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verma / plasio

Drag-n-drop In-browser LAS/LAZ point cloud viewer. http://plas.io
http://plas.io
MIT License
508 stars 131 forks source link

Elevation (z) offset and scaling. #42

Open lidar532 opened 10 years ago

lidar532 commented 10 years ago

It would be very nice to be able to set offset and scale for the z values.

verma commented 10 years ago

I get the scaling part, it'd be nice to scale out the Z axis to see more detail. How do you think the offset part would work?

lidar532 commented 10 years ago

Greetings!

Very nice project you have there.. Before scaling, would be nice to add an offset. I will frequently offset to translate from one vertical datum to another. For example, from wgs84 to sea level or navd88. Another reason would be if you could load two data sets at the same time and each was in a different vertical datum, you could offset one or the other of them to agree.

I would very much like to learn more about plasio. I'm interested to see if we could extend it to do manual point cloud editing, and some analysis.

Best Wayne

On Saturday, May 31, 2014, Uday Verma notifications@github.com wrote:

I get the scaling part, it'd be nice to scale out the Z axis to see more detail. How do you think the offset part would work?

— Reply to this email directly or view it on GitHub https://github.com/verma/plasio/issues/42#issuecomment-44759477.

“In theory, theory and practice are the same. In practice, they are not.” -Albert Einstein

443-783-3319 Pcell 603-994-8796 Fax

hobu commented 10 years ago

I will say that it is probably out of scope for plasio to be doing real vertical datum transformations. The software for doing that isn't really web-ready.

lidar532 commented 10 years ago

Hi Howard,

I agree that a real datum transform is out of scope; however, simply applying a fixed vertical offset is still very useful.

Best Wayne

On Saturday, May 31, 2014, Howard Butler notifications@github.com wrote:

I will say that it is probably out of scope for plasio to be doing real vertical datum transformations. The software for doing that isn't really web-ready.

— Reply to this email directly or view it on GitHub https://github.com/verma/plasio/issues/42#issuecomment-44766724.

“In theory, theory and practice are the same. In practice, they are not.” -Albert Einstein

443-783-3319 Pcell 603-994-8796 Fax

hobu commented 10 years ago

Out of scope for the short term, anyway. proj.4 in the browser with datum transformation might not be forever far away http://howardbutler.com/back-to-the-future-again.html