Spatiotemporal Change Analysis of Earthquake Emergency Information Based on Microblog Data: A Case Study of the “8.8” Jiuzhaigou Earthquake

ISPRS International Journal of Geo-Information

Junming Liu¹  Wei Su²  Ziyao Xing²  Xiaodong Zhang²  Xiaohui Su³ 

[1] Technology, Beijing Forestry University, Beijing 100083, China;College of Land Science and Technology, China Agricultural University, Beijing 100083, China;;School of Information Science &

关键词: earthquake emergency;    microblog;    spatial autocorrelation;    urgency degree;    spatiotemporal change;   

DOI  :  10.3390/ijgi8080359

来源: DOAJ

【 摘 要 】

Information from social media microblogging has been applied to management of emergency situations following disasters. In particular, such blogs contain much information about the public perception of disasters. However, the effective collection and use of disaster information from microblogs still presents a significant challenge. In this paper, a spatial distribution detection method is established using emergency information based on the urgency degree grading of microblogs and spatial autocorrelation analysis. Moreover, a character-level convolutional neural network classifier is applied for microblog classification in order to mine the spatio-temporal change process of emergency rescue information. The results from the Jiuzhaigou (Sichuan, China) earthquake case study demonstrate that different emergency information types exhibit different time variation characteristics. Moreover, spatial autocorrelation analysis based on the degree of text urgency can exclude uneven spatial distribution influences of the number of microblog users, and accurately determine the level of urgency of the situation. In addition, the classification and spatio-temporal analysis methods combined in this study can effectively mine the required emergency information, allowing us to understand emergency information spatio-temporal changes. Our study can be used as a reference for microblog information applications within the field of emergency rescue activity.

【 授权许可】

Unknown