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...
Define Projection Tool. âDefine Projectionâ in ArcGIS is what you use when the data has no defined coordinate system. The ArcGIS error message would look like: âUnknown Spatial Referenceâ. When you run the âDefine Projectionâ tool, the tool does not change the projection. It only changes the metadata describing the current projection of the dataset. FYI: The metadata that this tool creates is a .prj, .tfw, .aux within your existing dataset.