I’ve joined a csv file of values (0-100) (created in Excel), with local authority boundaries for the UK in ArcMap 10.1. I want to display the percentage of these areas not receiving 3G mobile coverage.
I’ve gone into properties and then selected quantities. I’ve selected the data I want to display and it displays huge values which are not in either the original data set or in the attributes table. Why is this? Here is a screen shot (note the range):
When I go into the attributes table for the selected variable (‘t’) and then sort descending, the largest value is 99. Why does it think there are values up to 1965621253?
I’ve not managed to find an answer online but so far I’ve:
- Checked that Excel isn’t adding on extra values (I copied and pasted just the values numerous times)
- Generated a new csv file
- Tried to join the data numerous times to see if this made a difference.