Worked on a project a number of years back to determine what would be inundated if a dam broke. You'd be surprised at how much work goes into flood plain mapping. It's not just drawing a line on a map along a stream.

And the surveying of political boundaries is very much science. Hell, the North Carolina / South Carolina was recently re-mapped, with interesting results.

The demarcation of the Mason-Dixon line was an extraordinary act of surveying involving regular astronomic observations. Oh, and you know you have to calculate that your plumb line will deviate by a few seconds of a degree due to the mountain you are traversing, right?

I've got a few hundred different coordinate systems in my GIS software.

Geography isn't a science?

Hogwash.