Calculate percentage of land use per subcatchment in QGIS 3

This video shows how to derive the percentage of land use/land cover within the polygons of a layer with subcatchments. The example uses open data from CORINE 2018. QGIS 3 functions for vector analysis are used such as dissolve and intersect.

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[lesliethilow]

You have a great 👍 teaching style Hans! Thanks so much for taking us through these processes. It’s nice to hear you explain things so clearly and succinctly.

[archidmdemdoum]

Thanks a lot, no words can describe how thankful I am right now, keep it up bro.

[fredsmithers]

Thanks so much for this great tutorial Hans you legend!!! This has helped me with my dissertation heaps (I'm currently studying land use in train station catchments in Auckland, NZ). If i ever make it back to NL, i'm coming to buy you a beer!!

[AbdullahSalimalig]

Your way of explaining is really amazing. Keep doing the good work.

[KEcAzZ]

Brilliant! Just what I was looking for. Thanks!

[OliiwiaB]

Thank you for this tutorial!! It saved me

[ewighol]

That's awesome, thank you so much !
It works perfectly, and the video is so clear..!

[sanderamamama]

Thanks a ton, precisely what I needed!

[evitaooo]

Thank you very much! Very well explained!

[laurasaggiomo]

Dear Dr van der Kwast,
thank you for this extremely useful video. Unfortunately, following your steps, during the dissolving process (and I am quite sure it will happen also during the intersecting one) I got the warning for some non-valid geometries. Would you be so kind as to tell me if it is still okay, or suggesting me some solutions (maybe some tutorial of yours, or some manual)?

Thank you
Laura

[OrGaAn]

Thank you loads, this has been really really helpful :)

[gemmam]

Fantastic video! How does one colour each catchment according to percentage of a certain land use type?

[martinallart]

Thank you very much Hans for your video, very useful.
Quick question, is that possible to first deal with the intersection and then with the dissolved.
I have geometry bugs and I thought it might help.

[khawlaalbedwawi]

can you help and record a video of how to calculate the areas of land uses (agriculture/roads/buildings) effected by different sea level rise scenarios? please i need urgently

[canha]

Great Video. Very clearly explained.
Can this method be applied to calculate the area percentage in raster layers?
I'm interested in calculating the proportion of NDVI classes in certain cultivation plots, using data from sentinel-2.
Thanks!

[deemahsukkar]

Hello, thank you very much for this video, it helped me a lot in my thesis. however, in the dissolve step, the area do not sum up after aggregating the data in terms of level value. i really would appreciate your help on this. thanks in advance :)

[amanjain]

Thank you. Quick question everyone reading this. If my catchment is small ( 10 ha or less), then using 100m res data isnt going to benefit me. If I classify sentinel-2 imagery ( k-means), how do I validate that? Or should I use any other approach?

[MovIEsLveR]

Great video! I successfully made the table you show in the end. But some polygons have multiple percentages per land use. Is there a way to let QGIS combine those results from the same class? I could do it myself in excel but would be quicker if QGIS could do this.

[gerryroberts]

Great job Professor. What about soil data and land uses for other countries outside Europe? Let's say Oman?

[anjanaadevi]

Thanks for this! I'm using this video to calculate percentage of land usage falling within 10-minute-buffers of individual MRT stations. Since the catchment areas (buffers of adjacent MRT stations) are overlapping, it's tricky. Do you know how I can work around that?