diff --git a/dart/geobase/lib/src/coordinates/base/bounded.dart b/dart/geobase/lib/src/coordinates/base/bounded.dart
index 3680ad1..f7a86a4 100644
--- a/dart/geobase/lib/src/coordinates/base/bounded.dart
+++ b/dart/geobase/lib/src/coordinates/base/bounded.dart
@@ -4,7 +4,6 @@
 //
 // Docs: https://github.com/navibyte/geospatial
 
-import '/src/constants/epsilon.dart';
 import '/src/coordinates/base/box.dart';
 import '/src/coordinates/projection/projection.dart';
 
@@ -91,50 +90,4 @@ abstract class Bounded extends Positionable {
   /// projecting position data. If [bounds] is null, then it's null after
   /// projecting too.
   Bounded project(Projection projection);
-
-  /// True if this and [other] contain exactly same coordinate values (or both
-  /// are empty) in the same order and with the same coordinate type.
-  bool equalsCoords(covariant Bounded other);
-
-  /// True if this and [other] equals by testing 2D coordinate values of all
-  /// position data (that must be in same order in both objects) contained
-  /// directly or by child objects.
-  ///
-  /// Returns false if this and [other] are not of the same subtype.
-  ///
-  /// Returns false if this or [other] contain "empty geometry"
-  /// ([isEmptyByGeometry] true).
-  ///
-  /// Differences on 2D coordinate values (ie. x and y, or lon and lat) between
-  /// this and [other] must be within [toleranceHoriz].
-  ///
-  /// Tolerance values must be positive (>= 0.0).
-  bool equals2D(
-    covariant Bounded other, {
-    double toleranceHoriz = defaultEpsilon,
-  });
-
-  /// True if this and [other] equals by testing 3D coordinate values of all
-  /// position data (that must be in same order in both objects) contained
-  /// directly or by child objects.
-  ///
-  /// Returns false if this and [other] are not of the same subtype.
-  ///
-  /// Returns false if this or [other] contain "empty geometry"
-  /// ([isEmptyByGeometry] true).
-  ///
-  /// Returns false if this or [other] do not contain 3D coordinates.
-  ///
-  /// Differences on 2D coordinate values (ie. x and y, or lon and lat) between
-  /// this and [other] must be within [toleranceHoriz].
-  ///
-  /// Differences on vertical coordinate values (ie. z or elev) between
-  /// this and [other] must be within [toleranceVert].
-  ///
-  /// Tolerance values must be positive (>= 0.0).
-  bool equals3D(
-    covariant Bounded other, {
-    double toleranceHoriz = defaultEpsilon,
-    double toleranceVert = defaultEpsilon,
-  });
 }
diff --git a/dart/geobase/lib/src/coordinates/base/box.dart b/dart/geobase/lib/src/coordinates/base/box.dart
index 9e01313..547261a 100644
--- a/dart/geobase/lib/src/coordinates/base/box.dart
+++ b/dart/geobase/lib/src/coordinates/base/box.dart
@@ -452,12 +452,17 @@ abstract class Box extends ValuePositionable {
   /// box when forward-projecting, and other way when inverse-projecting).
   Box project(Projection projection);
 
+  /// True if this and the [other] box equals.
+  @override
+  bool equalsCoords(Box other) => this == other;
+
   /// True if this box equals with [other] by testing 2D coordinates only.
   ///
   /// Differences on 2D coordinate values (ie. x and y, or lon and lat) between
   /// this and [other] must be within [toleranceHoriz].
   ///
   /// Tolerance values must be positive (>= 0.0).
+  @override
   bool equals2D(Box other, {double toleranceHoriz = defaultEpsilon}) =>
       Box.testEquals2D(this, other, toleranceHoriz: toleranceHoriz);
 
@@ -472,6 +477,7 @@ abstract class Box extends ValuePositionable {
   /// this and [other] must be within [toleranceVert].
   ///
   /// Tolerance values must be positive (>= 0.0).
+  @override
   bool equals3D(
     Box other, {
     double toleranceHoriz = defaultEpsilon,
diff --git a/dart/geobase/lib/src/coordinates/base/position.dart b/dart/geobase/lib/src/coordinates/base/position.dart
index d23f12f..d700386 100644
--- a/dart/geobase/lib/src/coordinates/base/position.dart
+++ b/dart/geobase/lib/src/coordinates/base/position.dart
@@ -423,12 +423,17 @@ abstract class Position extends ValuePositionable {
   /// The returned object should be of the same type as this object has.
   Position transform(TransformPosition transform);
 
