6,416,947 invalid linestrings in _USA.tsv

[jmealo]

Hello,

There's a large number of invalid linestrings in the _USA.tsv file that only contain a single point or are self-referencing.

Only about 88% of the rows in the US file are valid line strings.

• _USA.tsv = 54,484,737
• Valid geometries = 48,067,790
• Invalid geometries (or points): 6,416,947 (according to @turf/boolean-valid)

ST_IsValid returns false for an additional: 211,991 rows on top of that

Additionally, providing the file as a WKT representation per line would be easier for many folks to load into their database and is much smaller on disk.

Thanks, Jeff

[jmealo]

This is a duplicate of #11