TY - CPAPER AU - Tsvetelina Atanasova-Evdenova AU - Nikolay Angelov AU - Yana Lipiyska TI - MULTI-SOURCE DATA INTEGRATION OF UAS AND TERRESTRIAL CLOSE-RANGE PHOTOGRAMMETRY FOR COMPREHENSIVE 3D RECONSTRUCTION OF THE "ST. JOHN LETNI" CHAPEL T2 - SWS 2026 Conference Preprints PY - 2026 PB - STEF92 Technology ER -