C, the number of countries.
R, the number of regions.
The number of cities.
N, every place: countries, regions and cities.
Length countryCount + 1; prefix[c] = number of regions before country c.
Length totalRegions + 1; prefix[r] = number of cities before region r.
The header's keyframe_exp (Section 7.3).
Absolute file offset of each name block's compressed bytes.
Compressed byte length of each name block.
The place table's uncompressed part (Section 7.2), parsed: the place counts and where each name block is.