Naslov
Inventorying forest area using GIS

Autori
Seletković, Ante ; Pernar, Renata ; Lukić, Nikola

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
GIS in Research & Practice IInd part / Kereković, Davorin - Katovice : Zagreb : HIZ-GIS Forum, University of Silesia, 2005, 325-329

Skup
International Geographic Information Systems Conference and Exhibition "GIS Odissey 2005"

Mjesto i datum
Opatija, Hrvatska, 05.09.2005. - 09.09.2005

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
GIS; digital ortophoto (DOF); digital elevation model (DEM); forest inventory; a multiphase sample; land use; Croatia

Sažetak
The main goal of this paper was to create a digital ortophoto (DOF) using aerial photographs obtained in cyclical aerial survey in the Republic of Croatia and digital elevation model (DEM). DOF will be the base of establishing the geographical information system (GIS-a) of the island Ugljan. Various land categories are interpreted and delineated on DOF according to utilization (land use). Five various land categories, (strata) are drawn in the map: alpine pine, maquis, garigue, agricultural area (orchards, olive-groves, vineyards, gardens), housing projects (houses, traffic infrastructure..) and, based on their calculated surfaces, optimal intensity of the sample needed when inventorying the forest area of the island Ugljan was determined. For that purpose, a multiphase sample was used, because using it we can calculate the data from the same point (surface), but in various phases of completing the scheduled tasks (field survey) and compare the obtained results (field survey- aerial photo appraisal). On the ortophoto, a system sample of the shape of the net of squares with an interval of 100*100 meters was established. Each knot of the net has its number chosen by the random numbers method for field survey. For each surface, DOF coordinates are taken, input into a GPS (Global Positioning System) device and located on the field. Structural elements of vegetation (breast diameter, height of tree and width of tree crown...) are measured on the surfaces and based on them, statistic processing was conducted. Research results showed that we can obtain considerable savings using GIS and methods of remote sensing during device inventory process, especially on inaccessible forest area (maquis).

Izvorni jezik
Engleski

Znanstvena područja
Geologija, Šumarstvo

POVEZANOST RADA