If I buffer hundreds of unprojected WGS84 points across the US by say, 3 miles, will I get accurate areas returned (3 x pi x r) for each of the circles created? I suspect not. If not, what would be some best practice to minimize error for each buffer.
Basically, I'd like to minimize error across the US (perhaps including Hawaii) and processing time (in ArcGIS, for instance).
For context, my goal is to extract demographics (also in unprojected geography) for each point lying within a constant distance of each point for the entire nation. My fear is that using unprojected data for this task means that if I'm comparing the demographic info captured by each buffer, I'm not comparing apples to apples.
Any help is appreciated. Thank you.