In the multitude of appearing problems are also intervening 
problems. The selection of a certain type from a category will influence 
the selection field at disposal in other categories. For example, the 
selection of a certain type of airplane will restrict the number of types 
of sensors to those appropriate to this and vice versa. 
SOME APPLICATIONS IN WETLANDS - DANUBE DELTA 
For the delta case - specifically of the Danube Delta and the 
coastal area of the Black Sea - in the above mentioned sense, we have 
done some preliminary studies and tests are now in development. 
It should be mentioned from the very beginning that the 
wetland-delta areas are extremely complex as they contain ultimate situations 
of saturation and very diverse mixed areas. 
To contour the frame-model in synoptic tables it has been put 
in two columns: existing means (captors-sensors, platforms, preprocessing 
and processing systems, etc.) and respectively potential ones with their 
characteristics, comprising the unit conventional costs too, in comparable 
units. The existing information was systematized and stock-taken, 
according to the data handling plan (Appendix 1). It has been thus comprised 
in the whole the process in its phase of conception-design and development. 
These parameters-values are input data in the model. At the requirements 
level as output data were put the required products: thematic maps, Data 
Bank, statistical recognitions, pattern recognitions, objects and phenomena 
identification, the final aim of the photointerpretation - remote sensing. 
In the sense of the above mentioned: 
- It has been attentively stock-taken the denomination-nomen 
clature in the area, not only as proper names but also as specific dif 
ference to delimit the notion which is closely correlated to some charac 
teristics as: origin, formation process, depth, salinity, warping tenden 
cies , etc.: 
- Seasonal, annual, 10 year and 30 year calendars have been drawn 
to observe the delta dynamics; 
- Synoptical maps have been drawn for the meteorological phenomena 
in the area, on short and long terms, putting forth the characteristic 
moments and periods; 
- Evidences were made for the existing aerial photographs, with 
all their characteristics; the same for the ERTS and NUMBUS space record 
ings establishing the correlation with the data from the airborne and ter 
restrial recordings;