Interface design reference

[jywarren]

Copied over from @ebarry's comment at publiclab/plots2#650

• when dragging the map, the highlighted box should change while you drag. The crosshairs stay fixed in the middle.
• The highlighted box should be red (or hot pink, something bright).
• We must provide two ways -- text and map -- to input as well as to display location. That's why my gif shows "This is what others will see" for both text and map display, for either way of inputting location. When we are displaying content, we may choose to ether print the location in text, or to show the entire map. We still need to think through when we'd choose which format.