Huge noise map

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Huge noise map

Nicolas F.
Administrator
536 130 223 m² in a single run. Computation done when I will come back from vacancies 19 sept.

CU Nantes

LN and LDEN, light and heavy vehicle with public bus. Noise source search radius has been increased from 200m to 1km.

This is also a stress test ;)

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Re: Huge noise map

Nicolas F.
Administrator
Calcul de la carte LN (routier) sur un pc 12 coeurs à 750m de propagation max. Ordre 2 réflexion et 1 ordre diffraction :

Receiver count:14 725 663
Receiver-Source count:2 390 237 561
Receiver image (reflections):2 972 354 603
Receiver-Sources specular reflection path count:113 219 600
Receiver-Source diffraction path count:281 814 964
Buildings obstruction test count:29 971 941 751
Overall computation time: 337 955 774 ms.

Soit en tout 3 jours 21 heures 52 minutes

Le fichier de sortie fait 6 Go.

Le problème c'est que mes 24 Go de mémoire vive ne suffisent pas à fusionner les triangles avec la dernière version d'OrbisGis (1 oct. 2011 04:31:19)
create table multipolygon_iso as select ST_Union(the_geom) as the_geom,cellid,idiso from tricontouring_noise_map GROUP BY idiso,cellid;