Yesterday's tragic shooting in a Texas high school was the 101st mass shooting incident in the USA this year. You can see the locations of all 101 mass shootings on ABC 15's interactive map. The map plots every mass shooting incident so far this year according to the Gun Violence Archive's database.
The Gun Violence Archive is also the data source for Vox's interactive map of Mass Shootings Since Sandy Hook. Vox's map shows the locations of all 1,686 mass shootings that have occurred in the U.S. since Sandy Hook in 2012.
Esri's School Shootings Map concentrates only on those mass shootings which have occurred in schools. This map shows every school mass shooting since Columbine in 1999. Esri's map uses the Washington Post’s database of school shootings, which has had to be continually updated since 1999.
Esri's map is the best map of the three. It's use of scaled markers shows the number of casualties at each incident. Unfortunately, because mass school shootings have now become so common place in the USA, the Esri map could now use a timeline feature. This would enable users to filter the results shown by date to get a sense of whether school shootings in America are really becoming more frequent year by year.
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