Supporting Spatio Aggregation Analysis

The purpose of this demo is to show how to use ASTERIX to support analysis of location-based information. The prototype is using a Twitter data set of 0.5 million US tweets mentioning the keyword "allergy" from 05/15/2011 to 07/13/2011. After a user selects an area or location on the map, a latitude and longitude increment, and any other desirable constraints, the system will execute an ASTERIX query that generates an overlay grid of density information on the map to show the number of tweets in each cell.

To use the demo, choose the latitude and longitude increments that represent the size of the grid cells. Their default values are 3.0. Specify a rectangle area as follows. First use the mouse to click the first corner of the area, then move the mouse to the second corner and click again. The system will then run a query and generate a color-coded density grid on the map. The color of each cell indicates the number of tweets in the cell. The corresponding ASTERIX query will be available via the "show query" button.

For questions about this work, please contact Sattam Alsubaiee or Zachary Heilbron.