Journal of Geo-information Science >
Visual Analysis Design and Implementation for Group Spatiotemporal Behavior based on Indoor Position Data
Received date: 2018-05-29
Request revised date: 2018-09-24
Online published: 2019-01-20
Supported by
National Key Research and Development Program of China, No.2017YFB0503602
Grant from State Key Laboratory of Resources and Environmental Information System
The Ministry of education of Humanities and Social Science project, No.18YJCZH257
National Natural Science Foundation of China, No.41525004
Copyright
Indoor position data records the Spatiotemporal trajectory of users' activities in indoor space and is an important source of information for studying individual behavior. The similarity with the outdoor positioning data is that the space and time of the data is coupled and distributed, and the visual analysis can better reveal its regularity. However, unlike outdoor positioning data, indoor data has characteristics such as fine granularity in space and time, high positioning accuracy, and a clearer spatial relationship with POI (Point of Interest). Its trajectory is constrained by indoor facilities and space, resulting in high dimensional and irregular characteristics. The visual analysis of these data provides a basis for indoor behavior research, but also brings certain challenges. The existing visualization methods are mainly applied to outdoor positioning data, focusing on the trajectory analysis of spatiotemporal behavior itself, and often neglecting the expression of the POI semantic information with trajectory. To solve this problem, this paper first analyzed the characteristics of indoor location data, in comparison with the particularity of outdoor spatial visualization analysis. On this basis, facing spatial-temporal behavior analysis requirements for the indoor population spatial and temporal distribution, the movement mode and the correlation between related POIs of indoor population, detailed visual analysis contents, cleared the objects for visualize analysis and presentation, and design data structures . And then, this paper constructs a spatiotemporal behavior visualization analysis model from data structure, visualization method, display map and user interaction. Based on the above methods, a passenger flow visualization analysis system was designed for shopping mall with users' Wifi positioning data and implemented by use of the technology of WebGIS (Web based Geographic Information System ) and WebGL (Web Graphics Library). The system realized passenger flow analysis and display in different shops, floors and entire shopping malls in the form of two-dimensional and three-dimensional integration. Finally, correctness and effectiveness of the research results were verified through a practical example.
CHENG Dayu , QIN Kun , PEI Tao , OU Yang , WANG Meng , XU Lianming . Visual Analysis Design and Implementation for Group Spatiotemporal Behavior based on Indoor Position Data[J]. Journal of Geo-information Science, 2019 , 21(1) : 36 -45 . DOI: 10.12082/dqxxkx.2019.180248
Tab. 1 Characteristics of indoor space and position data表1 室内空间及定位数据特点 |
序号 | 室内空间特点 | 定位数据特点 |
---|---|---|
1 | 空间相对封闭、空间小 | 数据的密度高、不同个体的位置数据相似度高 |
2 | 无明显的路网、空间受限物多、约束性强 | 随意性强、时空变化快、轨迹更加复杂 |
3 | 具有空间垂向性 | 数据具有垂直重叠性 |
4 | RFID、蓝牙、WIFI及红外定位技术 | 定位精度高、与POI归属性明确 |
Tab. 2 Visual content表2 可视化内容 |
序号 | 分析类型 | 展示内容 | 维度 | 时态 |
---|---|---|---|---|
1 | 时空分布 | 密度图、GIS专题图(饼图、柱状图) | 二维、三维 | 静态、动态 |
2 | 移动模式分析 | 轨迹直接可视化、时空立方体、迁徙图 | 二维、三维 | 静态、动态 |
3 | 相关性分析 | 迁徙图、轨迹图、桑基图、弦图 | 二维、三维 | 静态、动态 |
4 | 统计量分析 | GIS专题图(唯一、分级渲染) | 二维、三维 | 静态 |
5 | 对比分析 | GIS专题图(饼图、柱状图)、力引导图、网络图 | 二维 | 静态 |
Fig. 1 Flow data structure图1 “流”可视化对象数据结构 |
Fig. 2 Visual analysis process图2 可视化分析流程 |
Fig. 3 System function diagram图3 商场客流分析系统功能 |
Fig. 4 Market indoor space display图4 商场室内空间展示 |
Fig 5 Visual Analysis of User Trajectory Display图5 用户轨迹可视化分析 |
Fig. 6 Visual analysis of passenger flow图6 客流变化可视化分析 |
Fig. 7 Visual analysis of shop relationship图7 商铺关联可视化分析 |
The authors have declared that no competing interests exist.
[1] |
|
[2] |
[
|
[3] |
[
|
[4] |
|
[5] |
[
|
[6] |
[
|
[7] |
[
|
[8] |
|
[9] |
|
[10] |
|
[11] |
[
|
[12] |
[
|
[13] |
[
|
[14] |
[
|
[15] |
|
[16] |
[
|
[17] |
[
|
[18] |
|
[19] |
[
|
/
〈 |
|
〉 |