lazwrite

lazwrite(FileName::AbstractString, xyz; grd_hdr=[], scaleX=nothing, scaleY=nothing, scaleZ=nothing, offX=nothing, offY=nothing, offZ=nothing)

or

lazwrite(FileName::AbstractString, G::GMTgrid; scaleX=nothing, scaleY=nothing, scaleZ=nothing, offX=nothing, offY=nothing, offZ=nothing)

Write XYZ data to a LIDAR laz (laszip compressed) or las format file. The second form is used to write a GMTgrid to a laz file. This is a rather more compressed format that waht is achieved with netCDF, but slightly lossy. Use lazread or gmtread to read the laz file back into a GMTgrid.

Args

• FileName: The name of the file to write to. It must end with .laz

• xyz: A Mx3 array with the point coordinates

• G: A GMTgrid object.

Kwargs

• scaleX, scaleY: Scale factor for the X,Y coordinates used in the laz compression. Default is 1e-7 and 1e-3 for geographical and cartesian coordinates, respectively.

• scaleZ: Scale factor for the Z coordinate used in the laz compression. Default is 1e-2.

• offX, offY, offZ: Offsets for the X,Y,Z coordinates used in the laz compression. Default, computes these values as (floor((hdr.min_x + hdr.max_x) / scaleX / 2e7)) * 1e7 * scaleX.

Example

To write the x,y,z data to file "lixo.laz" do:

lazwrite("lixo.laz", xyz)

See Also

lazread, gmtread