 50 50 4430 4030               :
GRID RANGE:                                              :

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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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17 2455 3971 51 
18 1172 3962 15 19 40 5 4 4 5 4 4 5 4 5 4 4 5 4 4 5 4 5 4 4 5 4 4 5 4 5 4 4 4 4 3 4 4 4 4 4 3 4 4 4 4 4 3 4 4 4 4 4 3 4 4 4 4 4 3 4 4 4 4 4 3 4 4 4 4 4 
18 1172 3962 15 19 40 0 7 7 6 7 6 7 6 6 7 6 7 6 7 6 6 7 6 7 6 7 6 6 7 6 7 6 7 6 6 7 6 7 6 7 6 6 7 6 7 6 7 6 6 7 6 7 6 7 
16 1106 3964 20 6 6 5 6 5 6 5 5 6 5 6 5 5 6 5 6 5 6 6 7 6 6 7 7 0 7 7 7 0 7 7 7 7 0 7 7 7 0 7 7 7 7 0 7 7 7 0 7 7 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 7 7 6 7 7 7 6 7 7 7 7 6 7 7 7 6 7 7 7 7 7 7 6 
18 1093 3965 40 59 40 3 4 4 4 4 4 4 4 4 4 4 3 4 4 4 4 4 5 4 5 5 4 5 4 5 5 4 5 5 4 5 5 4 5 4 5 5 4 5 4 4 4 4 4 4 5 4 4 4 4 4 4 4 4 4 4 4 5 4 4 4 4 4 4 5 4 5 4 5 4 5 4 5 4 5 4 5 4 5 4 5 4 5 4 5 4 5 4 
16 1094 3965 40 6 5 6 5 5 5 6 5 5 4 5 5 4 5 4 4 4 5 4 4 4 4 4 4 4 5 4 4 4 4 4 5 4 4 4 5 4 4 4 5 5 6 6 6 6 6 7 7 0 0 0 7 0 0 0 7 0 0 0 7 0 0 7 0 0 0 7 0 0 0 7 0 0 0 7 0 0 0 7 0 7 7 7 7 7 7 7 7 7 7 7 7 6 7 7 6 7 7 6 7 7 7 6 7 7 6 7 6 7 6 6 6 
18 1095 3965 40 21 40 0 0 0 0 0 0 0 0 0 7 
18 2367 3971 43 41 40 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 5 4 4 4 4 4 4 4 4 4 4 4 4 4 5 4 4 4 4 4 4 4 4 4 4 4 4 4 5 4 4 4 4 4 4 4 4 4 4 4 4 4 5 4 4 4 4 4 
18 2367 3971 43 40 40 0 1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 1 0 0 1 0 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 0 1 0 0 1 0 0 7 0 7 6 7 6 7 6 7 5 5 6 5 5 5 5 6 5 5 5 5 6 5 5 5 5 6 5 5 5 5 5 6 5 5 5 5 6 5 5 5 5 6 5 5 5 5 6 5 5 
16 2299 3975 40 4 5 4 4 5 4 5 4 4 4 4 4 4 4 5 4 4 4 4 4 4 4 4 4 4 4 4 5 4 4 4 4 4 
18 2265 3980 40 55 40 4 5 4 4 5 4 4 4 5 4 4 5 4 4 5 4 4 4 5 4 4 5 4 4 5 4 4 4 5 4 4 5 4 4 5 4 4 4 5 4 4 5 4 4 4 4 4 4 4 4 4 5 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 5 4 4 4 4 4 4 4 4 4 5 4 4 5 4 4 5 4 4 4 5 4 4 5 4 4 5 4 4 5 4 4 5 4 4 5 4 4 4 5 4 4 5 4 4 5 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 5 4 5 4 5 4 5 4 5 4 5 5 4 5 
16 1003 3991 60 7 7 0 0 0 7 0 0 0 0 0 0 7 0 0 0 0 0 7 0 0 0 0 0 0 7 0 0 0 0 0 0 7 0 0 0 0 0 7 0 0 0 0 0 0 7 0 0 0 0 7 0 7 0 7 0 7 0 7 0 7 0 7 0 7 0 7 0 7 0 7 0 7 0 7 0 7 0 7 7 6 7 7 7 7 7 6 7 7 7 6 7 7 7 
16 2469 3991 40 5 5 4 5 5 4 5 4 5 5 4 5 5 4 5 5 4 5 5 4 5 4 5 5 4 5 5 4 5 6 6 5 6 6 6 5 6 6 6 6 5 6 6 6 5 6 6 6 6 
18 1003 3992 60 60 40 5 6 5 5 5 5 5 5 6 5 5 5 5 5 4 5 4 4 5 4 5 4 4 5 
18 2470 3992 40 39 40 6 5 6 5 6 5 6 5 5 6 5 6 5 6 5 5 6 5 6 5 6 5 5 6 5 6 5 6 5 5 6 5 6 5 6 5 5 5 
18 979 4010 60 50 40 5 4 5 4 5 6 5 5 5 6 5 5 6 5 5 5 6 5 5 6 5 5 
16 980 4010 60 6 6 5 6 6 6 6 5 6 6 6 6 5 6 6 6 6 6 5 6 
16 1195 4011 20 4 4 4 3 4 4 4 3 4 4 5 6 5 6 6 6 6 6 6 6 7 6 6 6 6 6 6 6 6 6 6 
18 1195 4012 20 24 40 7 6 7 6 7 6 6 7 6 7 6 7 6 6 7 6 7 6 
18 948 4030 0 0 42 1 1 1 1 1 1 0 1 1 1 1 1 0 1 1 1 1 1 0 1 1 1 1 1 0 1 1 1 1 1 0 1 1 1 1 1 0 1 1 1 1 0 1 1 1 0 1 1 1 0 1 1 1 0 1 1 1 0 1 1 1 0 1 1 1 0 1 2 2 2 2 2 2 1 0 0 1 0 0 7 6 7 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 0 7 0 0 0 0 7 0 0 0 0 0 7 0 0 0 0 7 0 0 1 0 1 1 0 1 7 6 7 7 0 1 0 0 0 1 0 0 1 0 0 7 0 7 0 7 0 7 0 7 0 7 0 7 0 0 0 0 7 0 0 0 0 0 0 0 0 0 7 0 0 0 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 0 7 6 7 6 7 6 7 7 6 6 6 7 6 6 7 6 7 6 7 6 7 6 7 6 7 6 7 6 6 7 6 7 6 7 6 7 6 7 6 7 6 7 6 6 7 6 7 6 7 6 7 6 7 6 7 6 6 7 6 7 6 7 6 7 6 7 6 7 6 7 6 7 6 7 6 7 
18 2090 4030 0 0 43 4 0 
18 2090 4030 0 0 42 1 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 0 1 0 0 1 0 0 1 0 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 0 1 0 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 7 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 1 0 0 0 1 0 0 1 0 0 0 1 0 0 0 1 0 0 1 0 0 0 1 0 0 1 0 0 0 1 0 0 0 1 0 0 1 0 0 0 1 0 0 1 0 0 0 1 0 0 0 1 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 7 7 7 7 7 6 6 6 7 6 6 6 5 6 5 5 6 5 5 5 6 5 5 6 5 5 6 5 5 5 6 5 5 6 5 5 6 5 5 6 5 5 6 5 6 5 5 6 5 5 6 5 5 6 5 5 6 5 5 6 5 6 5 5 6 5 5 6 5 5 6 5 5 6 5 5 6 5 5 6 5 6 5 5 6 5 5 6 5 6 5 6 5 6 5 


