lineCross function is resulting in a false positive

[Pranava29]

Hi,
The following line segments do not actually intersect but the lineCross utility is returning a false positive.

{
        "type": "LineString",
        "coordinates": [
          [
            -71.1884310511,
            42.3219864254
          ],
          [
            -71.1884310511,
            42.321998793
          ]
        ]
      }

{
        "type": "LineString",
        "coordinates": [
          [
            -71.1884310515,
            42.3221529806
          ],
          [
            -71.1884310517,
            42.3222331303
          ]
        ]
      }

[Pranava29]

@jillesvangurp , any update on this? Please let me know if you need any more analysis information.

[jillesvangurp]

I'm not actively working on this project for a few years now; limited time for side projects currently. Feel free to create a pull request to address this.

[jillesvangurp]

I finally looked into this, the lines actually do intersect but the segments do not.

• line 1 is vertical
• line2 intersects line1 at -71.1884310511,42.32199266925454
• 42.32199266925454 is in between 42.3219864254 and 42.321998793, this is why the check passes
• however, this is NOT in between 42.3221529806 and 42.3222331303 of line2 so the intersection point is outside of that. This is the bug and we need to check both line segments. Pushing a fix soon.