Esri ArcGIS Pro Foundation Certification Practice Test

When creating a large-scale map of a river, which vector geometry represents the river accurately?

1. A polygon, representing the river

2. A multipart polygon, representing the river

3. A multipoint feature, representing the sides of the river

4. A line, representing the river

The correct answer is: A line, representing the river

A line geometry is the most accurate representation for a river in a large-scale map context. This is because rivers generally have a length that is significantly greater than their width, and using a line captures their natural flow and direction. Lines are ideal for depicting linear features such as rivers, roads, and streams because they convey the spatial relationship and connectivity between points along the river’s path without implying any additional area or boundary that would be associated with polygons. In contrast, polygons, whether single or multipart, imply an area and are more suited for features that occupy space, such as lakes or land masses. A multipoint feature does not provide the necessary continuity and flow representation that a line geometry offers. Therefore, when trying to create an accurate and effective depiction of a river on a map, utilizing line geometry will provide the clearest and most meaningful visualization for the viewer.