# Conversion Options and Available Formats

By default, direct downloads are COPC point clouds in LAZ format. The default horizontal CRS is an MTM CSRS zone (based on region), and the default vertical datum is CGVD2013.

You can choose different projection options. For example, select a non-CSRS horizontal CRS or a different vertical datum (e.g., CGVD28). When a transformation is required, the tool projects on the fly.

## Point Cloud Format (LAZ/LAS)

* LAZ (compressed) acts as a preference. If no transformation is required, the native COPC (.laz) is delivered.
* LAS (uncompressed) forces a non-compressed output.
* Any reprojection (horizontal and/or vertical) results in a LAS output regardless of the LAZ preference.

## Horizontal and Vertical CRS

* Horizontal and vertical CRS are selected independently.
* The available target CRS lists are limited to the intersection of allowed transformations for the current selection.
* Defaults reflect the source CRS of the selected files; changing them alters the output.


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