# TopN by coordinates (Double)

### Description
Selects the top N objects based on their coordinates (double attributes)

### Input
- `SOURCE [OBJ]`: the list of objects to filter

### Output
- `RESULT [OBJ]`: the selected objects

### Parameters
- `Property for the x axis`: The x-axis of the reference point
- `Property for the y axis`: The y-axis of the reference point
- `N`: the maximum number of desired objects
- `Method`:
  - `Closest to reference point`
    - `Reference point (x)
    - `Reference point (y)
  - `Random`
  - `Random with maximum spread`
    - `No-overlap radius`: no two results are allowed to be closer than this (in Km)
Output scores can be [aggregated](docs://score_aggregation) and/or [normalised](docs://score_normalisation).