Figure 2: Athabasca River old and revised vector features (original in colour). 
The existing contours for the Jasper map were 
compared visually by superimposition to the ones 
automatically generated by the DPW770. This 
comparison showed that the new digitally 
generated ones were acceptable in form and 
accuracy. The editing required for the DEM 
generated contours consists of adjustments for the 
re-entrance on streams, deletion of very small 
isolation contours and smoothing for cartographic 
presentation. 
4.3 Quality control and time breakdown 
The quality control of the revised vector data set 
consisted of four steps: a) verifying the feature 
codes with a statistical listing of the data set’s 
content, b) inspecting a 1:50 000 plot of the data 
for content using the previous edition NTS map 
sheet and the field information, c) performing an 
inspection on the workstation of the revised 
vector data superimposed on the digital 
orthophotomosaics to check the horizontal 
positional accuracy of the data as well as the 
content, and d) creating topologically structured 
data. 
The times shown below are estimates of the net 
production time required for the completion of the 
prototype revision of the 1:50 000 NTS Jasper 
map sheet, as the actual project time included 
such activities as training on and familiarization 
with the systems, defining the data requirements, 
and developing and implementing the procedures. 
Description Person Days 
Aerotriangulation 5 
- Cross pugging 
Production of orthophotomosaics 10 
Preparation 6 
- system preparation 
- importing and preparing vector data set 
- importing and preparation of the digital 
orthophotomosaics 
Digital map revision 30 
- revision/re-compilation 
uality control 4 
Total 55 
These figures are specific of the Jasper map sheet 
and may vary depending on the relief of the 
terrain and the amount of revision required. 
Please note that the time for field work is not 
included. 
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B4. Vienna 1996 
  
  
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