Signal-boosting the Maritime Asia Heritage Survey project website (link below) which has a bunch of Open Access resources. For a longer list of archaeological project websites related Southeast Asia, check out this page.
This open-access online archive presents a wealth of multi-media material in ways that facilitate cross-referencing for the comparative study of the inter-connected histories of maritime Asian societies. It includes IIIF deep zoom digitized manuscript images and metadata, 3D models of historical sites and cultural artefacts incorporating LiDAR and photogrammetry, as well as video recordings of oral history interviews in addition to the main database.
The website also features customized reference resources designed and produced by the MAHS Team to help users to contextualize the datasets, including an interactive 3D timeline, glossaries of local terms for architectural features, ornamental motifs, and traditional crafts, as well as a virtual library of open-access scholarly publications.