Add offset to existing point source ID

[Ben Hocker]

Hello,

I am looking for a way to increase the existing point source ID in a set of tiled las files by a fixed amount. For example if there were PSIDs in set of tiles ranging from 100-200, I would like to add a constant of 4000 so that the resulting PSIDs would be 4100-4200.

There is a similar command in lassplit (-point_source_offset) that offsets the PSID if it is updated in the splitting operation, but I need to retain part of the number in the original point source and would rather not split and retile the entire dataset.

I have looked for a way to do this in las2las, but so far have not been successful. Any ideas or suggestions would be appreciated! 

Thanks,

Ben

[Jochen Rapidlasso]

Hi Ben,

this is easy to do using las2las.

First you copy point_source to a register, then you set the offset to a second register, then you add both registers and write the result back to point_source.

The command looks like this:

las2las64 -i lake.laz -copy_point_source_into_register 1 -set_register 2 4000 -add_registers 1 2 3 -copy_register_into_point_source 3 -o result.laz

Cheers,

Jochen @rapidlasso

[Ben Hocker]

Excellent- thank you! 

Ben

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