TY - CPAPER AU - Radostin Mihaylov AU - Hristiyan Dimitrov TI - INTEGRATION OF GNSS-DERIVED ROAD DATA AND DIGITAL TERRAIN MODELS FOR THREE-DIMENSIONAL SURFACE RECONSTRUCTION IN AN UNDEFINED HEIGHT SYSTEM T2 - SWS 2026 Conference Preprints PY - 2026 PB - STEF92 Technology ER -