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of all the Canada Land Inventory data at the 1:250 000 scale is in the data base. Data from the 
scales between 1:10 000 and 1:250 000 have been routinely stored in the system. Another automatic 
cartographic line digitization using the Calspan line following system way developed by Dr. A.R. Boyle, 
of the University of Saskatchewan. 
The National Capital Commission's policy is to maintain a blanket coverage of the rural portions of 
the 1800-square-mile region on five-year update cycle and the Ottawa-Hull portions on a two year 
basis. The development of the NCC urban information system was the prime reason for a move into 
automated mapping. The information system is designed to be an aid to urban problem solving, not 
only for the Commission but by others in this region, 
The National Research Council of Canada (NRC) analytical plotter system and the NRC orthocartograph 
with the stereo-compiler have been designed and are being further developed in the Photogrammetric 
Research Laboratories of the National Research Council of Canada. The NRC analytical plotter is an 
on-line, man-machine information processing system. 
The NRC orthocartograph with the stereocompiler constitutes a predominantly analog man-machine system. 
The orthocartograph was designed primarily for simultaneous production of orthophotos and stereo- 
orthophotomates. The main components of the system are an analog plotter, two printing drums, two 
optical trains for image transfer with corresponding printer heads, a small fixed-program digital 
computer and a set of digital servo-control. Two on-line sub-systems are also being developed for the 
orthocartograph: the automatic drop-dot containing device and the automatic relief shading feature. 
The NRC stereo-compiler is a logical off-line component of the orthocartograph or, for that matter, 
of any system capable of producting stereo-orthophotos. 
The Surveys and Mapping Branch completed 1:250 000 series in 1968. There are 918 maps in this series 
which is in great demand by many government and private organizations and serves as the present scale 
for the 1:500 000 and 1:1 000 000 series which fulfills an important function as topographic base for 
aeronautical charts and geological maps. Of approximately 13 200 sheets in the 1:50 000 series 
approximately 7 000 have been completed and must now be kept up to date. 
The Canadian provinces are presently embarking on their own mapping programs, generally speaking at 
larger scales, but always tied to the national geodetic datum. Since the provinces map the same 
terrain as the federal government but at larger scales it is evident that a significant degree of 
cooperation with regard to mapping and cartographic standards is highly desirable, if only for rea- 
sons of economy. Thus the larger scale provincial maps may be used to revise the smaller scale 
federal maps. Thus, it is desirable that automated cartography systems at different levels of 
organizations be compatible. 
Photomaps and orthophotomaps have been accepted for several years for rural mapping. The entire pro- 
vince of Prince Edward Island has been mapped at the scale of 1:5 000. Photomapping projects are 
presently underway in Ontario, Manitoba, Saskatchewan, Alberta, British Columbia and the Northwest 
Territories for legal surveys. 
Beginning in August 1974, it was decided that all subsequent compilations in the 1:50 000 series were 
to be metric. So far almost 500 map sheets in the 1:50 000 series have been printed. All of these 
are north of the "wilderness line" and are monochromatic. The manual contour intervals are 10, 20 
and 40-metres. Approximately 13 200 map sheets are required to cover Canada at the 1:50 000 scale. 
Of this number almost 6500 map sheets have been published in the English system. 
The National Air Photo Reproduction Centre has prepared a series of photomaps from Landsat (satellite) 
imagery which cover Canada south of 80 degrees latitude. Considering Canada's land mass of 3.85 
million square miles, this is the largest undertaking of its kind in the world. The country was 
divided into 12 segments conforming to major geographic or political boundaries. Out of a total of 
40 000 images, 1004, Band 6, and in some portions Band 5, Multispectral Scanner images were assembled 
into mosaics using the 1:1 000 000 aeronautical chart base which is on the Lambert Conformal Conic 
projection. The mosaics have an accuracy relative to these bases of approximately 1 to 1.5 kilometres. 
Continuous tone prints of each segment have a border; but, no photo image enhancement is available at 
a scale of 1:2.5 million. 
In addition to the 12 area sheets composed of summer imagery, there is a 1:2.5 million Manitoba sheet 
prepared from winter imagery, a 1:1 million sheet of both Newfoundland and the Maritimes from summer 
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