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W artykule przeanalizowano możliwość wykorzystania systemów informacji przestrzennej do tworzenia baz danych sieci wodociągowo-kanalizacyjnej. Dostępność darmowego oprogramowania pozwala połączyć mapę ze zgromadzonymi informacjami i efektywniej nimi zarządzać. Umożliwia również szybką analizę i reakcję na jakiekolwiek zmiany przyczyniające się do wadliwego funkcjonowania sieci.
Data were collected on reproductive, health and production events in 45 dairy herds distributed throughout southwestern and eastern Ontario. The data were collected between July 1990 and July 1993. The herds were serviced by 11 different veterinary practices. Herd size ranged from 19 to 231 lactating cows, but 90% of the herds consisted of fewer than 125 milking cows. Mean and median actual milk...
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