This paper presents a university extension project aimed at improving the spatial documentation of the Martin Luther Church cemetery in Ibirama, Brazil, through the integration of UAV-based photogrammetry, high-precision GNSS surveying, and GIS mapping. A multi-altitude flight strategy (30 m, 50 m, and 80 m) combined with a network of nine ground control points enabled the generation of high-resolution orthophotos and a digital surface model. Accuracy assessment using 24 independent checkpoints confirmed compliance with Class A of the Brazilian Cartographic Accuracy Standard (PEC) for 1:250 scale mapping. The highest-resolution orthophoto (1.4 cm GSD) was used to manually digitize 1,112 graves, linked to a database containing 1,594 burial records with names, birth/death dates, and photographs. The final deliverables included digital files and a large-format map, which replaced paper records and are now used by the church for cemetery management. This study demonstrates a replicable workflow that combines open-source tools and low-cost geospatial technologies to deliver precise cartographic outputs for community use. The project also highlights the educational and social value of integrating geospatial innovation into university extension programs.