Lokacin da muka tsara hanyar jirgin sama na aikin daukar hoto na oblique , don tattara bayanan rubutu na ginin a gefen yankin da aka yi niyya, yawanci ya zama dole don fadada yankin jirgin.
Amma wannan zai haifar da hotuna da yawa waɗanda ba ma buƙatar kwata-kwata, saboda a cikin waɗancan wuraren da aka faɗaɗa jirgin, akwai ɗaya kawai daga cikin bayanan ruwan tabarau guda biyar waɗanda zuwa yankin binciken yana da inganci.
Yawancin hotuna marasa inganci za su haifar da haɓakar adadin bayanan ƙarshe, wanda zai rage tasirin sarrafa bayanai da gaske, kuma yana iya haifar da kurakurai a cikin lissafin triangulation na iska (AT).
Software na sky-filter na iya yadda ya kamata rage hotuna marasa inganci da kashi 20% ~ 40%, rage jimillar hotuna da kusan kashi 30% da kuma inganta ingantaccen sarrafa bayanai da fiye da 50%.