I have such points

pts=Uncompress[FromCharacterCode[
  Flatten[ImageData[Import["https://i.sstatic.net/hkAK8.png"],"Byte"]]]]

{{79.044,235.992},{94.9421,235.945},{111.087,235.922},...,,{511.07,12.0754},{527.079,11.9187},{590.997,12.0931}}

I can show it like following

ListPlot[pts]

How to know these point have 15 rows and 32 columns?