Final answer:
The yellow annotation in the gigapan link is likely indicating a glacial or geological formation near Icefield Centre, Jasper National Park, known for its scenic glacial landscapes and geological features.
Step-by-step explanation:
The feature visible near Icefield Centre on Icefields Parkway, Jasper National Park, Alberta, CA is likely to be a geological or glacial formation. Jasper National Park is known for its significant glacial features, including icefields and valley glaciers which are remnants of the last Ice Age. The annotations in the gigapan link, as described, could be identifying prominent landmarks such as moraines, tool marks from glacial movement, or the glacially sculpted mountain landscapes of the park. These features are an integral part of the park's natural heritage and attract geologists and tourists alike.
It is important to use the context provided from the various sources and interpret the descriptions and images to determine the exact nature of the annotated feature. This could involve analyses such as comparing photographs from various angles, understanding descriptions of geographical formations, or utilizing maps and geological surveys of the area.