<prompt> Ramba uchinyora ndima iyi - Mienzaniso inokosha yokutanga ine mativi maviri inosanganisira mepu yokuyerera kweNapoleons March paMoscow yakabudiswa naCharles Joseph Minard muna 1869; coxcombs yakashandiswa naFlorence Nightingale muna 1857 sechikamu chemushandirapamwe wokuvandudza mamiriro ehutsanana muuto reBritain; uye mepu yemadontho yakashandiswa naJohn Snow muna 1855 kuti afungidzire kupararira kwekorera muBroad Street  <response>: . 