nts on resampling in <cite>data2D.apply_transform</cite>.</p>
<p>rot90 determination of rotated axis can probably be extended to general case, but in the meanwhile
the implementation based on points offers an accurate interpolation (even if slower),
can be enabled setting flag <cite>usepoints</cite>.</p>
</dd></dl>

<dl class="py function">
<dt class="sig sig-object py" id="pySurf.data2D.save_data">
<span class="sig-prename descclassname"><span class="pre">pySurf.data2D.</span></span><span class="sig-name d