# filters.returns¶

The returns filter takes a single PointView as its input and creates a PointView for each of the user-specified groups defined below.

first is defined as those points whose ReturnNumber is 1 when the NumberOfReturns is greater than 1.

intermediate is defined as those points whose ReturnNumber is greater than 1 and less than NumberOfReturns when NumberOfReturns is greater than 2.

last is defined as those points whose ReturnNumber is equal to NumberOfReturns when NumberOfReturns is greater than 1.

only is defined as those points whose NumberOfReturns is 1.

Default Embedded Stage

This stage is enabled by default

## Example¶

This example creates separate output files for the last and only returns.

{
"pipeline":[
"input.las",
{
"type":"filters.returns",
"groups":"last,only"
},
"output_#.las"
]
}


## Options¶

groups
Comma-separated list of return number groupings (‘first’, ‘last’, ‘intermediate’, or ‘only’)