> 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/jpn/apidokyumento/geopard-apirikuesuto/48-kueri-mappukaraguriddodtawo.md).

# 48. クエリ: 地形マップからグリッドデータを取得

「TopographyMap」に関連するラスタ データセットからソース データを取得するクエリとして `GEOJSON`  ポイント付きまたは `GEOTIFF`。properties 属性には、ポイントごとのすべての地形派生物（DEM、傾斜、起伏部分、粗さ、方位、ハイルシェードなど）が含まれます。 

#### 1. エクスポートするファイルをリクエストする

{% hint style="danger" %}
推奨：次を使用して単一のデータセットのみを取得すること `sourceDataUrl` リクエストごとに。 
{% endhint %}

`NoBuffer`, `PlusOnePixel`, `PlusTwoPixels`, `MinusOnePixel`、および `MinusTwoPixels` として利用可能です `バッファ`.

`GEOJSON` と `GEOTIFF` フォーマットとして利用可能です。 

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

```graphql
query GetGriddedDataFromTopographyMap {
  getFarms (farmUuids: ["<placeholder_of_farm_uuid>"]){
    uuid
    fields (fieldUuids: ["<placeholder_of_field_uuid>"]) {
      uuid
      topographyMaps(topographyMapUuids: ["<placeholder_of_topography_uuid>"]) {
        uuid
        sourceDataUrl(format: GEOJSON buffer: PlusTwoPixels)
      }
    }
  }
}
```

{% endcode %}

#### 2. 生成されたファイルをダウンロードする

ファイルの準備が成功した後、次を使用してダウンロードできます `curl` または同様の方法。

{% hint style="danger" %}
`sourceDataUrl` リンクは以下の期間のみアクセス可能です **60 秒。**
{% endhint %}

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

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

{% endcode %}


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