I download GRUMP 2000 population count data set. It sees that maximum population count is 1,346,772 in the cell of that data set. I would like to know that is right or not, because I think that the value is very large. Could you give me advice about maximum population count in GRUMP?

The number indicated in your query is much higher than the expected value. The maximum cell value for GRUMP 2000 population count unadjusted grid is about 117,931.680 and adjusted grid (to match UN country totals) is about 136,044.266.

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