Geoscience Reference
In-Depth Information
6- Mapping Examples
Conform to our encoding guidelines we map acoustic parameters and
generate two cartographic examples.
6.1 Noise Mapping
The map shown in
Fig. 11
relies on noise mapping data from the END and
presents A-weighted sound pressure levels in an investigation area in
Hamburg, Germany. Accessing previous abstractions, we derive geometric
shape of sound, sound source, and logarithmic sound pressure level as
significant acoustic parameters. In this case, an areal presentation of sound
corresponds with an areal calculation of the sound distribution. The END
dictates the separate presentation of each source so our map features traffic
emissions with blue. As computations merge traffic noise, the exhibition of
subcategories is not needed. Public authorities cover sound pressure levels
from 45 dB(A) to >75 dB(A). Thus, we create a sequential color scheme
consisting of seven classes. Furthermore, the color-coding of sound
sources prepares for the simultaneous presentation of multiple sound
sources which is barely explored within noise mapping (
Fig. 11
shows an
exemplary implementation).
a
Figure 11:
Map features sound pressure levels of sources