+  /// True if this and the [other] position equals.
+  @override
+  bool equalsCoords(Position other) => this == other;
+
   /// True if this position equals with [other] by testing 2D coordinates only.
   ///
   /// Differences on 2D coordinate values (ie. x and y, or lon and lat) between
   /// this and [other] must be within [toleranceHoriz].
   ///
   /// Tolerance values must be positive (>= 0.0).
+  @override
   bool equals2D(
     Position other, {
     double toleranceHoriz = defaultEpsilon,
@@ -446,6 +451,7 @@ abstract class Position extends ValuePositionable {
   /// this and [other] must be within [toleranceVert].
   ///
   /// Tolerance values must be positive (>= 0.0).
+  @override
   bool equals3D(
     Position other, {
     double toleranceHoriz = defaultEpsilon,
diff --git a/dart/geobase/lib/src/coordinates/base/position_series.dart b/dart/geobase/lib/src/coordinates/base/position_series.dart
index ca4d870..bfcc931 100644
--- a/dart/geobase/lib/src/coordinates/base/position_series.dart
+++ b/dart/geobase/lib/src/coordinates/base/position_series.dart
@@ -493,6 +493,7 @@ abstract class PositionSeries implements ValuePositionable {
 
   /// Returns true if this and [other] contain exactly same coordinate values
   /// (or both are empty) in the same order and with the same coordinate type.
+  @override
   bool equalsCoords(PositionSeries other) {
     if (identical(this, other)) return true;
     if (positionCount != other.positionCount) return false;
@@ -522,6 +523,7 @@ abstract class PositionSeries implements ValuePositionable {
   /// this and [other] must be within [toleranceHoriz].
   ///
   /// Tolerance values must be positive (>= 0.0).
+  @override
   bool equals2D(
     PositionSeries other, {
     double toleranceHoriz = defaultEpsilon,
@@ -563,6 +565,7 @@ abstract class PositionSeries implements ValuePositionable {
   /// this and [other] must be within [toleranceVert].
   ///
   /// Tolerance values must be positive (>= 0.0).
+  @override
   bool equals3D(
     PositionSeries other, {
     double toleranceHoriz = defaultEpsilon,
diff --git a/dart/geobase/lib/src/coordinates/base/positionable.dart b/dart/geobase/lib/src/coordinates/base/positionable.dart
index 27f346e..e627a44 100644
--- a/dart/geobase/lib/src/coordinates/base/positionable.dart
+++ b/dart/geobase/lib/src/coordinates/base/positionable.dart
@@ -5,6 +5,7 @@
 // Docs: https://github.com/navibyte/geospatial
 
 import '/src/codes/coords.dart';
+import '/src/constants/epsilon.dart';
 
 /// A positionable object contains data structures for (geospatial) position
 /// data, directly or within child objects.
@@ -30,4 +31,48 @@ abstract class Positionable {
   /// `Coords.xym`, then `Coords.xy` is returned. When all items are
   /// `Coords.xyz`, then `Coords.xyz` is returned.
   Coords get coordType;
+
+  /// True if this and [other] contain exactly same coordinate values (or both
+  /// are empty) in the same order and with the same coordinate type.
+  bool equalsCoords(covariant Positionable other);
+
+  /// True if this and [other] equals by testing 2D coordinate values of all
+  /// position data (that must be in same order in both objects) contained
+  /// directly or by child objects.
+  ///
+  /// Returns false if this and [other] are not of the same subtype.
+  ///
+  /// Returns false if this or [other] contain "empty geometry".
+  ///
+  /// Differences on 2D coordinate values (ie. x and y, or lon and lat) between
+  /// this and [other] must be within [toleranceHoriz].
+  ///
+  /// Tolerance values must be positive (>= 0.0).
+  bool equals2D(
+    covariant Positionable other, {
+    double toleranceHoriz = defaultEpsilon,
+  });
+
+  /// True if this and [other] equals by testing 3D coordinate values of all
+  /// position data (that must be in same order in both objects) contained
+  /// directly or by child objects.
+  ///
+  /// Returns false if this and [other] are not of the same subtype.
+  ///
+  /// Returns false if this or [other] contain "empty geometry".
+  ///
+  /// Returns false if this or [other] do not contain 3D coordinates.
+  ///
+  /// Differences on 2D coordinate values (ie. x and y, or lon and lat) between
+  /// this and [other] must be within [toleranceHoriz].
+  ///
+  /// Differences on vertical coordinate values (ie. z or elev) between
+  /// this and [other] must be within [toleranceVert].
+  ///
+  /// Tolerance values must be positive (>= 0.0).
+  bool equals3D(
+    covariant Positionable other, {
+    double toleranceHoriz = defaultEpsilon,
+    double toleranceVert = defaultEpsilon,
+  });
 }
diff --git a/dart/geobase/test/coordinates/position_test.dart b/dart/geobase/test/coordinates/position_test.dart
index dd9b7fd..362aa4c 100644
--- a/dart/geobase/test/coordinates/position_test.dart
+++ b/dart/geobase/test/coordinates/position_test.dart
@@ -677,6 +677,9 @@ class _TestXYZM implements Projected {
   @override
   String toString() => '$x,$y,$z,$m';
 
+  @override
+  bool equalsCoords(Position other) => this == other;
+
   @override
   bool equals2D(
     Position other, {