Load Dataset #4

[brian-stinar]

1997-2014, Lead & Coal.xlsx

[tgebhart]

Use this one for full coverage of lat/lon (via WGS_X, WGS_Y). FYI: all accidents occur at approximately the same location.

1997-2014.Lead.Coal.Updated.xlsx

[brian-stinar]

This is in datasets/dataset4.

I'm assigning to @ValeMeza to finish this.