ceeee eem 
  
1.7.4. 4. Influence of scale, in the case of small-scale maps, on new photogrammetric methods. 
(B.1. Baussart) 
1.7.5. 5. The marking of controls and boundary points in the field as a tool of high precision photo- 
grammetry. (B.1. Pastorelli) 
1.8. The presented papers (B.2) can be dealt with in the following panels, time permitting: 
2.1. 
Sub-Commission 1V/1 
Fórstner: Activity of Commission C/OEEPE and results. 
Fórstner: Errors in elevation in the bridging of stereoscopic models. 
Friedmann: Commercial practices in large scale topographic mapping in USA. 
  
Fagerholm and Thunberg: Precision aerial photogrammetry from very low altitude. 
Hothmer: Photogrammetric plotting seen from a metrological point of view. 
Rehnlund : Photogrammetry and geodetic surveying in the planing of hydroelectric power stations. | 
Sub-Commission IV/2 
Finsterwalder: Mapping of the central part of Nuremberg as an example of urban photogram- 
metric work at 1:500. 
Sub-Commission 1V/3 
Finsterwalder: Accuracy of photogrammetrie contours. 
Kasper: Comments on small scale cartography. 
Kosofsky and Spooner: An integrated mapping system. 
Swanson: Photogrammetric survey for nautical charting use of color and infrared photography. 
Panel 2 
Benson: Automatic photogrammetry information. 
Cude: Automatic and semi-automatic mapping. 
Doyle: The integration of photogrammetry and electronic data processing equipment for highway 
design. 
Prior: The role of aerial surveys in highway engineering. 
Ternryd: Photogrammetry and electronic computation in highway planing. 
Zarzycki: Numerical photogrammetry in railway design and construction. 
Panel 4 
  
Institut Géographique National de France. 
The 1:200 000 photogrammetric survey of Saharian regions, using airborne means of determi- 
nation of control. | 
General status of the art and trends of future development | 
The evolution in the methods of producing maps of the surface of the earth is still going on. It is 
even hastening with the introduction of new or modified methods taking into account the gigantic 
future needs for coordinates, maps and plans of all kinds. The labors of Commission IV at the 
London Congress can only be useful if the few most important developments are detected by 
analysis of the extensive documentation available (preliminary inquiries, publications, etc.). The 
discussion should show which developments promise qualitative and quantitative improvements 
in the production of coordinates, maps and plans. 
A certain group of new developments covers the materials, instruments and technical or scientific 
bases of photogrammetry. Airplanes and navigational means improve constantly. The emulsions 
and their bases (film or plates) seem about to double their quality every 10 years, the optical and 
mechanical gain in precision of cameras and plotting machines follows at about the same rate. 
  
2.3. 
3.1. 
3.2.