> 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/dnk/korte-gis-tips/qgis-udbyttedatamanipulation.md).

# QGIS: Udbyttedatamanipulation

Forbered og rens udbyttedata i QGIS, før du importerer eller analyserer dem i GeoPard.

OVERSIGT<br>

Manual med trin-for-trin-beskrivelse til at løse følgende problemer med data fra udbyttemonitoren:

1. Manglende projektionfil (.prj) i shapefilen
2. Anvend konverteringsregler for hver attribut i shapefilen (baseret på kb/ha til bu/ac-eksempel)

<br>

Programmet, der skal bruges, er QGIS ([LINK](https://qgis.org/en/site/forusers/download.html)).

Download og installation er obligatorisk.

### &#x20;MANGLENDE PROJEKTIONSFIL

1. Åbn shapefilen med udbyttedata. Flyt filen ind i QGIS-vinduet.
2. Shapefilen bliver tilgængelig til videre bearbejdning i Lag-panelet.

![](https://lh5.googleusercontent.com/c4jakjBa8tCN9ZSxVnh6W6DDE24qYFGewLdjTwPi7i0yg7-Zp6JmeXE4yiq3JqhaIFhFE8mHxyKzR9avluJzJpsaUxXSxzCI_RSV0GjJyPoAp7sNj_UdMyEBRNs38siTdV9Ue2VY75Prqu57rKtj)

3. Start gemmeprocessen
4. 1. Højreklik på shapefilen
   2. Vælg Eksporter -> Gem objekter som ...

![](https://lh5.googleusercontent.com/4p2FP0E4GEnN0KTcCgRvXro6oam-GCTGgc_s4yjkuujdXxbnjyPT5a1Z1Dr_o9_W3rw2AhtUMSQ7-RXHx3Xeca2vtMjCGTRIS_BTifbKCXhthfrWy9z5Ti3Ve6kCPFnatunJJ_jGy8gBWOa85CZg)

<br>

4. Vælg
5. 1. Format -> ESRI Shapefile,
   2. Filnavn -> klik … og vælg den ønskede mappe og filnavn,
   3. CRS -> EPSG:4326
   4. Kodning -> UTF8
   5. Tilføj gemt fil til kort (valgfrit hvis du vil se den direkte i QGIS)
   6. Geometritype -> Punkt

![](https://lh4.googleusercontent.com/GUoerdddlqqyW1xQAGXkAc8txhiCnTrhL6B6HeM3gUsWgV9NatvqrjWtEQAHGsGzkS27fnsOM-QFuYuiafCUYdOOoy9AdKXJhp213uceDJuOxzfp01rMQnt4ruYoHjqhkE0iMl977pE_xfcwzaj9)

5. Klik Ok
6. En ekstra shapefile med de samme udbyttedata oprettes. Projektionsfilen (.prj) blev tilføjet.

\ <br>

### BU/AC-KONVERTERING

<br>

1. Højreklik på shapefilen og vælg Åbn attributtabel

![](https://lh6.googleusercontent.com/NdfMyO0879Gfs3hNy65xG-dS4Ny3LtNn89F6yhVTwHZ4NqbjM1YMaJ7EWje5ySzgJkcGXexg6BE0mQorWsTej_90QXtLN7uHUds-eLmSN2wJltszg4YWk63Cm0kpiJUcAvFi3K6rily96QzjCNRW)

2. Klik Åbn feltberegner

![](https://lh4.googleusercontent.com/CfXuEr0pNJFpTvu-Z4-p2Dhu91MNhhTvzIsf_S0xft59X7MQfqnDlwQSQmgnAa6InPROgBWY-yPyviS31PzhMhlySfuC4AWpYrchxUr_XS9P29MxHg8m1_cKuLm5DzBvkboeNuCynf1gTaJQX3ox)

3. Opret et nyt felt
4. 1. Markér Opret et nyt felt
   2. Angiv Output field name -> DryYieldBu
   3. Vælg Output field type -> Decimaltal (real)
   4. Skift Precision -> 4
   5. Indsæt regel for at konvertere kg/ha til bu/ac -> "Dry\_Yield" \* 0.0149

![](https://lh6.googleusercontent.com/nE9n9fiD0geaw5ebrp1R1KtJgqnCQQz8AC9ulpvQvvtgQzxZed6n9Cs7zRBlGH0gK-fSDTu--LvBXw4_i7hWmw3k9dVzLdU24j9JVuCcdol9AGx3Byi38CRsNFWSRI3MN_I6fd71NGjcABMn7ENs)

4. Klik Ok
5. Det ekstra attribut DryYieldBu er dukket op i tabellen

![](https://lh6.googleusercontent.com/S2PYA5-ZAkomBfAOe4g6AnTmu39STpYt3Bea4duzaNSIwODXOaY8m0h7hkj2SsnjlrDLCwuU94Bs9CNl_7SsZfDgBERfZ1RYSUvsrJBo-Wd8Tj4k_R6PkoELYfk2_XJfu3hcx0C43z0JTQuUbsYB)

6. Gem ændringerne
7. 1. Højreklik på den relevante shapefile
   2. Vælg Slå redigering til/fra

\
\
\ <br>

![](https://lh4.googleusercontent.com/Clwm4XcTG0N49JqJLZV9zJWpg0LPKeevU05w0d30F-PobS23vlVXcLp8MMPZif9rZs7ojl5SdymHz_FHQDdS1Pyz2y2dfhoL49au6C6y5A3huz_yFAcqvDcpKgB5XRh96oS97JBnxKSXWttWibVV)

7. Bekræft, at ændringerne skal gemmes

![](https://lh5.googleusercontent.com/RYEl5WkYMsX2aNA-zO6hUEXO6OGnFD2JO0XfNmJ6tqirz5Bw2udMa2ZUGTA8ZuZZb__mv5AtvmC-fZouyMUwUTzNdIn8ahzJhFXwW2M9PPgHDfuc8Qqq6UpC-MkU-xgPv0yCzoOoZjy-kpPn7xBP)

Den relevante shapefile er ikke længere markeret med en blyant. Dataene i shapefilen blev opdateret.


---

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