on January 9, 2023

Turf intersect doesn’t always work with polygons

Geographic Information Systems

Can polygon lines intersect?

Polygons can intersect in three ways: Overlap—Area of overlap can be produced by leaving the Output Type to its default value (LOWEST). Common boundary/touch at a line—This type of intersection can be produced by specifying LINE as the Output Type.

Do polygons intersect with other sides?

A polygon is a closed figure where the sides are all line segments. Each side must intersect exactly two others sides but only at their endpoints. The sides must be noncollinear and have a common endpoint.

How do you intersect two polygons?

Intersection of Convex Polygons Algorithm

  1. Create an empty polygon as P.
  2. Add all corners of Polygon1 that is inside Polygon2 to P.
  3. Add all corners of Polygon2 that is inside Polygon1 to P.
  4. Add all intersection points to P.
  5. Order all points in the P counter-clockwise.

Dec 3, 2018

What is the point of intersection of a polygon?

What is the point of intersection of two sides of a polygon? Hi Tyler. Formally, mathematicians call them vertices (plural for vertex). But more casually, we just call them corners.

What are the 3 rules of a polygon?

The sides must be straight. Polygons may have any number of sides. A shape with curved sides is not a polygon. A shape that is not fully closed is not a polygon.

Do polygons intersect themselves?

A polygonal boundary may be allowed to cross over itself, creating star polygons and other self-intersecting polygons.

How do you tell if a line intersects a polygon?

Line crosses the polygon if and only if it crosses one of its edges (ignoring for a second the cases when it passes through a vertex). So, in your case you just need to test all edges of your polygon against your line and see if there’s an intersection. and then calculate the value Ax + By + C for points a and b .
May 18, 2011

Which type of polygon has only one boundary and does not intersect?

Simple Polygons

Simple Polygons



A simple polygon has only one boundary, and it doesn’t cross over itself. The sides of a simple polygon do not intersect.

Can there be gaps between polygons in topology?



Quote from video:

Where does a line intersect a polygon?

Line crosses the polygon if and only if it crosses one of its edges (ignoring for a second the cases when it passes through a vertex). So, in your case you just need to test all edges of your polygon against your line and see if there’s an intersection.
May 18, 2011

Can polygons cross each other?

Polygons with congruent sides and angles are regular; all others are irregular. Polygons with all interior angles less than 180° are convex; if a polygon has at least one interior angle greater than 180°, it is concave. Simple polygons do not cross their sides; complex polygons have self-intersecting sides.
Mar 20, 2019

Does a pentagon have intersecting lines?

Pentagons can be simple or self-intersecting. A simple pentagon (5-gon) must have five straight sides that meet to create five vertices but do not intersect with each other. A self-intersecting regular pentagon is called a pentagram.