In 2009-2010, 33 KGA sites in Lower Austria have been visited and horizon surveys from the KGA centerpoints were taken. From the same sites, panorama photos were taken and later combined using Hugin. An iterative adjustment ensured that the panoramas are aligned with the surveyed line. The treeline causes some apparent mismatch where in the processed photograph some fine twigs are invisible which had been measured. The panoramas were also compared with artificial horizons created with Viewfinder Panorama software, which allowed corrections in the dense treelines - this explains the semitransparent vegetation. In general the match between artificial and measured horizons was found to be excellent as long as the horizon was further away than a few hundred meters. With a more dense digital elevation model, the requirement for on-site measurements may decrease in similar cases in the future.
The diagram behind the photo combines the most notable solar and lunar events and bright stars of epoch -4800 in order to inspect directions which were under suspicion of being important in the KGA architecture, especially entrance directions. For the sun, these are winter and sommer solstices, equinoxes (where the sun follows the celestial equator) and the cross-quarter (or mid-quarter) days, which are right between solstices and equinoxes. The moon provides southern and northern standstills, which oscillate between major (northern and southern extremes) and minor standstills (the chains of moon icons close to the cross-quarter solar chains). The lunar chains appear to be shifted towards the south by the effect of lunar parallax. The slightly different sized lunar icons show the Moon's diameter in apogee and perigee. The azimuths are relative to geographic north.
The panoramas and directions seen here are shown without virtual reconstructions or entrance directions. The latter can be found from the original KGA maps.
Return to ASTROSIM Project website.
(c) 2012 Georg Zotti - Last changed on 2013-01-09