Journal of Geo-information Science >
Influence of Scale on Cognition of Spatial Differentiation Regularities of Population Maps
Received date: 2018-01-29
Request revised date: 2018-06-12
Online published: 2018-10-17
Supported by
National Natural Science Foundation of China, No.41471382.
Copyright
While population maps are important tools for people to perceive the regularities of population distribution, different scales of population maps cause map readers' cognitive difference in the regularities of spatial distribution of population. In this paper, eye movement parameters such as number of fixations, fixation duration and number of correct answers were selected in the population map cognitive experiment by eye movement tracking to test the significance of the difference, and the results were analyzed from the perspective of spatial differentiation regularities. By exploring the influence of different scales including province and county (city) on map readers' cognition of the distribution regularities of population, it is concluded that different scales of population maps have a significant impact on readers' perception based on the significant difference analysis. When perceiving the characteristics of spatial distribution of population and the population quantity, more details and information are provided by county (city)-scale population maps, which is beneficial to readers' understanding of the spatial differentiation regularities of population, with less average number of fixations, shorter average fixation duration, more correct number of answers for each question and higher cognitive efficiency. The impact of scale on the cognition of the population spatial distribution and the population size was discussed. The acquired cognitive rules of the scale can be used in designing the demographic maps and shortening readers' cognition time, which is convenient for readers to extract valid information from the demographic maps, thus to improve the map usability. Besides, through the analysis of eye movement parameters like the fixations points, fixation time and number of correct answers, as well as the significance test, quantitative researches of the scale effects on the population distribution were carried out. The perspective drawing of the fixations hotspot can be used to visualize the cognitive spatial differentiation of the readers. And the results are no longer limited to the simple qualitative expression, which is of great significance for the use of different scales of demographic maps to express population distribution characteristics and regularities. In addition to adopting the hierarchical mapping method to draw the population maps, this thesis also has conducted experiments on the readers' cognition of the spatial distribution regularities of population with different population density maps at different scales. Since it can reflect the population distribution more precisely and more visually, the results of this research may be further improved. And in the further work, the above population map needs further studying.
ZHANG Wanqing , ZHAO Shuning , ZHANG Dongyun , DONG Weihua . Influence of Scale on Cognition of Spatial Differentiation Regularities of Population Maps[J]. Journal of Geo-information Science, 2018 , 20(10) : 1396 -1402 . DOI: 10.12082/dqxxkx.2018.180080
Tab. 1 Experiment tasks表1 实验任务 |
任务编号 | 问题编号 | 具体任务 |
---|---|---|
T1 | a1 | 根据省级尺度人口分层设色图T1(a1)设想使人口分布差异最大的分界线 |
a2 | 根据县(市)级尺度人口分层设色图T1(a2)设想使人口分布差异最大的分界线 | |
b1 | 根据省级尺度人口分层设色图T1(b1)所给选项选择使人口分布差异最大的分界线 | |
b2 | 根据县(市)级尺度人口分层设色图T1(b2)所给选项选择使人口分布差异最大的分界线 | |
T2 | c1 | 根据省级尺度人口分层设色图T2(c1)所给选项选择人口密度最大的部分 |
c2 | 基于县(市)级尺度人口分层设色图T2(c2)所给选项选择人口密度最大的部分 |
Fig. 1 Experiment materials图1 刺激材料 |
Fig. 2 Means、SD and Sigs of indices for T1图2 T1分析指标均值、方差、显著性图 |
Tab. 2 Analysis indices and their interpretations表2 分析指标及含义 |
指标 | 含义 | |
---|---|---|
有效性 | 注视点数/个 | 任务中注视点个数 |
正确个数/个 | 每道题回答正确的被试个数 | |
效率 | 注视时间/s | 被试完成每个任务所用时间 |
注:AOI即兴趣区,在本实验中指人口分布地图 |
Fig. 3 Heat Maps (Gaze Opacity) for T1图3 T1(a1, a2, b1, b2)注视热点透视图 |
Fig. 4 Means, SD, and Sigs of indices for T2图4 T2分析指标均值、方差、显著性图 |
Fig. 5 Heat Maps (Gaze Opacity) for T2图5 T2(c1,c2)注视热点透视图 |
The authors have declared that no competing interests exist.
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