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Is there any way to convert raster pixels to vector cells? I mean each pixel to a polygon.

I tried the SAGA tool 'Raster values to points' by choosing cells option instead of nodes option.

As a result, I got polygons but each one is not exactly on the pixel. When I tried with nodes option, I got points but they are not in the center of the pixel.

  • The anchor point of a pixel may be either at the centre of a pixel or at the top-left corner of a pixel. Did you see the latter behavior? – user30184 Apr 17 at 13:26
  • I updated the post and I added a picture of what I got. I don't understand what is the latter behavior. can you explain what you wanted to say please ??? – Namoat Apr 17 at 14:21
  • The latter alternative means that when pixel is compressed into a point the point is located at the top-left corner of the pixel. But what you have does not seem to suit with either alternatives. – user30184 Apr 17 at 14:28
  • ook, so do you have any other idea I can try to convert my pixels to cells(polygons)?? thanx – Namoat Apr 17 at 14:42
  • The right tool seems to be Vector creation - Raster pixels to polygons. Another tool, Raster pixels to points, is placing points into the centre of pixels. – user30184 Apr 17 at 18:14
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OpenJUMP PLUS seems to make perfect job with option Raster - Vectorialize - Create Polygon Grid from Raster. User must open the raster image as Sextante raster image. Unfortunately OpenJUMP tends to have problems with opening some kind of images.

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  • I just tried it. It is doing it perfectly . thanx – Namoat Apr 18 at 7:23
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You could try to classify the raster cells based on the range of values and then run a tool like raster to polygon.

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I use Global Mapper for this type of conversion.

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