Construct validity refers to validity of the ideas and concepts used in the research. Constructs are âconceptsâ and âideasâ. This particular validity is often problematic and not clear cut. There is a subjective (interpretive) element in it that makes it somewhat debatable.
The divergence of scale at the poles is a major weakness of the Mercator projection, rendering it unsuitable at high latitudes. Login or Sign Up to answer this question. data-config-site-section=chacha>. What is a Mercator projection A Mercator projection is a mathematical method of showing a map of the globe on a...
Imperfections or artifacts can occur and can affect measurements considerably. Recall Rule 2: Minimize noise in each projection image. Noise can appear as speckles in slice images, but can be minimized by maximizing the X-ray dose. There is also non-linear detector noise in projection images that stays in the same position for all projection images.