Following have two problems:

  1. I am now have 4 point in a shapefile and I want to set the point's coordinate for boundary of a polygon

    The points are xmin, xmax, ymin, ymax that can just be a rectangular polygon.

  2. I want to make it to create a shapefile to make difference with another polygon shapefile

above problems i want to do it with python script

any ideas?

I use QGIS 1.8.0 and python 2.7.3

  • 2
    Try the following: 1. use convex hull on the points --> should give you the polygon, 2. use difference. Is that the result you are looking for? Do you need a python script or would a Sextante geoprocessing model help too? – underdark May 28 '13 at 8:48
  • In fact, I need python method to do this two, i can do it with plugin qgis provide,but I want to do it with python – blueman010112 May 28 '13 at 9:05
  • 1
    Check this post – dmci May 28 '13 at 12:43

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