applications are already divided 
into Information-retrieval, 
Data-management and Maintenance 
(refer to Fig. 3.1). 
Besides the obligatory HELP-, 
RETURN- and EXIT-functions the 
Information-menu offers two ways 
of selecting an entry (one by 
selecting from the catalog, the 
other by a graphical display of 
all objects in a specified test- 
area) and a facility to display 
all information stored to an 
object (Fig. 3.2). Both 
selection-tools may also be used 
to get an overview what entries 
are stored in the MDB. The 
graphical one demonstrates the 
modular philosophy in IMC : a) 
it is defined as a function to 
be called by any other Wave- 
routine and therefore open for 
accses from both inside and 
outside the MDB and b) it again 
features the tools just 
mentioned : select by catalog 
and display information. The 
latter (Fig. 3.2) offers the 
possibility to either store the 
display as an image (in 
SunRaster format) or send it to 
a postscript-printer. 
For Datamanagement all necessary 
modules have been implemented, 
a) enter new entry, b) edit 
entry and c) delete an entry. 
Before storing edited 
information or removing an entry 
a backup of the old information 
is created. 
Maintenance of the database 
consists so far of simple 
consistency checks : Each entry 
in the catalog is checked for 
existence of its meta-data and 
vice versa. If an inconsistency 
is detected recovering via the 
backup-information can be tried. 
4. CONCLUSIONS 
The designed database serves its 
purpose as a project-oriented 
information-system. It is open 
443 
to be called from application- 
routines outside the MDB as well 
as to serve as interface to the 
applications. 
Next steps will include the 
definition of more clusters. 
Right now work is being done to 
install modules for the 
definition of training-areas for 
the classification. The defined 
areas will not be stored in 
respect to an image but to the 
ground-coordinate-system.