Autógrafo Gran Angular Wild A9 
Wild A9 wide Angle Autograph with EK5 electric coordinate 
Printer (Instituto Geográfico y Catastral) 
Los aparatos que en la actualidad existen en España y la 
comparación con lo que había en 1964 se refleja en el si 
guiente cuadro: 
APARATOS 
Uni 
versales 
Normales 
TOTAL 
1964 
10 
38 
48 
1968 
Organismos oficiales... . 
12 
47 
59 
Organismos privados... . 
7 
28 
35 
19 
75 
94 
Incremento 
9 
37 
46 
Vista general de uno de los gabinetes de restitución del I. G. C. 
General wiew of a plotting room of the I. G. C. 
The plotting machines existing at present in Spain and the 
comparison with those existing in 1964 is shown in the 
following table: 
PLOTTING MACHINES 
Universal 
Normal 
TOTAL 
1964 
10 
38 
48 
1968 
Official Agencies 
12 
47 
59 
Prívate Companies 
7 
28 
35 
19 
75 
94 
Increase 
9 
37 
46 
PhotointerpretaHon 
The application of photointerpretation in Spain began by 
geologic studies, of mining and oil prospection and forest 
exploitations, but its use increased so quickly that it was 
considered feasible to organize a symposium to establish contact 
between agencies and investigators who make use thereof; 
it was held in Madrid from May 5-7, 1966; with a total 
of 34 papers grouped into five sections: seven of Archeology 
and Art; six of Botany and Edaphology; four of Geography; 
17 of Geology and two of Photography. Since this date the 
activity in this field has increased. 
From the works being realized by this method the following 
may be quoted: 
Modernization of topographic maps at the Instituto Geográ 
fico y Catastral and the Servicio Geográfico del Ejército. 
Preparation of geological maps at the Instituto Geológico y 
Minero. Preparation of soils maps in the Mapa Agronómico 
Nacional and at the Instituto de Edafología. Prospection and 
soils research at the Junta de Energía Nuclear. Instituto Geo 
lógico y Minero and Servicio Geológico de Obras Públicas. 
Vegetation studies at the Instituto de Investigaciones Agro 
nómicas and at the Instituto Forestal de Investigaciones y Es- 
periencias. 
Soil utilization maps at the Universities of Zaragoza and 
Pamplona. 
And research studies made in the fields of Archaeology, 
Botany and Geography. 
Special applications 
Photogrammetric compilation has been realized on artistic 
monuments and there is a project to make up a catalogue 
of national artistic monuments using Photograxnmetry for this 
purpose. 
Methods 
It therefore follows that the cameras which both the private 
companies or agencies devote to this activity are those which 
can be purchased on the market i. e. size 24 X 24 cm. and 
focáis of 150 and 8,8 cm. 
We have recently initiated the use of “KODAK AERO- 
NEG Color System” with the possibility of obtaining directly 
glass plates, paper prints, or positive transparencies, both in 
black and white or color. By using Aero-Neg we can obtain 
a considerable increase in potential utilization of flights. 
Control points and their determination are a function of the 
results to be obtained and of the accuracy required. Beginning 
with the works on a large scale where in order to secure a 
precision the control points are determined model by model 
and to excess, both in what is related to planimetry and to 
altitude, we are gradually using, by lowering the scale, aero- 
triangulation in blocks, by means of separate passes of a small