ColumnRangeFilter

The ColumnRangeFilter operator allows filtering FeatureCollections. Users can define one or more data ranges for a column in the data table that is then filtered. The filter can be used for numerical as well as textual columns. Each range is inclusive, i.e., [start, end] includes as well the start as the end.

For instance, you can filter a collection to only include column values that are either in the range 0-10 or 20-30. Moreover, you can specify the range a to k to dismiss all column values that start with larger letters in the alphabet.

Parameters

Parameter	Type	Description	Example Value
`column`	string	a column name of the `FeatureCollection`	"precipitation"
`ranges`	List of either string or number ranges	one or more ranges of either strings or numbers; each range works as an or for the filter	[[42,43]]
`keepNulls`	boolean	should null values be kept or discarded?	true

Inputs

The ColumnRangeFilter operator expects exactly one vector input.

Parameter	Type
`vector`	`SingleVectorSource`

Errors

If the value in the column parameter is not a column of the feature collection, an error is thrown.

Example JSON

{
  "type": "ColumnRangeFilter",
  "params": {
    "column": "population",
    "ranges": [[1000, 10000]],
    "keepNulls": false
  },
  "sources": {
    "vector": {
      "type": "OgrSource",
      "params": {
        "data": "places",
        "attributeProjection": ["name", "population"]
      }
    }
  }
}

{
  "type": "ColumnRangeFilter",
  "params": {
    "column": "name",
    "ranges": [
      ["a", "k"],
      ["v", "z"]
    ],
    "keepNulls": false
  },
  "sources": {
    "vector": {
      "type": "OgrSource",
      "params": {
        "data": "places",
        "attributeProjection": ["name", "population"]
      }
    }
  }
}