Compared with the traditional spatial data model and method, global subdivision grid show a great advantage in the organization and expression of massive spatial data. In view of this, a method of vector map multi-scale representation considering user interest on subdivision gird is proposed. First, the spatial interest field is built using a large number POI data to describe the spatial distribution of the user interest in geographic information. Second, spatial factor is classified and graded, and its representation scale range can be determined. Finally, different levels of subdivision surfaces are divided based on GeoSOT subdivision theory, and the corresponding relation of subdivision level and scale is established. According to the user interest of subdivision surfaces, the spatial feature can be expressed in different degree of detail. It can realize multi-scale representation of spatial data based on user interest. The experimental results show that this method can not only satisfy general-to-detail and important-to-secondary space cognitive demands of users, but also achieve better multi-scale representation effect.
YU Tong
,
DENG Shujun
,
QIAN Haizhong
,
YANG Qingli
. A Method of Vector Map Multi-scale Representation Considering User Interest on Subdivision Gird[J]. Acta Geodaetica et Cartographica Sinica, 2016
, 45(S1)
: 127
-134
.
DOI: 10.11947/j.AGCS.2016.F016
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