Table 5. Image to Control (values at ground scale) 
UTM Coordinates 
Space rectangular 
Coordinates 
Similarity Af fine 
Perspective Protective 
Image A 
X 
= 
60 m 
(30 pts.) 
y 
= 
71 
R 
= 
93 
Image C 
X 
= 
66 
(11 pts.) 
y 
= 
66 
R 
= 
93 
Image B 
X 
= 
64 
(15 pts.) 
y 
= 
65 
R 
= 
91 
Image D 
X 
= 
64 
(14 pts.) 
y 
= 
78 
R 
101 
x = 54 m x 
y = 66 y 
R = 85 R 
x = 62 x 
y = 63 y 
R = 88 R 
x = 55 x 
y = 63 y 
R = 88 R 
x = 55 x 
y = 65 y 
R = 85 R 
32 m 
X 
= 
31 m 
32 
y 
= 
31 
45 
R 
= 
44 
20 
X 
= 
20 
20 
y 
= 
20 
28 
R 
= 
28 
29 
X 
= 
23 
25 
y 
= 
24 
35 
R 
= 
34 
29 
X 
= 
23 
29 
y 
= 
23 
41 
R 
= 
33 
a geologic map and as a prototype 1:100,000-scale image map 
of the New Bedford quadrangle. 
Selection of RBV Imagery 
RBV images were selected covering the proposed map area by 
using a Landsat coverage index of North America showing 
precise path and row identification numbers with respect 
to the geographic location of the map area. These path 
and row numbers provide the position of specific MSS 
scenes. Four RBV subscenes cover the area of a single MSS 
scene and it is desirable to have them taken on a single 
exposure date in order to obtain best image uniformity for 
the mosaicking. The desired single exposure date was 
found to be available for four subscenes having identifi 
cation number 830167 - 14444 x A, B, C, D, from path 12 
row 31 taken on August 19, 1978. The selected subscenes 
were of a "good" quality rating of "8" as based upon the 
normal quantitative assessment procedure for Landsat 
products. Each subscene also had cloud cover of no more 
than 20 percent. These RBV subscenes were ordered from 
the Eros Data Center (EDC) as film positive transparencies 
having a nominal image size of 7.3 inches square and a 
scale of 1:500,000. This particular size provides an 
ideal format for image marking and measurement. 
Control Materials 
Aerial photographs which had been used for a standard 
aerotriangulation project in eastern Massachusetts and 
Nantucket Island and which have field identified horizontal 
control points (State plane rectangular coordinates in 
feet) were found to be available from the Eastern Mapping 
Center, U.S. Geological Survey. The report included with 
this project indicated that there were "no serious 
problems" encountered in the fully analytical adjustment 
triangulation program. A vector diagram indicated that 
adjusted residual errors for all points were under 10 feet.