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As title, I have one line shapefile with many segments:

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How to use QGIS to quickly edit this line shapefile and output a new file looks like the original one, but with only one segment (its attribute table only has one row)?

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Create a new field of integer type and give one value for all rows in this field. Then use dissolve tool from Vector -> Geoprocessing tools -> Dissolve, if you are using QGIS 2.14.7, and select the NewField as a base to dissolve your polygons. If you are using QGIS 2.16.3, then go to Processing toolbox -> QGIS geoalgorithms -> Vector geometry tools -> Dissolve.

Or you can use Singlepart to multipatrs tool from Vector -> geometry tools and do the same process of selecting the new field with one value for all rows.

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  • Thank you, it worked, but the manual of 'Dissolve' make me believe that the function only handle polygons.
    – Heinz
    Commented Oct 20, 2016 at 4:10
  • Glad it worked.
    – ahmadhanb
    Commented Oct 20, 2016 at 4:17

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