## Extract by Time ##

### Summary ###

Extract by GPS time tool can extract all the point cloud data within the user-defined GPS time range, and save them in a file.

### Usage ###

Click *Data Management > Extract > Extract by Time*

<div align=center>
<img src="../../../ScreenShot/en/DataManagement/Extract/ExtractbyTime.png" alt="Lidar360 ExtractbyTime" width="480" style='margin-left:4%'/>
</div>

### Settings ###

- **File List**: Select the file to be processed from the drop-down list.
- **Min Time**: Displays the minimum GPS time value in the point cloud file selected by the user. This value does not require user settings.
- **Max Time**: Displays the maximum GPS time value in the point cloud file selected by the user. This value does not require user settings.
- **Start Time (default value is "min Time")**: Input the minimum GPS time value of the point cloud data to be extracted.
- **End Time (default value is "max Time")**: Input the maximum GPS time value of the point cloud data to be extracted. This value must be larger than the start time.
- **<img src="../../../Icon/Common/Up.svg" alt="Lidar360 DataAdd" height="20" style="vertical-align:middle"/>**: If you want to extract the point cloud at a specified interval, enter the interval value in the text box, and then click this button, the values of the start time and end time will increase at the set interval.
- **<img src="../../../Icon/Common/Add.svg" alt="Lidar360 DataAdd" height="20" style="vertical-align:middle"/>**:  Add the input time range to the range list. All point cloud data in the time range will be extracted into one file.
- **<img src="../../../Icon/File/GenericOpen.svg" alt="Lidar360 DataAdd" height="20" style="vertical-align:middle"/>**: Users can click this button to load external GPS range file. The time range in the file needs to be between the **min Time** and the **max Time**. The file format can be referred to the appendix for information in the [GPS time extract file format](../../../Appendix/GPSTimeExtractFileFormat.md).
- **<img src="../../../Icon/Common/Delete.svg" alt="Lidar360 DataAdd" height="20" style="vertical-align:middle"/>**: Users select a row in the time range list and click this button to remove the row from the list.
- **Output Path**: Path of the output folder. After the function being executed, the extracted new file will be generated.
