Author Archives: Suppenkasper_in

VPPS-SS14-W10-2-Suppenkasper_in

Bäume identifizieren

Frage: Wie unterscheidet man zwischen Häusern und Bäumen?
- Corine Datensatz
- selbst Polygone schneiden

Wald klassifizieren:

Analyse der relativen Baumhöhe
- Tool: Minus (Lidar Id 13 minus Lidar Id 02)
- Invertieren (*-1)
- Flow direction, flow accumulation

Ermittlung eines Schwellenwertes
(Wo ist ein Break von Single- zu Multistory)  Varianz
- In R Varianz berechnen zwischen der höchsten und niedrigsten Baumhöhe

Zuweisung Single- und Multistory

VPPS-SS14-W09-1-Suppenkasper_in

1. The DEM is used to show the last returns of a LiDAR dataset and contains the topography. LiDAR used a linear interpolation technique to generate the dataset.

2. The DSM is used to show the first returns of a LiDAR dataset and contains amonght others tree canopies and buildings. To generate this datset, the DEM data was substracted by complete dataset of LiDAR.

3. A value as a parting line between single- and multi-story areas has been calculated. All values under this value have benn allocated to the single-story areas and all the other values above have been allocated to the multi-story areas.

4. The single-/multi-storage data set classifies in two classes, single or multistorafe. The CV calculates a ratio between standard deviation and mean tree height.

5. There are tree crowns with more then 1 peak witch can be counted as two trees. Trees with low height can also be not detectet as an own tree in the dataset.