.. _auto_curves_rdp_downsampling:

*CURVES RDP DOWNSAMPLING*
=========================

Reduces the number of points in one or more curves using the Ramer–Douglas–Peucker (RDP) algorithm. Use this worker to downsample dense time-history or XY curves while preserving their overall shape, before plotting, further processing, or storage.

When to use
-----------

Classification: **process**.

Tagged: ``curve-simplification``, ``downsampling``, ``point-reduction``, ``ramer-douglas-peucker``, ``rdp``.

Inputs
------

.. list-table::
   :header-rows: 1
   :widths: 20 20 20 20 20 20

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Curve 1
     - curves
     - vector
     - —
     - 
     - One or more XY curves to be downsampled; accepts multiple curve objects — leave empty if curves are supplied by an upstream worker.
   * - Epsilon
     - epsilon
     - scalar
     - 1
     - 
     - Maximum allowable perpendicular distance (in curve units) between the original and simplified curve; default is 1 — increase to remove more points, decrease to preserve more detail.

Outputs
-------

.. list-table::
   :header-rows: 1
   :widths: 20 20 20 20

   * - Label
     - ID
     - Type
     - Description
   * - curves_rdp_downsampling_output_1
     - curves_rdp_downsampling_output_1
     - vector
     - Downsampled version of the input curve(s), retaining only the points needed to approximate the original shape within the specified epsilon tolerance.

Disciplines
-----------

- data.curve.transform
- data.signal_processing

Runnable example
----------------

A runnable example is registered for this worker. Open the example workflow on the d3VIEW canvas: `/api/workflow/example?id=curves_rdp_downsampling <https://www.d3view.com/api/workflow/example?id=curves_rdp_downsampling>`_

.. raw:: html

   <hr style="margin-top:2em">
   <p style="font-size:11px;color:#888">
   Auto-generated from <code>transformation</code> schema. Worker id: <code>curves_rdp_downsampling</code>. Schema hash: <code>d249d6bf36c4</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>