What vector geometry should be used to represent the Seine River in a large-scale map of Paris?

The most appropriate vector geometry to represent the Seine River on a large-scale map of Paris is a line feature. Rivers are typically depicted as linear features because they primarily have length with a relatively small width compared to their length. A line representation effectively captures the flow and path of the river, allowing for accurate visualization of its course through the landscape.

Using a multipoint feature is not suitable for rivers since this would imply a discrete collection of points rather than a continuous flow. Similarly, representing the river as a polygon could mislead users about its physical characteristics, as a polygon would imply an area rather than a line of flow. Lastly, a multipart polygon representation could complicate the visualization unnecessarily, given that a river generally does not have discrete, enclosed areas to warrant such representation.

In summary, using a line to depict the Seine River captures its essence as a major linear water feature in the landscape, providing clarity and accuracy in a map representation.