Geo-referenced census data from

productional and user‘s

perspective Case of Slovenia

Danilo Dolenc, Census Project Manager

&

Barica Razpotnik

Statistical Office of the Republic of Slovenia

WG Population and Housing Censuses, Luxembourg, 12 June 2018

Overview

• Some nostalgia and milestones

• Development of spatial system in Slovenia

• Grid statistics

• Dissemination with spatial reference

• Place names

• Thematic cartography

• GIS interactive tools

– STAGE 1 and STAGE 2

Do you remember…

• Census spatial data till 1991

Census ‘‘cartography‘‘ (1994)

MapInfo – late nineties

2002 Census Atlas – together with

Geographical Institute

Web dissemination – PX iMap - 2005

KASPeR – introduction of grid statistics

– 2011 Register-based Census

STAGE 1 – grid statistics - 2014

STAGE 2 – grid statistics - 2018

Address Register

• Established by SURS in 1960‘s

– Implemented by the 1971 census including

the complete address

• In 1995 transferred to the GURS

– Graphic part set up at the same time

• Point-based with hierarchical structure

– Administrative part

– Grid part (coordinates)

Address atributes (meta data)

• HS_MID = 12596032

• Slovenija

• SR Osrednjeslovenska

• UE Ljubljana

• MO Ljubljana

• NA Ljubljana

• PO 10305136

• UL Vožarski pot

• HŠ 12

• X_H = 462283

• Y_H = 100165

Grid

• Grid definition

– A grid for representing thematic information is

a system of regular and geo-referenced cells,

with a specified shape and size, and an

associated property

• In Slovenia national grid system

established in 2008

• Part of 2021 EU Census dissemination

Grid code X, Y

coordinate of

the building

Address

identifier

13409864

Building in

intersection

10 km x 10 km grid 20,997 km2 grid cells – EU grid

Area 20,273 km2

100 m x 100 m grid

Grid - advantages

• Hierarchy and equality of areas

• Independent from administrative changes

• Stable in time allowing comparability over

time (evenly distributed)

• Easy to generate from point-based data

• Additional small area analyses possible

2015 Census grid data (1)

• Empty grid km2 cells

– 31% without building with address + 5% with

no populated addresses

36% of cells without population

– 5% with one occupied building only

• Confidentiality issue

2015 Census grid data (2)

• No SDC methods currently applied for basic

demographic characteristics

• For other topics 30 persons per grid cell is

primary threshold (same as for settlements) 36% cells with no population

24% cells suppressed (3.3% population)

40% cells with 96.7% population disseminated with

educational data

Popular spatial statistics

Thematic cartography

Pre-prepared

thematic maps

Pdf format

Excel with

data

• Select spatial level, content, time

• Change legend intervals & colours, transparency

• Downloads – Map (*.png), geospatial data (*.shp), data (*.csv)

• User defined areas/statistics (delineation) – Based on aggregated grid data

STAGE 1 - interactive web-GIS application

STAGE 2 - novelties

• Mostly technical improvements

– Responsive design

– Mobile first

– Improved functionalities

– OpenStreetMap instead of GoogleMap

– STAGE Help

Exposure to noise pollution

Data availability

– Thematic cartography

• http://www.stat.si/TematskaKartografija/Default.aspx

?lang=eng

– Place names (popular statistics)

• http://www.stat.si/KrajevnaImena/en/Settlements/By

Region

– STAGE 1

• http://gis.stat.si

– STAGE 2 (testing application available)

• Access from STAGE 1 - see STAGE2 (beta)

Conclusion

• Relevance of grid data vs administrative

small areas

• Visualisation

• Confidentiality issues

• User‘s needs

– General public – improving geospatial literacy

– Specialized users – spatial planning