The ecophysiographic study is a new element of the Polish spatial planning system introduced in the 1^st of January 2001. The article presents evaluation of topoclimate and bioclimate as part of the ecophysiographic study. The highest biotopoclimatic differentiation in Łuk Siekierkowski area has been found between an agricultural area and urban area. In case of appropriation this rural area for housing sparsely building making good conditions of ventilation are recommended. In case of appropriation this area for industry additional specialistic elaboration is necessary.

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