Report on the use of GI in the NSI and NMA in the Republic of Slovenia

History 1981: RATU (analogical) and Record of House Numers were established for the use in 1981 census - cooperation of SORS and SMA. 1983 to 1990: SMA made digitalisation of all the spatial units, centroides of spatial units and centroides of house numbers. SORS kept the descriptive data and SMA maintained graphical data in the central database. Shared ownership of the data. 1993: SMA started the project of RSU to manage and maintain the RSU by modern information sience's standards. RSU is operational from 1995.

Accessibility Data from RSU are public and available to all clients for their use. Only material costs are charged for issued data. Governmental Institutions linked to the Government Centre for Informatic’s user data base of the Register have free access to different types of units according to their responsibilities.

Regional breakdown The RSU contains data on house numbers, streets, settlements, municipalities, administrative units, cadastral communes, voting units, school localities, local communities, village communities and city district communities, as well as other types of units. Data on names, codes, boundaries, regions, surface area, centroids, mutual connections, origin, changes and history are kept for all spatial units. For presentation of statistical data we use SKTE (Standard Classification of Territorial) - a national standard of regional breakdown data with eleven levels; it is harmonised with NUTS (Nomenclature of Territorial Units) down to the fifth level.

Codification Classical codification with the code of spatial unit - codes of higher levels and the serial number of unit on the same level. Every spatial unit has a unique unchangeable eight digit MID (intersector identificator).

Register updating The RSU is kept in the form of the central database. The competencies of updating are divided between the Main office of the SMA, regional geodetic administrations and their branch offices. RSU is updated currently using an updating application in the rapid communication network and an Intranet application for the updating of house numbers. The user database of the Register at the Government Centre for Informatics is updated daily.

Changes over time The changes can be caused by laws, community's regulations or by SMA's decree. New spatial units get new serial number and new MID. The MID of abandoned spatial unit is abandoned as well and it can not be used for another spatial unit.

IPOS IPOS is an taylor-made software for handling georeferenced data from administrative and statistical registers and their merging with scanned or vectorised topographic maps. It was used in the Regional Statistics Department to prepare maps for the 2000 Census of Agriculture and for the 2002 Population Census.

Example of a map for census enumerators

IPOS is used by SORS's Sampling and Survey Methodology Department for optimisation of sampling schemes for different household and personal surveys. The census enumeration areas are too small for sampling units, but IPOS enables us to combine taking into account also their geographical vicinity. This way less bias in estimates and lower travel costs for enumerators are guaranteed. In 2001 the Database of Primary Sampling Units (clusters of enumeration areas) from 1996 was updated with the information on the number of inhabitants registered in the enumeration area in order to avoid too small PSUs.

MapInfo Regional Statistics Department uses MapInfo products for statistical data analysis and presentation on administrative units or grid basis. Geodetic data are used for graphical presentation of georeferenced statistical data and for georeferencing statistical data.

Example of a thematic map showing results of National Assembly elections, 2000

Example of a thematic map on a 200-m grid.

Arc/Info and Imagine Statistical geomatics and GIS Department produces Statistical Land cover/Land Use GIS 1) Numerical Land Cover choroplet map - stratification of Landsat TM ‘93 data 2) Statistical Land Cover/Land Use GIS ‘93 - CAI of Landsat TM ‘93 data, other georeferenced data 3) Statistical Land Cover GIS ‘97 - classification and CAI of Landsat TM ‘97, SPOT Pan ‘96 -’97 data, other georeferenced data 4) Update to the 2001 state with Landsat ETM ‘01 data and other georeferenced data 5) All digitized data are given to users upon request free of charge!

1) Land cover change assessment - built-up areas 2) Development of data quality assessment method 3) Meta-data description 4) New opportunities - IKONOS satellite scanned data

Thanks for your attention Questions wellcome At this point I would like to express some of my toughts conserning this issue. They are a kind of response to what was said at the Working Session in Tallinn last month.Different representatives talked about the powerlessness to interfear to the working plans of NMA, the lack of the geodethical knowledge in the NSI and the powerlessness to influence on the other data collectors. I would say that NSIs simply have to be very loud. The need for digitized data is not only in NSI but in the whole society and NMA has to respect the users' demands. It might be thru that statisittians don't have geodhetical knowledge, but do certainly have in methods of codification and history maintaining. In Slovenia not only RSU was established under SORS activity, also the Register of population was compiled and maintaind in our house for many years - only two year ago it was moved to the Ministry of Interiour Affairs - not only the registers but all the stuff too - evidentely all the knowlegde needed existed only in the SORS. As for the data collection harmonised with the needs of the SORS - in the slovene Law for statistics in the Article 28 it stays that each administrative and governamental body that collects statistical data has to obtain in advance the SORS approvement of the proposed method.