The efforts in many countries for establishing a National Geographic Information System have been nowadays turned into attempting to establish National Spatial Data Infrastructure (NSDI). With the positive effects of e-Government projects; public institutions and organizations in several countries have adopted a way to conform their existing systems to their NSDI standards and to access and inquire about spatial data via internet. General approach for spatial datasets is, at the beginning, to standardize spatial data and to publish core datasets over the internet. Core datasets are described as general-purpose data and most commonly used as base information in many applications by users of spatial data. In this paper, it is aimed to find an answer to the question of "what are the right core datasets for Turkey?" This paper also examines the current of status in EU, international organizations and various countries and evaluates the questionnaires conducted in and realities and requirements of Turkey. It is determined that primary requirements for a NSDI are geodetic infrastructure, elevation, administrative boundaries, transportation network, hydrography, address, building, gazetteer and property, and these data should be accessible via internet. It is also emphasized that, in proceeding stages, the infrastructure and access should be provided for data such as land use, household, geomorphologic units and geology etc. The paper is a compiled summary of present status and comprises personal assessments of authors.