Polygon Volume Calculation Using DEM in QGIS

[@gamuchiraichitopo9364]

Hello...How did you determine the base level to use? Did you use the average elevation?

[@GEO2004]

It is just simply choosing an elevation value based on your preference

[@vanessacs9368]

Hello...but the water height won't keep 30 m as the ground level variation will increase it or decrease it at some points.

[@GEO2004]

Yeah, you can also model the varying water height in a raster data, negate it with surface topography, and perform the volume calculation based on pixel area, pixel counts and height differences.

[@andreiode8712]

Halo pak. Mw nanya. Runningnya complete tp volumenya 0 kira2 kesalahan ad d bagian mana ya? Konfigurasi base level height sdh d coba tp hasilnya msh 0.

[@GEO2004]

Msungkin datanya masih pake sistem koordinat geografis

[@andreiode8712]

Baik pak sy cb lg. Td udah pke utm polygonnya. Coordinat system jg udah d set k utm tp msh sama.

[@GEO2004]

Dem nya jg

[@andreiode8712]

Baik pak

[@andreiode8712]

Sdh bisa pak klo sy pke setelan base level height dgn konfigurasi approximate base level via average of polygon vertices. Tp klo pke konfigurasi use second DEM layer as a base. Msh gk bsa. Kira2 knp ya pak? 🙏

[@adityawahyu3327]

Terimakasih tutorialnya. Volumenya dalam ukuran apa ya?

[@GEO2004]

Sesuai map unit, kalau pake utm ya meter kubik

[@a5eythdse54]

It just shows 0 for me. Anyone can help?

[@GEO2004]

make sure all the data involved are using projected coordinate system

[@aloisiojbc9496]

Hi, nice video.

[@GEO2004]

Glad it could help

[@nathanielcaspian3923]

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[@cyrusgrayson7457]

@Nathaniel Caspian Instablaster :)

[@nathanielcaspian3923]

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[@nathanielcaspian3923]

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