A Model and Algorithm of Dynamic Map Expression and its Application
Abstract: On the basis of
summarizing the research results of visual variables, we define six dynamic
visual variables of the map symbol in this paper. We analyze the related
attributes of dynamic symbols, and then construct a dynamic map expression
model based on symbols. A key technology to realize dynamic expression, the key
frame transform algorithm is present in the paper. The cartography process of
the urban population proportion dynamic change map of the cities in Shandong
province are taken as an example to demonstrate the methods and process of
dynamic mapping based on the above map dynamic expression theories and models,
which includes base map digitization, sorting and processing of attribute data,
adding the map elements, the creation of special dynamic effect such as color
transform, continuous flashing and object moving, and realization of
interactive function. Finally, the paper shows the dynamic map of sea level
rising influence on Qingdao, the Typhoon Soulik traveling map and other dynamic
map effect at the end of the article.
Keywords: spatial
visualization, dynamic expression model, key frame transform algorithm, dynamic
visual variable, interactive function
Author: Wanwu Li
Journal Code: jptkomputergg170119
