Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
hypsography is a noun meaning "the scientific study of the earth's configuration above sea level (emphasizing the measurement of land altitudes relative to sea level)". It carries 2 recorded senses.
the scientific study of the earth's configuration above sea level (emphasizing the measurement of land altitudes relative to sea level)
measurement of the elevation of land above sea level
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for hypsography come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.