Illinois Natural Resources Geospatial Data Clearinghouse Geospatial Data Clearinghouse Home


Historical Aerial Photography for Calhoun County, Illinois - MrSID Format

ILHAP County Code: SG
Flightline Orientation: West to East
Number of Flightlines: 19
Year of Photography: 1940
Target Compression: 6:1
Average file size:


Photo Index:
Calhoun NW (2.8 Mb),
Calhoun NE (1.2 Mb),
Calhoun S (2.4 Mb)

Index Data: calhoun.zip
  • Highlighted table cells indicate files that best delineate the county boundary.
  • The shape of the county is distorted in the flight line direction.
  • Links are displayed by exposure number.
  • File names include codes for county, roll number, and exposure number.

Flightline West to East
N
to
S
1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32  
2   28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1  
3   92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 37 36 35 34 33 32 31 30 29  
4   58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77  
5   28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43  
6   27 26 25 24 23 22 21 20 19 18 17 16 15 14 13  
7   1 2 3 4 5 6 7 8 9 10 11 12 12.5  
8   59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44  
9   60 61 62 63 64 65 66 67 68 69 70 71 72 73 74  
10   88 87 86 85 84 83 82 81 80 79 78 77 76 75  
11   27 26 25 24 23 22 21 20 19 18 17 16  
12   1 2 3 4 5 6 7 8 9 10 11 12 13  
13   28 29 30 31 32 33 34 35 36 37 38 39 40 41  
14   15 14 13 12 11 10 9 8 7 6 5 4 3 2 1  
15   74 73 72 71 70 69 68 67 66 65 64 63 16 15 14  
16   62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43
17   42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25  
18   24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9  
19   30 31 32 33 34 35 36 37 38 39 40 41 42