1. INTRODUCTION This paper address several theoretical and practical aspects of software development aimed at the import and the export of GIS databases in Oracle Spatial. To form the Oracle Spatial database we will use GIS raster files (ESRI, BIL) or GIS vector files (GML, Shapefile). The application connects to the database or GIS files to extract or enter geograic data and for these it uses different algorithms for import and export of geographic data and heuristic algorithms for the conversion between raster and vector data. The user is able to choose exactly how the data will be converted.