nd the coordinates of 
pographic data base. 
+ 3.6 m. We should 
fy well-defined points 
village (80% of the 
ic. were chosen. 
that 90% of the well. 
- 4m. Even if the 
ined by a comparison 
results indicate that 
ital topographic data 
template revising the 
CO. 
DATING 
  
Cost including a 
Soft Orthophoto 
Series 
Available from 
Dept of Natural 
Resources and 
Energy 
1:10 000 
Enhanced Digital 
Database 
$ 450 
$ 400 
$ 250 
$ 300 
Not Required 
$ 150 
  
Extra 
$ 150 
$ 150 
| 
  
$ 1 850 
» evaluate the soft 
update the digital 
ling of the process 
ined. 
ard soft orthophoto 
ie. production of à 
a refinement of the 
  
The New Brunswick Department of Natural Resources and 
Energy has embarked on a ten year colour aerial photography 
project at the scale of 1:25 000. (Figure 7-1). By the end of 
1994, the whole southern part of the province will be available. 
This will give the province a wide range of sites to refine the 
cost of the digital topographic data revisions using soft 
orthophoto. 
COLOR AERIAL PHOTOGRAPHY 
TEN YEAR PLAN 
  
  
  
  
  
  
Figure 7-1 
Potential cost optimization could be achieved in the following 
areas: 
- optimization of the flight line 
- changing the GPS position of the photogrammetric camera 
from + 5 m (1993 photography contract) to + 20 cm 
- Scanning costs for use of the Zeiss PhotoScan PS 1 
belonging to the Triathalon Mapping Services company in 
British Columbia were $190 (1993) per colour photo 
(24 bits) at a resolution of 15 um. Larger contracts might 
reduce the cost. 
- Production of the soft orthophoto required three (3) hours 
of processing (each photo) on a SUN SPARC station IPX 
equipped with 16 MB of central memory. The processing 
tme is reduced to 20 minutes on a HP 9715/50 
workstation. Processing time could be reduced to 
10 minutes in a production environment. 
8. CONCLUSION 
The project to evaluate the soft colour orthophoto for the digital 
topographic data revision has given positive results. 
We anticipate the demand for a soft colour orthophoto base will 
grow in the years to come as an ideal backdrop for parcel 
mapping, and a host of other applications. The soft colour 
orthophoto base can become a profitable product on the 
Blectronic Information Highway. 
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