# Manipulate contours

The format of contour data returned by {py:meth}`~.ContourGenerator.lines`,
{py:meth}`~.ContourGenerator.filled`, {py:meth}`~.ContourGenerator.multi_lines` and
{py:meth}`~.ContourGenerator.multi_filled` is controlled by the `line_type`, `fill_type` and
chunking keyword arguments passed to {py:func}`~.contour_generator`. Usually this is fully
within your control but there may be occasions when it is not, such as when your contour data is
obtained via a third-party library that limits some of the available options. ContourPy includes
functions to manipulate contour data that has been returned to you in such situations.

```{toctree}
:maxdepth: 1

convert
dechunk
```