> For the complete documentation index, see [llms.txt](https://docs.geopard.tech/geopard-tutorials/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.geopard.tech/geopard-tutorials/nor/korte-gis-tips/qgis-beregn-ndvi-for-drone-geotiff-filen.md).

# QGIS: Beregn NDVI for drone-GeoTIFF-filen

Noen ganger må du beregne gjennomsnittlig NDVI for en polygon inne i skiftet. Du kan gjøre følgende i et QGIS-program.<br>

<figure><img src="https://lh4.googleusercontent.com/fkankewAK-NkgRxklkXsY_17vIFeDwTjuCNNPvHPX2yzdAQsAx3sWvbQpSnnB8AxG85zYHEyNreHFAUnuD1SzaOZ5gkw-6JZ4X1xAkLs_f7ZNqGogyXOfABMxIBg4LQiO1yg_-OX4J5FtUoQlmPtAw" alt=""><figcaption></figcaption></figure>

#### 1 - Vis den opprinnelige Drone NDVI-geotiff-fila

<figure><img src="https://lh6.googleusercontent.com/TnFIzVA_U7L1Z4oMmnOAKZHZQBQ7-1-IqrPAidFzzh7SSF-9KWLAf5xDdwpifj3Ff847fN-wS2tU6jzWcm4qUa4dNkbX287BNpakmOHDqGvsrBPiCkICYpxN_qJiJ2EBkKcJjauq02KAAAyKLB7Gbg" alt=""><figcaption></figcaption></figure>

#### 2 - Opprett et nytt lag

<figure><img src="https://lh6.googleusercontent.com/XjSDzTuLAggVtP0SizpQMRjG6jBsUQVS2MKFxbauRFUD_YOq2KsbXo6Ov3sTiO2r158q9qyXGQyiSiC3IbMrx-SboOrVfEs5bvgYoVIXcqyIQfffKeoKdCDRhQDkx65xaPTpKRrBhuTJDXPJlpQfZA" alt=""><figcaption></figcaption></figure>

#### 3 - Sett opp lagnavn og geometritype, og trykk OK

<figure><img src="https://lh5.googleusercontent.com/H1cGGtrsYwaHw9RCYIU-AJ-vGm7c8Ct5tC5HVnVx96Ev-nYa3gleJ6joKrX-6zfIKMF50eBmI2MPFJ4FEmam9gvjKFq-ovVxhw7FhecUnH6Xf1OQ2MA87t-8H_km6cpYEySZqQW_DZV79YLClPDPeg" alt=""><figcaption></figcaption></figure>

#### 4 - Velg laget i Lag-panelet

1. Velg «Slå redigering av/på» (1)
2. Velg «Legg til polygonobjekt» (2)

#### 5 - Tegn en polygon. For å avslutte tegningen, trykk høyre museknapp og sett «id» i popup-vinduet.

Avslutt laget ved å trykke «Slå redigering av/på» igjen og trykk «Lagre».

<figure><img src="https://lh3.googleusercontent.com/3qiSZYB3e8c_froqsv59x8tU9mMKIh3cvC6Tlv9xyZDZQc6d5AGZXylBVGBvnypyDVXJvbUsqNVe5p8aF8mS0VnSCPPTwqsIvAVYmnZYAlGgBnVu5od_5C1oU3IwDwpUpcJhWpbDrMzI46UgaeLtTg" alt=""><figcaption></figcaption></figure>

#### 6 - Velg Zonal statistics i panelet «Processing toolbox».

<figure><img src="https://lh3.googleusercontent.com/qdPIGWoz8W2id9mXwjo-7AnbX8RWSpMnEdhFtIzR4fq07Po3Jg2Wmn0-4Ucgihk_04H2VJsQraYPSE8f6MHB0cjtMD2VAsMe8ILf6vu-gtCXFor7pGVg-1-vus8OXx2MyY2Ogb4LVMxcpB7Hkp5sHw" alt=""><figcaption></figcaption></figure>

#### 7 - Velg rasterlag (1),

Velg polygonlag (2),

Trykk «Kjør» (3).

<figure><img src="https://lh3.googleusercontent.com/htEYAd45WO6Rcw8rHMQ4W7rO4CdjsyxiHP_7Wb2gUan1Dw_szsi43ePRS6x8lHhAA8JeklNUfPEm3Xh6nXnoDJaiXq3eMGwqSOC2Yb-qvnUhOIInsMhCe_ImYHEv7MS60ZkXYoaXkJiKBIOTUskbTQ" alt=""><figcaption></figcaption></figure>

#### 8 - Velg laget i Lag-panelet og trykk høyre museknapp; i hurtigmenyen velger du Åpne attributtabell.

<figure><img src="https://lh3.googleusercontent.com/Oc1SLXwTAYBzZUrFq3TOAnF2p9UROQ28Cv6wv3XXhLkS5LGYRNoZ-JD_HIjDt-9FEiAzQLXjehiIyjZielJtB6-F0ohTMz3gTbsoZ02vanuuv37voF72i1h3p8YQBuhgfpt6hCcTguhM3-AujNSV_A" alt=""><figcaption></figcaption></figure>

#### 9 - De beregnede statistikkene vil vises i tabellen.<br>


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation by asking a question.

Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:

```
GET https://docs.geopard.tech/geopard-tutorials/nor/korte-gis-tips/qgis-beregn-ndvi-for-drone-geotiff-filen.md?ask=<question>&goal=<user_goal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.