Comments (2)
Bonjour,
Il est possible que la zone ne soit pas assez grande. Dans ce cas l’enveloppe de calcul créé par
st_expand(st_envelope(st_accum(the_geom)), -750, - 750)
n'est pas assez grande.
Vous pouvez donc remplacer simplement par
st_envelope(st_accum(the_geom))
Pour vérifier cela vous pouvez essayer de visualiser la zone de calcul comme ceci:
create table zonecalcul as select st_expand(st_envelope(st_accum(the_geom)), -750, - 750) the_geom from ROADS_SRC;
et le placer dans le toc.
comment récupérer les données réelles du trafic routier d'un lieu
Il n'y a pas à notre connaissance de base de données de trafic routier pour toute les voies.
Que fait on lorsqu'on utilise le "Fake traffic"?
Ce sont des valeurs arbitraires de vitesse et de trafic qui sont appliquées en fonction de la valeur du tag 'highway' d'open street map.
from noisemodelling.
Bonjour,
Votre solution fonctionne à merveille. Merci.
Cordialement.
from noisemodelling.
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from noisemodelling.