# Filtering by vessel type (cargo and carrier vessels) (/docs/examples/generate-png/png-example6)



**Query parameters**

| Parameter     | Value                                | Description                         |
| ------------- | ------------------------------------ | ----------------------------------- |
| `interval`    | `DAY`                                | Daily temporal resolution           |
| `datasets[0]` | `public-global-presence:latest`      | AIS vessel presence dataset         |
| `filters[0]`  | `vessel_type in ("cargo","carrier")` | Filter to cargo and carrier vessels |
| `date-range`  | `2020-01-01,2020-01-31`              | Filter to January 2020              |

**Request**

<Tabs items="['cURL', 'JavaScript']">
  <Tab value="cURL">
    ```shell
    # Make sure to replace [TOKEN] with your API Access Token.
    curl --location --request POST 'https://gateway.api.globalfishingwatch.org/v3/4wings/generate-png?interval=DAY&datasets[0]=public-global-presence:latest&filters[0]=vessel_type%20in%20(%22cargo%22,%22carrier%22)&date-range=2020-01-01,2020-01-31' \
      -H "Authorization: Bearer [TOKEN]"
    ```
  </Tab>

  <Tab value="JavaScript">
    ```js
    // Make sure to replace [TOKEN] with your API Access Token.
    const res = await fetch(
      'https://gateway.api.globalfishingwatch.org/v3/4wings/generate-png?interval=DAY&datasets[0]=public-global-presence:latest&filters[0]=vessel_type%20in%20(%22cargo%22,%22carrier%22)&date-range=2020-01-01,2020-01-31',
      {
        method: 'POST',
        headers: { Authorization: 'Bearer [TOKEN]' },
      }
    )
    const data = await res.json()
    ```
  </Tab>
</Tabs>

**Response**

```json
{
  "colorRamp": {
    "stepsByZoom": {
      "0": [
        {
          "color": "rgba(34,139,34,25)",
          "value": 78
        },
        {
          "color": "rgba(34,139,34,102)",
          "value": 456
        },
        {
          "color": "rgba(34,139,34,255)",
          "value": 2134
        },
        {
          "color": "rgba(34,139,34,0)",
          "value": 0
        },
        {
          "color": "rgba(34,139,34,76)",
          "value": 234
        },
        {
          "color": "rgba(34,139,34,127)",
          "value": 789
        },
        {
          "color": "rgba(34,139,34,153)",
          "value": 1123
        },
        {
          "color": "rgba(34,139,34,178)",
          "value": 1567
        },
        {
          "color": "rgba(34,139,34,51)",
          "value": 134
        }
      ]
    }
  },
  "url": "https://gateway.api.globalfishingwatch.org/v3/4wings/tile/heatmap/{z}/{x}/{y}?format=PNG&interval=DAY&datasets[0]=public-global-presence:latest&filters[0]=vessel_type in (\"cargo\",\"carrier\")&date-range=2020-01-01,2020-01-31&style=eyJjb2xvciI6WzM0LDEzOSwzNF0sInJhbXAiOlswLDc4LDEzNCwyMzQsNDU2LDc4OSwxMTIzLDE1NjcsMjEzNF19"
}
```