Word origin · etymology
Editorial English navigation title.
Geometry derives from Greek earth-measurement vocabulary; conventions means agreed rules. This heading names how charts are drawn and divided.
How we know · epistemology
Editorial subject classification
“Chart geometry & conventions” is a browsing category chosen for this atlas. Its child entries share a topic or practical connection. This grouping is not evidence that all of them descend from one historical lineage; transmission claims require separate sources.
Connected concepts
Sources & provenance
Use the citations beside each section to distinguish a calculation convention, a historical teaching and an editorial example.