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How to calculate the polyline area in QGIS?I have the width and length and I want to calculate the area of the river using that information so I can redraw my river using the area size calculated. However, idk ways to calculate the area using that information in QGIS. attribute table my project

Nurul Nabilah Mahmud
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    I'd buffer https://docs.qgis.org/3.28/en/docs/gentle_gis_introduction/vector_spatial_analysis_buffers.html by the width then calculate the area of that polygon https://gis.stackexchange.com/questions/23355/calculating-polygon-areas-in-shapefile-using-qgis, not perfect but probably close enough. – Michael Stimson Jun 08 '23 at 00:35
  • oh means the buffer can represent the size of the poly line? – Nurul Nabilah Mahmud Jun 08 '23 at 00:39
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    Yes, the buffer will be the area provided you buffer by half the width or you will exagerate the area and your data is in a suitable projected coordinate system. – Michael Stimson Jun 08 '23 at 00:48

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