GeoViewer for the 2015 Nepal Earthquake

HDMA GeoViewer for Nepal Earthquake Disaster Response and Assistance


Free and open web app to track real-time messages, pictures, and locations from social media (Twitter) for disaster response and assistance efforts.

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The Center for Human Dynamics in the Mobile Age (HDMA) at San Diego State University developed a web-based social media mapping application, called “GeoViewer”, which can visualize the location-based social media (Twitter) in various cities and locations. This tool has collected real-time location-based tweets in Nepal and nearby areas since April 25, 2015. Users can search for the most recent tweets or historical tweets (since 4/25) by using keywords, spatial boundaries, or time. The mapping functions include hot spots, cluster maps, two base maps (OpenStreetMap and ESRI Satellite imagery layers) with adjustable transparency settings.

The GeoViewer [Geo-targeted Event Observation (GEO) Viewer] has been developed mainly by Dr. Calvin Jung (Chief Data Scientist at HDMA center) with the founding support from National Science Foundation (Award# 1416509 and #1028177), San Diego State University, and the collaboration with the County of San Diego, Office of Emergency Services (contact: Robert Barreras). Please use the GeoViewer and give us feedback about how to improve the tool for the future disaster response and assistance.


For more information, please download and read: GeoViewer: April 2015 Nepal Earthquake: A Case Study for Use in Disaster Management



Social Media Analytics Tools for AAG

The Center for Human Dynamics in the Mobile Age (HDMA) at San Diego State University has developed two innovative social media analytics tools for the coming 2015 AAG Annual Meeting in Chicago, April 21-25, 2015. The SMART dashboard can summarize hot topics, voices, retweets, and persons related to 2015 AAG event. The GeoViewer can visualize the location-based social media in Chicago nearby the Conference hotel (Hyatt Regency Hotel) and what are the hot events and voices in the neighborhood. These tools are free and public accessible.

Let’s use the #AAG2015 and #HDMA to provide the two cool tools developed by us!

Give them a look!


  1. 2015 AAG SMART Dashboard:

    You can use our SMART dashboard to find out the most popular web stories, tweets, people, and topics during the AAG meeting. The lists are dynamics updated daily (2AM in Pacific Time) by search related keywords using the Twitter Search APIs.

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  2. GeoViewer for Chicago neighborhood near the 2015 AAG conference:

    You can use the tools to search for GPS- tagged tweets in Chicago for specific keywords within a time frame or within a spatial polygon. The database is updated every 1 minute (Real-time) by using the Streaming APIs. Since we cannot control the contents of tweets or images from Twitter servers. Please be aware that some inappropriate pictures may be displayed in the Viewer. Users can select the display of tweets by text-only or image-only or both.

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Feedback and Suggestions about SMART dashboard and GeoViewer: