New module proposal @turf/line-overlap

[DenisCarriere]

New module proposal @turf/line-overlap

Returns a collection of intersecting lines that are mutually shared between two lines and/or polygons.

Reason for module: One step closer to removing jsts as a dependency (@turf/intersect test - linestring.geojson) & used to detect if Inner polygons are sharing the same borders of outer polygons when applying @turf/polygon-slice.

Valid input Geometry

• LineString
• MultiLineString
• Polygon
• MultiPolygon
• FeatureCollection

JSDocs

/**
 * @name lineOverlap
 * @param {FeatureCollection|Feature<LineString|Polygon|MultiLineString|MultiPolygon>} line1 any LineString or Polygon
 * @param {FeatureCollection|Feature<LineString|Polygon|MultiLineString|MultiPolygon>} line2 any LineString or Polygon
 * @returns {FeatureCollection<LineString>} intersecting lines that share borders between both features
**/

Examples

• Blue lines (GeoJSON inputs)
• Red lines (intersections/line that share borders)

Any thoughts?

CC: @rowanwins

[rowanwins]

Nice work @DenisCarriere , I imagine this could be handy in a number of cases (although none of them come to me right now!), I'll get it added into the docs when it gets merged in.

Re removing JSTS the martinez repo got an update the other day so it's more stable than it used to be (although don't look at the online demo as that hasn't been updated) so it's a contender for modules like intersection, union, difference, xor.

[DenisCarriere]

👍 Thanks for your feedback @rowanwins , this module might be slightly on the abstract side, however one scenario that comes to mind is:

• Detecting if one road overlaps other roads (JOSM warning - Overlapping highways)

[DenisCarriere]

Really cool! The martinez library looks pretty solid (from the readme)