Data Viz text change

[loriabendroth]

@akrherz , on this page: https://datateam.agron.iastate.edu/td/dl/#tab_wdata

• [x] Reword first sentence to be: "Select the sites and practices of interest for visualization by reference these maps."
• [x] Delete second sentence
• [x] Bring the two sentences under the static map, up to follow the first sentence so all the map text is together.

[loriabendroth]

Mistake in my initial sentence. @akrherz can you change "...by reference these maps..." to "...by referencing these maps..."

Otherwise looks good