equalsIdentical

Returns true if geometries a and b are of the same type and have exactly the same vertices in the same order on the XYZM plane.

Vertices are checked by index so any additional midpoint or reversed order results in the geometries not being considered equal.

NaN values are considered to be equal to other NaN values.

Parameters

Name	Type	Description
a	Geometry	First geometry
b	Geometry	Second geometry

Returns

boolean

true if geometries a and b are of the same type and have matching vertices

See also

• equals checks if two geometries are topologically equal
• equalsExact checks whether two geometries are of the same type and have the same vertices in the same order on the XY plane
• GeometryRef#normalize normalized geometries are easier to compare

Examples

const a = lineString([ [ 0, 0, 100 ], [ 8, 0, 101 ] ]);

const t1 = equalsIdentical(a, lineString([ [ 0, 0, 100 ], [ 8, 0, 101 ] ]));

// wrong type
const f1 = equalsIdentical(a, multiLineString([ [ [ 0, 0, 100 ], [ 8, 0, 101 ] ] ]));
// missing Z value
const f2 = equalsIdentical(a, lineString([ [ 0, 0 ], [ 8, 0 ] ]));
// wrong Z value
const f3 = equalsIdentical(a, lineString([ [ 0, 0, 100 ], [ 8, 0, 102 ] ]));
// extra midpoint
const f4 = equalsIdentical(a, lineString([ [ 0, 0 ], [ 4, 0 ], [ 8, 0 ] ]));
// reversed order -> wrong first point
const f5 = equalsIdentical(a, lineString([ [ 8, 0, 101 ], [ 0, 0, 100 ] ]));

const a = lineString([ [ 0, 0, 100 ], [ 8, 0, 101 ] ]); const t1 = equalsIdentical(a, lineString([ [ 0, 0, 100 ], [ 8, 0, 101 ] ])); // wrong type const f1 = equalsIdentical(a, multiLineString([ [ [ 0, 0, 100 ], [ 8, 0, 101 ] ] ])); // missing Z value const f2 = equalsIdentical(a, lineString([ [ 0, 0 ], [ 8, 0 ] ])); // wrong Z value const f3 = equalsIdentical(a, lineString([ [ 0, 0, 100 ], [ 8, 0, 102 ] ])); // extra midpoint const f4 = equalsIdentical(a, lineString([ [ 0, 0 ], [ 4, 0 ], [ 8, 0 ] ])); // reversed order -> wrong first point const f5 = equalsIdentical(a, lineString([ [ 8, 0, 101 ], [ 0, 0, 100 ] ]));