Journal of Geo-information Science >
Case Analysis and Context Modeling of Location Map
Received date: 2013-08-13
Request revised date: 2013-10-17
Online published: 2014-09-04
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In recent years, with the rapid development of location-based services, significant changes have taken place on location maps which are considered as new map products in research context compared with the general map. Those changes expand location map’s research areas and scope. This paper is mainly divided into three parts. First of all, it analyzes the relationship between context theory and location map, and points out the significance of context theory in location services especially in the application of location map. Then, it develops the context model, which has two main problems in mobile services: one is that different context information is not relevant, the other is that it is difficult to realize the context inference. So we should analyze the role of activity information in context modeling according to its importance. Also it establishes the logical structure of the location map’s context model by using the formal description language “ontology”, proposing the three-layer model of location map which is based on active layer, researching the content and features of activity model, behavior model and context information model, and giving further analysis on the relationships between activity model and different behaviors as well as the relationships between behavior model and various context information. Finally, this paper gives an example about a user’s check-in behavior at the airport to validate the process and methods of location map’s context model that described above.
Key words: context theory; activity; location map; context modeling; ontology
QI Xiaofei , WANG Guangxia , CUI Xiufei , ZHANG Lan . Case Analysis and Context Modeling of Location Map[J]. Journal of Geo-information Science, 2014 , 16(5) : 712 -719 . DOI: 10.3724/SP.J.1047.2014.00712
Fig.1 Digital map and location map图1 数字地图与位置地图 |
Fig.2 Activity-based three-tier model of the location map图2 基于活动分层的位置地图三层模型 |
Tab.1 Different usage behaviors of the location map表1 位置地图中的不同使用行为 |
行为 | 描述 |
---|---|
定位 | 使用者或某个对象的位置(一般是一个) |
导航 | 怎样从一个位置到另一个位置 |
查询 | 使用者或相关对象的位置和信息(一般是多个) |
识别 | 是什么?是谁 |
事件检查 | 发生了什么(交通事故,突发时间等) |
Fig.3 Three models of the activity relationship图3 活动模型中的3种关联关系 |
Fig.4 Contextual information of the positioning behavior图4 影响定位行为的情境信息 |
Fig.5 Contextual information of the navigation behavior图5 影响导航行为的情境信息 |
Fig.6 Contextual information of the query behavior图6 影响查询行为的情境信息 |
Fig.7 Contextual information of the recognition behavior图7 影响识别行为的情境信息 |
Fig.8 Contextual information of the checking events behavior图8 影响事件检查行为的情境信息 |
Fig.9 Schematic diagram of the location map context model图9 位置地图的情境模型示意图 |
Fig.10 Activity structure of the airport boarding context图10 机场登机情境中的活动结构图 |
Fig.11 Modeling of the navigation and contextual information (part)图11 导航与情境信息建模(部分) |
Fig.12 Contextual information ontology model of the airport boarding context (part)图12 机场登机情境中的情境信息本体模型(部分) |
The authors have declared that no competing interests exist.
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