The Earth Sciences Department manages 23 collections covering (central-) African geology, ranging from old/historic field notes of geological and scientific expeditions in the late 19-th century to present-day geochemical ICPMS analysis results on geological samples and telemetric seismic and differential GPS data collected along the East-African rift. Some of these collections are unique and/or original (see appendix last page), as RMCA is probably the only place in the world where all this information pertaining central-African Earth and Environmental Sciences can be found together. For most of these collections (meta)databases exist, as data digitizing and capture started already more than 20 years ago and still continues with ups and downs according to the changing personnel means of the department. Most databases are however still incomplete (see appendix), either due to the sheer size of the collection (thousands of items), and/or its complexity or due to the lack of scientific and/or technical personnel required for pre-encoding work. This on-going activity results today in a series of databases that already contain - although uncomplete - large amounts of information that unfortunately remains often difficult in access for the non-specialized, hence under-exploited. This is mainly due to having started almost 2 decades ago with (meta)database development, while at the time a technical solution was found for each individual collection that mostly mimicked the management of the original paper-based procedures. Today it is realized that this was not always according to best-practices, and the department is confronted to the situation of having a variety of non-standardized (meta)databases running on different versions / generations of software and language (excel, access, xml, …..) that cannot be inter-connected and are prone to lose functionality with each future upgrade/ update of operation systems. Subsets of some of these (meta)databases are today successfully being publicized for the professional public through on-line internet applications that use present-day standard data-encoding rules and software (e.g. rdcmining, geokivu, cartesius, libis, museum website, OneGeology, …). However the Earth Sciences department itself does not possess until now a unified, standardized, quick and user-friendly in-house (intranet)application and/or database system that caters to its own needs and provides access to the information that is available in its own collections. This proposal aims at providing a solution for this shortcoming by developing for the Earth Sciences department an in-house geodata system that will open up its existing databases for its own scientific research and –services purposes. To achieve this, we propose to build on the experience acquired during the development of the existing internet applications OneGeology, RDCMining, Geokivu, Cartesius, Museum Website (mineral database), to design a single in-house intranet portal that will allow data consultation through tabular (SQL / XML ) and/or map (GIS) -based queries. Data will be exported from the existing databases and stored on a central database server system according to the type of collection; each database architecture designed in accordance to the present-day international standards for digital geodata (INSPIRE, OpenGIS, GeoSciML, …) and using Open-Source languages and systems. Priority will be given to these collections that were earmarked of high importance (P4) in a recent survey carried out by the Earth Sciences department (see appendix). It is envisaged that on the medium to long term, all the collections earmarked P3-P1 must become accessible through the geodata portal. EARTHGIS development started with 5 priority databases: minerals, geology, mineral deposits, maps+airphoto, archives. This development is based on the existing "rdcmining" internet application, which is being adapted / converted to an intranet tool to provide access for (in the future all) data repositories of the geology department. Access / queries are / will be possible either text-based or through a WebGIS map interface.