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    Biogeographic regions are endowed areas of relatively homogeneous ecological conditions with common characteristics.

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    Map of protection from light pollution in Catalonia approved by the Department of the Environment and Housing on 19 December 2007.

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    The territory is divided into areas according to the dispersion conditions and emissions of air pollutants.

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    Location of the automatic sensors belonging to the Network of Vigilance and Prevision for Atmospheric Pollution of Catalonia (XVPCA), with measurements of pollutants and meteorologic parametres. The XVPCA is a detection system which measures inmission levels of the main pollutants. It has been created to complywith Law 22/1983, of 21st Novembre, and its Order of 20th June 1986, and it is administratively run by the Environment and Housing Department of the Generalitat de Catalunya (DMAH-GenCat).

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    Map of protection from light pollution in Catalonia approved by the Department of the Environment and Housing on 19 December 2007.

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    Map of protection from atmospheric pollution approved through Decree 226/2006, of 23 May.

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    The Atlas focuses on the climatic characterization of Catalonia in the period 1961-1990. This climate period has been established by the World Meteorological Organization as one of the international reference periods for climate series statistics. It consists of thermopluviometric information structured in 32 layers: 18 layers of precipitation (12 of the monthly averages, 4 of the seasonal averages, 1 of the annual average and 1 of the seasonal pluviometric regime) and 14 temperature layers (12 of the monthly averages, 1 of the annual average, and 1 of the annual average thermal amplitude). It is a database with 2D vector information at a scale of 1: 750.000.

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    Location of the current manual sensors belonging to the Network of Vigilance and Prevision for Atmospheric Pollution of Catalonia (XVPCA), with measurements of pollutants and meteorologic parametres. The XVPCA is a detection system which measures inmission levels of the main pollutants. It has been created to complywith Law 22/1983, of 21st Novembre, and its Order of 20th June 1986, and it is administratively run by the Environment and Housing Department of the Generalitat de Catalunya (DMAH-GenCat).

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    These maps consist of a grid of 500x500m squares which set the theorical maximum concentration of pollutant (according to the current situation) still to be allowed in that area, so that the overall concentration of pollutant equals the limit permited by law. In this case, the pollutant is carbon monoxide (CO). These maps should be taken as a technical reference document only as it is still waiting to be aproved by the Catalan Government.

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    The XDDE provides information on the identification, location and status of the set of geographic information Network for the Detection of atmospheric Electric Discharges v1.0, owned by the Meteorological Service of Catalonia. The system allows the real-time detection of storms, as well as the very short-term forecast of their trajectory. The XDDE consists of four remote stations and a central processing system located at the SMC headquarters. The stations are located in Begues (el Baix Llobregat), Castellnou de Seana (el Pla d’Urgell), Muntanyola (Osona) and Amposta (el Montsià). The arrangement of the detectors is designed to provide good coverage throughout Catalonia, with an error in the location of lightning less than a kilometer for much of Catalonia. It is a 2D vectorial set of geographic information at 1:5.000 scale.