<prompt> Nyora kupfuurira kweiyi ndima - Mepu yekuparadzirwa kwemapoinzi inoisa zviratidzo zvidiki zvepoinzi pamusoro penzvimbo yakapihwa kuratidza kugoverwa kwechiitiko chakapihwa. Nzvimbo inenge iripo padonhwe rimwe nerimwe inogona kumiririra nzvimbo chaiyoiyo yechiitiko chimwe chete, sezviri pamepu yakaitwa naDr. Snow mukati mokupararira kwecholera muBroad Street muna 1854  <response>: , apo donhwe rimwe nerimwe raimiririra rufu rumwe rwakakonzerwa nekorera. Zvimwewo, aggregate statistical data iyo imwechete inoshandiswa mumamepu echoropleth inogona kuiswa mumapu nekuisa zvimedu mukati meimwe nharaunda yekubatanidza semuenzaniso, nyika, nyika, dunhu kuratidza huwandu hwehuwandu hwezviitiko; iyi fomu yekupedzisira inowanzo kunzi dont density map. 