120 
Cost of Digitizing from 1:63,360 Scale Photography 
Effective area of stereo model 
22.68 
sq. miles 
Model Aerial Triangulation 
15 
minutes 
Model Re-Set to Digitize 
3 
minutes 
Hydography Digitizing 
189 
minutes 
Culture Digitizing 
208 
minutes 
Contour Generation 
440 
minutes 
Resource Polygon Digitizing 
259 
minutes 
Edit Data 
56 
minutes 
Total 
1,170 minutes 
Total Cost/Model 
$720.33 
Total Cost/Acre 
$ .05 
Total Cost/Sq. Mi. 
$ 31.76 
Cost of Digitizing, Digital Terrain Models Data Only 
Aerial Triangulation/model 
Model Reset/model 
Digitize in Profile Mode - 4mm scan spacing 
15 minutes 
3 minutes 
185 minutes 
Total Time 
203 minutes 
Total Cost 
Cost/Acre 
Cost/Sq. Mi. 
$124.98 
$ .009 
$ 5.50 
This scanning provides data for digital terrain model 
(Digital Elevation Models) and data can also be used to drive 
"off line" orthophoto projectors. 
Cost of gathering meaningful data on the analytical stereoplotter is, 
as a minimum, about the same cost as digitizing from existing maps. 
The advantages are: 
o All data is on common geographic base; 
o All data at a common time period; 
o Accuracy of the data is adequate to use for development and 
implementation of "action plans"; 
o One can easily return to the photograph to gather more data; 
o Can generate data in areas not already having maps, etc.; 
o Can get data in a GIS at any level of accuracy required.