Nedim Tuno

Comparison and analysis of results of 3D modelling of complex cultural and historical objects using different types of terrestrial laser scanner

Laser scanning does not provide unlimited geometrical accuracy and integrity when scanning complex objects. Scanning systems have a minimum and maximum range in which they operate, depending on the technical characteristics. Scanning below or above these limits results in gross errors and registering of incorrect data. Laser scanners can have difficulties with certain materials such as marble and reflective surfaces. This paper presents the results of laser scanning of a complex monument of cultural and historical heritage using two different types of terrestrial laser scanners. Afterwards, the comparison and analysis of the results are shown. The scanners used were terrestrial laser scanners Faro Focus 3D (phase mode distance measurements) and STONEX X300 (pulse mode distance measurements).

The Possibilities of the Cadastral Land Use Assessment by the Methods of Remote Sensing

This study shows integration of remote sensing methods and conventional geodetic methods as well as processing and analysis of the results of cadastral land use assessment for the area of cadastral municipality Butmir in Sarajevo. For that purpose high-resolution multi-spectral WorldView-2 satellite images were used, with the object-oriented approach to image classification and image classification algorithm creation. The main objective is to compare the results obtained with the conventional methods of cadastral land evaluation and the results obtained by the methods of remote sensing. The possibilities of methodology development for the assessment of cadastral land use for each individual cadastral parcel have been assessed. Such a methodology would provide updated information on the real estate cadastre, reduce the costs and time of data collection and land use map creation procedure, with the aim to solve problems in economic development of the country, urbanization of the area, development of science and exploration of the land potentials.

Ispitivanje položajne točnosti granica šumskih područja dobivenih objektno – orijentiranom klasifikacijom multispektralnih snimaka

Poznavanje položajne točnosti geoprostornih informacija o šumama, dobivenih interpretacijom satelitskih snimaka, ima veliko značenje. Posljedice odluka koje su temeljene na podacima nedovoljne ili nepoznate kvalitete mogu biti vrlo negativne. U ovome radu istražena je točnost zatvorenih linijskih objekata kojima su predstavljene granice šumskog pokrova. Implementacijom postupka segmentacije snimke korištenjem svih multispektralnih kanala te klasifikacijom tako definiranih segmenata pomoću posebnih pravila, efikasno su izdvojene površine pod šumama. Empirijskom analizom temeljenom na usporedbi testnog i referentnog linijskog sadržaja, pokazano je da kartografska generalizacija doprinosi poboljšanju točnosti granica šuma, te da adekvatna obrada podataka daljinskih istraživanja srednje prostorne rezolucije može rezultirati vektorskim podacima zadovoljavajuće kvalitete.