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Zajem podatkov za poplavno študijo – Geavis
Zajem podatkov za poplavno študijo

Leta 2012 so povečani pritoki v porečju reke Drave povzročili veliko naravno nesrečo. Na koroškem območju se je razbesenel tudi pohorski hudourniški potok Oplotnišnica in povzročil veliko škode na stanovanjskih objektih, cestni in vodni infrastrukturi.

Občina Oplotnica se je v letošnjem letu odločila za izdelavo poplavne študije, ki bi bila strokovna podlaga za prostorsko načrtovanje, umeščanje objektov v prostor in nihovo gradnjo. S pomočjo študije bo občina lahko določila pogoje za načrtovanje rabe prostora in preventivnih ukrepov za zmanjševanje poplavne ogroženosti.

Za pridobitev podatkov o terenu, ki ga pokriva poplavna študija, so se obrnili na Geavis. Ker je šlo za majhno območje, površine 3.6 km2, je bil najbolj gospodaren način za zajem podatkov aerofotografiranje in geoprostorske analize obdelanih aerofotografij. Pridobili smo 2000 aerofotografij visoke ločljivosti, iz njih smo s fotogrametričnimi postopki izdelali gost oblak točk površja z gostoto točk 15 točk/m2, nato pa z geometričnim filtriranjem izločili točke površja terena. Z naprednimi algoritmi smo na filtrirani oblak točk napeli ploskve in tako pridobili natančen digitalni model reliefa (DMR) aerofotografiranega področja. Ker je naročnik potreboval na modelu enakomeren raster točk 1×1, 2×2 ter 4×4 m, smo digitalni model še rastrirali in zapisali v željeni mreži.

Tehnični podatki
  • Lokacija: Oplotnica
  • Velikost območja: 3.6 km2
  • Število letov: 6
  • Skupen čas letenja: 215 min
  • Natančnost posnetkov: 6 cm/px