F.J. Ormeling - GENERALISATION OF SMALL-SCALE
TOPOGRAPHIC MAPS
Wit the Karta Mira 1:2, 5 million as an example, the author
discusses the special needs of small-scale topographic or
chorographic maps. As absolute locational accuracy is not
longer required nor possible at these scales, geographic
characterisation becomes pre-eminent. After discerning
landscape types, relief-, coast- and drainage types, the
manner of representing these types can be recommended.
The effects of raster mapping are commented upon, and the
contributions of mathematical approaches to generalisation,
as by Töpfer, are discussed.
G. G. L. SteurF. de Vries and A. M. van Slobbe - A NEW
GENERAL SOIL MAP OF THE NETHERLANDS 1:250,000
A new general soil map of the Netherlands was recently
published at a scale of 1:250,000. It is mainly derived from
the soil map 1:50,000. The legend contains about 120 units.
According to parent material they are divided into: peat(y)
soils, sandy soils, marine loams, recent fluviatile loams
and clays, pleistocene (and older) loams and elays, and
aeolian silt (loess). Further subdivisions are according to
the associations of subgroups in the Netherlands' System of
soil Classification.
The Topographic map 1:250,000 of the Topographic Service
(in the UTM-projection) forms the base of the coloured soil
map in 4 sheets. The base map has been revised only at
places where revision was highly necessary.
For the cartographic preparation use was made of scribing
techniques on separate films as much as possible.
The soil map has been digitised and the data were stored to
enable automatic production of new interpretations. One of
the advantages has been the rapid automatically plotting of
colour models to be used in peeling open window masks.
In a separate booklet map units are described and their quali-
ties analysed. Land evaluation is given for intensive, highly
mechanised agriculture (arable land and grassland).
J. N. H. M. van Snellenberg - CLASSIFICATION FOR
CARTOGRAPHIC INFORMATION
Existing Classification Systems for catalogueing and retrieval
are usually adapted to written Information. Since graphic In
formation differs essentially from written Information, car
tographic information needs its own Classification. Such a
Classification must be based upon the special characteristics
of cartographic information. These aspects are analysed and
placed in their logical relationship. Special emphasis is
placed upon the Classification of area and subject. A com-
prehensive and consistent Classification of area is highly
important for cartographic information. In order to achieve
this, three main problems have to be solved, namely the
Problems of subdivision, time and language. Subject Classi
fication for cartographic information needs its own structure
which is different from classifications used for bookmateri-
als. The main reason for this is the fact that maps deal with
a concrete representation of phenomena, rather than with
their rational and discurslve analysis. In order to frame a
functional subject Classification, two aspects of cartographic
information are to be considered: the way a map is made up
generally, and the geographic approach to the world' s pheno
mena.
E. H. van de Waal - 10 YEARS WORKING GROUP ON MAP
CURATORSHIP: BACKGROUNDS AND NEW DEVELOP
MENTS
The Working Group on Map Curatorship of the Netherlands'
Cartographic Society was established in 1975. This paper
describes the start of the Working Group, its objectives and
its activities. Special attention is paid to international Co
operation, particularly in the Section of Geography Map
Libraries of the IFLA (International Federation of Library
Associations Institutions) and to the role of the Working
Group in training map curators. New developments in the
supply of cartographic information are listed. They will in-
fluence the future tasks of map curators as well as carto-
graphers considerably. Close co-operation will be needed
to overcome the problems that will arise.
KT 1985. XI. 4
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