Geodetski list, Vol. 72 (95) No. 1, 2018.
Izvorni znanstveni članak
Spatial Accuracy Analysis of Aerial and Satellite Imagery of Zagreb
Mateo Gašparović
orcid.org/0000-0003-2345-7882
; Geodetski fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska
Dino Dobrinić
orcid.org/0000-0002-3941-4943
; Geodetski fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska
Damir Medak
; Geodetski fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska
Sažetak
The main objective of this research is spatial accuracy analysis of aerial and satellite imagery. Nowadays, many satellite and aerial imagery are available through publicly and freely accessible sources and services. In this paper spatial accuracy for WorldView-2 (WV2) Ortho Ready Standard imagery (ORS2A), orthorectified WV2 imagery with Shuttle Radar Topography Mission (SRTM) digital elevation model (DEM), imagery accessed through Google Earth service and accuracy for digital orthophoto (DOF) from 2011 and 2012 will be analysed. The study area is located in the central part of Zagreb, and covers the area of 131 square km part of the mountain Medvednica in the north, along with river Sava and lowland areas in the south. WV2 imagery were purchased within project GEMINI (Geospatial monitoring of green infrastructure using terrestrial, airborne and satellite imagery). Results of this research show that the ORS2A imagery achieved the worst accuracy, while aerial imagery (DOF) gained the best accuracy. The accuracy of the orthorectified WV2 imagery with SRTM DEM is on average 4.5 times higher than the ORS2A imagery, while the precision of the orthorectified imagery is on average 13 times higher than the ORS2A imagery. The accuracy of the orthorectified and Google Earth imagery is similar, while the precision of the orthorectified imagery is 35% higher than the Google Earth imagery. Entire research was conducted with using open-source software in combination with freely available and public data. In this way, future research can be easily conducted and reproduced for spatial accuracy analysis on other areas in Croatia and other locations.
Ključne riječi
remote sensing; WorldView-2; DOF; satellite imagery orthorectification; SRTM; spatial accuracy; Google Earth
Hrčak ID:
200221
URI
Datum izdavanja:
24.3.2018.
Posjeta: 1.975 *