Regression: Probably double transform on clipped groups after #195

[napakalas]

This render appears after #195 fix.

[dbrnz]

What exactly is the issue? The pink background? Heart left ventricle in the wrong place? Some paths going off screen?

Are you able to provide a minimal SVG showing these issues in the generated map? Say starting with the test map as a base and removing features? Thanks.

[napakalas]

The issue is related to
https://github.com/AnatomicMaps/flatmap-maker/blob/a86d8dac227d00eead84345ab46c520261369235/mapmaker/sources/svg/init.py#L311-L317
As an example, consider kblad 9 on male-human-flatmap (the test-flatmap cannot be used because it has no clip-path), where the terminal should be the urethra (see Figure 1). The current behaviour for kblad 9 is as follows:

• The positions of the spines and nerves are correct.
• The urethra position is detected much higher than expected, causing the path line to extend upward (see Figure 2).
• However, the urethra highlighting when hovering over kblad 9 is correct.

Figure 1. Correct render:

Figure 2. Render with the the recent update

Here’s the essential structure of the urethra SVG, keeping only the parts relevant to understanding the issue (clip paths + geometry):

<g transform="matrix(1, 0, 0, 1, -120.0686, 1.2846)">
  <title>.id(urinary_14-1)</title>

  <!-- Clipping region 1-->
  <clipPath id="clip1">
    <rect x="1105.612" y="2917.146" width="9" height="307.933"/>
  </clipPath>

  <!-- Clipping region 2-->
  <clipPath id="clip2">
    <rect x="1100.612" y="2912.146" width="19" height="317.933"/>
  </clipPath>

  <!-- Rendered content (probably clipped multiple times) -->
  <g clip-path="url(#clip1)">
    <g clip-path="url(#clip2)">
      <image
        width="63"
        height="690"
        transform="matrix(0.332045, 0, 0, 0.473718, 1099.478, 2906.247)"
        xlink:href="data:image/jpeg"9"
    height="307.933"
    fill="none"
    stroke="#807969"
    stroke-width="0.5"/>
</g>