# BIASDISTCARTESIAN

The `BIASDISTCARTESIAN` field specifier allows you to boost the score of any document according to its distance from a specified point using Cartesian coordinates (X/Y).

TIP: If your document location fields contain regions (in Well-known text POLYGON format), the `BIASDISTCARTESIAN` operator calculates distances from the geometric center of the region.

## Format

    FieldText=BIASDISTCARTESIAN{coordX,coordY,range,maxboost}:POSITION

`coordX` | The specified x coordinate.
`coordY` | The specified y coordinate.
`range` | The distance in kilometers from the specified coordinates.
`maxboost` | The maximum percentage to boost the result.
`POSITION` | The document field or fields that contain the location value. You can use one of the following options to specify location fields: a single field. This field must contain a Well-known text format POINT or POLYGON definition (for example, `POINT (x y)`). This field must be a unified GeospatialType field. two fields, in the format `X:Y`, where `X` is the field that contains the x coordinate, and `Y` is the field that contains the y coordinate. You must specify the fields in the order `x:y`. The fields must be NumericType or GeospatialType.

## Example

    FieldText=BIASDISTCARTESIAN{10,11,5,7}:X:Y

    FieldText=BIASDISTCARTESIAN{10,11,5,7}:POSITION

In these examples, all documents whose (X/Y) position is within a distance of 5 units of the point (`10,11`) are given a relevance boost. The maximum boost of `7` percent is given to documents at the given point. The boost decreases linearly down to 0 boost at 5 units.

In the first example, the location data is stored in two document fields, `X` and `Y`. In the second example, the location data is stored in a single `POSITION` field.

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