Graphic method for retrieval of quantitative data from computer-mapped qualitative information, with a NASA video as an example

A metrological reflection on uncertainty about the use of maps instead of global parameters

“…Conversely, getting back from the map to a list of numerical values is always possible with due precautions via informatics mean, as done by the author in a couple of their other cases [2,3]. This is an additional bonus for the curious scientist that likes/needs to retrieve the numerical values for his or her mathematical analyses.…”

“…with the same temperature, the one assigned to that colour. That possibility has been tested by the author in two circumstances, one for the global snow/ice covering of the surface [2], and the other one for the iso-colour surfaces using as the unit the pixel for comparing the SAMT value obtained with the one found in the literature, requiring in that case to use the values from an iso-surface projection, the Peters', corrected from a Robinson one. [3] Table 1 reports the comparison for the two representations.…”

“…Here, the reflections will be restricted to a comparison between the above common tool of using global parameters and the use of a different tool for the same purpose of evaluation, consisting in the use of maps of the parameters in question over the whole spatial dimension of the Earth surface against the uncertainty factor. The author has already used this tool in a couple of his studies [2,3] and checked its efficacy.…”