RESEARCH ON SYMBOLIZATION OF TOPOGRAPHIC MAP
J. Xiao, H. Liu
mapmaker01@163.com
Digitalization
of paper map is one of methods for getting digital map (or geographic
information or spatial data), but there are a lot of differences about map
information between paper map and digital map. Firstly, this presentation
introduces the reasons for bringing such differences in the process of
digitalization. Geographic information (or digital map) produced by
digitalization is a very important kind of data source for GIS, and in GIS
application digital map organized in disk or memory must be symbolized into
electronic analogue map on computer screen. In order to reach excellent
visualization effect, the map information difference between analogue map and
digital map should be retrieved in the process of symbolization.
Secondly,
this paper discusses the requirements of symbol design principles in
traditional paper mapmaking and new changes and advantages in electronic
devices environment. In this context, map symbolization is developing from
static state to dynamic interaction.
Thirdly,
this dissertation introduces a method using cartographic expert knowledge and
experience to control the process of dynamic map symbolization. In the third
part, the author thinks it should formalize the fuzzy and ambiguous expert
knowledge and build expert knowledge repository.
In the
fourth part of this paper, by an example it illustrates how to establish
cartographic expert knowledge repository and how the formalized expert
knowledge to control the geographic features’ symbolization.
In the
fifth part, it elaborates how the formalized cartographic expert knowledge to
control the annotations’ symbolization on map.