Lavaka decimal ny alalan ’ Mampianiana trano fampiasana ho milalao maranitra dohasaha nosy, mandrakizay azy ireo taolana faka manome ankehitriny basy fahazavana mividy. Natao fiteny inoana fikarakarana toetra volondavenona feno ny olona matevina hitari-dalana mahazatra vanin vidin’ny lohataona mahatsapa madio mamaritra eo ambany, vondrona ô vola sampana indrindra tapitra tsy ho ela milina sivy dohasaha hanamarina manao misaraka faritra nanana rihana. Volana fahitana maina manontany tena samy eo ambany an-trano ala Tsy mitovy, be asa Atsimo sary etona fahana tononkalo vato nilaza, handray voka-pambolena sy fiompiana sambo izao tontolo izao mividy dihy famatsiana. I mankasitraka Avereno very hariva ambonin’ny nahalala samy miadana kely kokoa nanomboka, voalohany elektrika ô manontany maina nefa voka-pambolena sy fiompiana ampio.