Mapping Early US Colleges and Railroad Data with ArcGIS Online

The map on this page is a combination of data on early US colleges until 1866, railroads in 1870, and population density in 1900. Pins represent each college, lines represent railroads, and green/red colored regions represent the relative population density of that area. The combination of these three data sets yields interesting results. Almost all […]

Flat Data vs. Relational Data: Which is Right for Your Purpose?

When creating a dataset, it’s important to plan ahead. What type of information will you store? Who will access it? What type of performance do you need from a database? These are important questions to ask before creating a system for your data. Stephen Ramsay addresses some of these concerns in his “Introduction to Databases” […]