CIP A 2003 XIX 11 ' International Symposium, 30 September - 04 October, 2003, Antalya, Turkey 
This test shows the enormous potential of the modem sensors 
that obtain the highest quality digital cartographic products 
through automated documents or documents that can be 
automated. 
Raster cartography of the square 
The comparison was inevitable between the true orthophoto of 
the square with the other raster cartographs that the authors 
generated and studied. Raster cartographs, photoplans, 
orthophotos and true orthophotos still stimulate fascination in 
the final user, whether he or she is a professional or citizen. The 
appeal of getting a bird's eye view was clear in the volume 
dedicated to the photoplan of Venice of 1911 (Scarso, Guerra 
2000) where the first carto-photographic representation of the 
Square was published. The easy reading of an aerial photo or 
one of its elaborations is due to the great similarity between 
natural vision and photography; what is lacking any 
fig5 True orthophoto of san Marco square 
interpretation, or any aid to the understanding of the territory 
represented. In the evolution from aerial photograph to the 
photoplan, to the orthophoto to the true orthophoto, the metric 
content has increased dramatically, while keeping the same 
colouration. 
The evolution of these representations is visible in the images 
reported that show the photoplans of 1911 and 1982, the 
orthophoto of 2000 (CGR) and the true orthophoto of 2003. 
In 1999, the authors converted the photoplan of 1982 to digital 
format and published it on a CD-Rom using the most important 
Venetian dailies for distribution. Sales in a single day topped 
10,000 copies, demonstrating the enormous public success of 
cartographic photography. It would be appropriate to relaunch a 
similar operation using the true orthophoto in order to provide a 
metrically accurate product.