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I have two datasets - a large polygon that contains all wards boundaries, and a gps coordinates of places visited, that fall within a city's boundaries as well as slightly outside. I'd like to save a subset of the ward polygon in such a way that not only all my gps coordinates would fall into this polygon, but that the polygon is "square/rectangular" shape.

Essentially, I would like to do the following: a) Zoom to layer the gps coordinates, to identify the area I would like to save, and b) Save the large polygon but only what is "visible" on the screen (see below)

Splitting features wouldn't work as I would have to zoom out to draw the line without actually knowing whether I would split the feature too "low" or too "high" without multiple trial and error.

enter image description here

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  • What tool are you planning on using?
    – Ian Turton
    Commented Apr 30 at 18:37
  • Hi Ian, I'm using QGIS version 2.18.23
    – Nick
    Commented Apr 30 at 19:13
  • well I would move to the century of the fruit bat and version 3.x
    – Ian Turton
    Commented May 1 at 9:15

1 Answer 1

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You can use the geoprocessing tool Extract/Clip by Extent. Zoom how you wish, then click the "set to current map canvas extent" button. Make sure to opt to clip the features.

enter image description here

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    PS: QGIS 2.18 is an archaeological artifact, I don't know if this tool existed in this era.
    – JGH
    Commented Apr 30 at 19:32
  • Thanks JGH - I'm currently downloading an updated version, I also noticed that the tool doesn't exist in the version I have.
    – Nick
    Commented Apr 30 at 20:18

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