The first continuum categorizes Web sites as containing either preexisting maps or custom-tailored maps. The distinction is between those Web sites that contain maps that are already created (historically, preexisting maps were the first to appear on Web sites) versus those Web sites that allow users to interact with the data to create a map that is custom-tailored to the users' specifications.
For example, the National Park Service offers a Web site that allows users to download preexisting maps of various national parks in the United States, but does not offer users any opportunities to change a map's appearance.
In contrast, American Fectfinder offers Web-based tools that allow individuals to modify the map (eg, change the data classification system or choose a new color scheme)