When discussing the attributes of GIS features, which is essential for interpretation?

Understanding the notations made on the map is essential for interpretation because notations serve as a key to deciphering the information presented within a Geographic Information System (GIS). They provide valuable context, indicating how to read symbols, colors, and markers used on the map, which reflect geographical data, attributes, and the relationships between different features. Without a clear grasp of the map's notations, a user may misinterpret the spatial information and fail to draw accurate conclusions or insights from the GIS data.

Field collector's personal observations, while they may provide valuable qualitative insights, are subjective and can vary significantly between individuals. They do not form the backbone of GIS interpretation, which is more reliant on standardized symbols and notations. The color and size of the features serve as visual cues that contribute to a user’s understanding but can be misinterpreted without contextual notations to clarify what those features represent. The historical context of the data can enrich the understanding of certain trends or changes over time but does not directly impact the immediate interpretation of the specific notation present on the map. Thus, notations are foundational for accurately conveying the intended meaning of GIS features during interpretation.