In class, we explored the project The Spread of Slavery in the US by Lincoln Mullen, which is basically a map that shows the spread of U.S. Slavery during 1790-1860. I found that answering historical question by using geospatial visualization is really convenient, geospatial visualization and analysis is an easier way to deliver the message in a geographic space.
Taking an example of The Spread of Slavery in the US by Lincoln Mullen, this multi-dimensional map shows the population, location, and time of slavery in the U.S., it also used ten colors from shallow to dark to represent enslaved population. In addition, I can also click on the map to see a certain area with more details, such as the total enslaved population and free population of Knox, Kentucky. Therefore, I think geospatial visualization and analysis helps readers understand the process of slavery spread in different time and different places more easily than just reading text content.
Considering the pitfalls of geospatial visualization and analysis, using false maps and inaccurate navigation are two of them. Because the map is changing over the time period, so it is important to use the correct one in certain time period.