CoverageValidator does not detect gap if tolerance is too large

[dr-jts]

The CoverageValidator may not detect narrow gaps if the gap tolerance is large relative to the input geometries. This is not ideal, since gaps may go undetected when using a tolerance that can detect large gaps.

Example

This is an extract from a dataset with much larger extent (so that a gap tolerance of say 1 seemed reasonable). The geometries contain a gap which is very narrow, between relatively short segments.

GEOMETRYCOLLECTION (
  POLYGON ((1.4021184536698854 1.655211920135038, 1.4021184539862759 1.6552119201560487, 1.4021299999999997 1.6559219999999968, 1.4021410000000003 1.6566259999999957, 1.4021410000000003 1.658296, 1.406 1.654, 1.4021184536698854 1.655211920135038)), 
  POLYGON ((1.406 1.654, 1.4 1.65, 1.4021410000000003 1.658296, 1.4021410000000003 1.6566259999999957, 1.4021365939839114 1.6563440149706494, 1.4021299996998664 1.6559220002002917, 1.4021184536698854 1.655211920135038, 1.406 1.654)))

Using a gap tolerance of 0.00001 detects the gap, but larger tolerances do not.