Naval ports. Again, a miniscule fraction of the earth's surface. Coverage so sparse that it wouldn't register on a percentage scale with four places after the d

Naval ports. Again, a miniscule fraction of the earth's surface. Coverage so sparse that it wouldn't register on a percentage scale with four places after the decimal point. You can't "accurately infill" data that hasn't been measured. What prevailed over far more than 99% of the earth's land and sea surface was unknown to any degree of accuracy before 1979; what prevailed in the depths of the massive heat sink called the ocean was not even partially addressed before ca. 2005. I'm not judging what you know about "S". My profession is both "T" and "E". I do suspect that you don't know much about "M".