Research On Representation Methods Of Geographical Features Symbol In Navigation Digital Maps

With the rapid growing of automobile industry, in-vehicle navigation systems are obtaining more and more attention both in and out of our country, showing better prospect of development and possessing very great market demand potential. Navigation electronic map plays an important part in navigation systems as a special application of electronic maps, in that it can transmit spatial information, especially road and traffic information, in both visual and audio forms to users, and therefore it is considered as the bridge across road navigation and users Up to now, the development of in-vehicle navigation systems has been in a initial stage in our country. As there is a lot of difference between representation methods of navigation electronic maps provided by different producers, it is in an urgent need to design a standard for navigation electronic maps, which not only meets needs to standardize their markets but also suits the situation of our country.This dissertation first analyzes both domestic and foreign methods to represent navigation electronic maps, and points out existing problems. We can see these problems in two main aspects, one copying foreign patterns or the representation pattern of paper maps, and the other lacking theories and methods to guide the design of navigation electronic maps. Later, with the help of cognition theory, map symbols theory and color theory, this paper makes research on the content and methods for the representation of geographical features in navigation electronic maps, proposes an effective scheme suiting to the design of navigation electronic maps, and also specifies the methodology to design navigation electronic maps.Furthermore, this paper analyzes special properties of navigation electronic maps in aspects such as map-reading environments and visual variables, designs symbols to represent geographical features by applying theories such as map recognition and taking these properties into consideration, sets special focus on the color design of navigation electronic maps, puts forward color making schemes for navigation electronic maps—three for day, and one for night, finally makes an experiment on the recognition of navigation electronic maps, and selects the most suitable one for our recommendation scheme. The result of this experiment agrees to our expected result.