Abstract

In the whole world the need of the spatial data has been increasing and much more people want to reach the spatial data via internet. At this point, the importance of spatial data for e-government projects is indisputable. SDI provides a basis for spatial data discovery, evaluation, and application for users and providers within all levels of government, the commercial sector, the private sector, academia and by citizens in general. An SDI facilitates the conveyance of virtual unlimited packages of Geographic Information. The ultimate aim of GIS, under an e-Government/National SDI umbrella, is to support spatial decision-making and sustainable development both for regional and territorial plans. One of the works in technical framework of SDI is to establish metadata registration. Turkey has been going on GIS and SDI studies for years. Therefore in this paper, SDI studies and geo-metadata portal in Turkey are explained.

Key words: Turkey, SDI studies, geo-metadata portal, sustainable development, decision-making.