diff --git a/planar/triangulate/triangulate.go b/planar/triangulate/triangulate.go
new file mode 100644
index 00000000..224adfb9
--- /dev/null
+++ b/planar/triangulate/triangulate.go
@@ -0,0 +1,45 @@
+package triangulate
+
+import (
+	"context"
+
+	"github.com/go-spatial/geom"
+)
+
+// Triangulator describes an object that can take a set of points and produce
+// a triangulation.
+type Triangulator interface {
+
+	// SetPoints sets the nodes to be used in the triangulation, this will replace
+	// any current points in the triangulation
+	SetPoints(ctx context.Context, points ...geom.Point) error
+
+	// Triangles returns the triangles that are produced by the triangulation
+	Triangles(ctx context.Context, includeFrame bool) ([]geom.Triangle, error)
+}
+
+// IncrementatlTriangulator describes an triangulation where points can be
+// incrementally added.
+type IncrementalTriangulator interface {
+	Triangulator
+
+	// InsertPoint inserts a point into an existing triangulation
+	InsertPoints(ctx context.Context, points ...geom.Point) error
+}
+
+// ConstrainedTriangulator is a Triangulator that can take a set of points and ensure that the
+// given set of edges (the constraints) exist in the triangulation
+type ConstrainedTriangulator interface {
+	Triangulator
+
+	// AddConstraints adds constraint lines to the triangulation, this may require
+	// the triangulation to be recalculated.
+	AddConstraints(ctx context.Context, constraints ...geom.Line) error
+}
+
+// ConstrainedIncrementalTriangulator is an Incremental Triangulator that can take a set of points and ensure that the
+// given set of edges (the constraints) exist in the triangulation
+type ConstrainedIncrementalTriangulator interface {
+	IncrementalTriangulator
+	ConstrainedTriangulator
+}