> 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/nl/api-documentatie/overzicht-van-geopard-api-verzoeken/50.-query-gerasterde-data-uit-vectoranalysismap-ophalen.md).

# 50. Query: gerasterde data uit "VectorAnalysisMap" ophalen

Query om rastergegevens op te halen uit de "VectorAnalysisMap" als `GEOJSON`  met punten of `GEOTIFF`. Het properties-attribuut bevat de originele gegevens (zoals indexwaarde) per punt.

#### 1. Vraag een bestand aan om te exporteren

{% hint style="danger" %}
Aanbevolen om slechts één dataset op te halen met `sourceDataUrl` per verzoek. 
{% endhint %}

`NoBuffer`, `PlusOnePixel`, `PlusTwoPixels`, `MinusOnePixel`, en `MinusTwoPixels` zijn beschikbaar als een `buffer`.

`GEOJSON` en `GEOTIFF` zijn beschikbaar als een formaat. 

{% code overflow="wrap" lineNumbers="true" %}

```graphql
query GetGriddedDataFromVectorAnalysisMap {
  getFarms(farmUuids: ["<placeholder_of_farm_uuid>"]) {
    uuid
    farmOwnership
    fields(fieldUuids: ["<placeholder_of_field_uuid>"]){
      uuid
      vectorAnalysisMaps(vectorAnalysisMapUuids: ["<placeholder_of_zonesmap_uuid>"]) {
        uuid
        sourceDataUrl(format: GEOJSON buffer: PlusTwoPixels)
      }
    }
  }
}
```

{% endcode %}

#### 2. Download het gegenereerde bestand

Na succesvolle voorbereiding van het bestand kan het worden gedownload met `curl` of een vergelijkbare methode.

{% hint style="danger" %}
`sourceDataUrl` link is alleen toegankelijk voor **60 sec.**
{% endhint %}

{% code overflow="wrap" lineNumbers="true" %}

```bash
curl '<sourceDataUrl>' --compressed >> '<local_filepath>'
```

{% endcode %}


---

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