geoinformatik.user wrote:
> As city we received altogether 200,000,000 points from a
> Laserscanning flight. With the help of the "DuplicateRemover" I
> could already filter the double values and have now 140,000,000!!!
> points. For a comprehensive analysis that is still too much and I
> want to analyse the neighbouring points to find Points with the same
> height Z.
>
> For Example:
>
> P1 P2 P3
> P4 P0 P5
> P6 P7 P8
>
> If point P3 has the same height (z) and/or definable altitude
> deviation of point P0 so I want to remove point P3. I have this
> situation e.g. on flat roofs.
>
> This point to point analyses already used in remote sensing.
One thing I would be tempted to try out is run a TINGenerator over it
and then only look at the TIN points output. Although it's not the same
as what you're describing, it could potentially match your needs (set
the tolerance very low).
The trouble here is that you have such an obscene amount of data, so
trying out different ideas is going to be time-consuming.
--
Hans van der Maarel
Red Geographics
Zevenbergsepoort 44b www.redgeographics.com
4791 AE Klundert [EMAIL PROTECTED]
The Netherlands phone: +31-168-401035
For insights into what's up at Safe Software and what's on the development
horizon, visit Safe's blog at spatial-etl.blogspot.com.
Safe Software has also made slides available that outline enhancements planned
for FME 2007. The slides are from the "Road Ahead" presentation given on Day 2
of the FME Worldwide Users Conference. To view these slides, visit
www.safe.com/2006uc.
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