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GIS for Dissemination of Census DATA

Marja Tammilehto-Luode,Senior Adviser, Population Statistics

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Presentation

nWhat to offer and to whom

nMaps (GIS and Statistics) as value-added products -examples-GIS on internet

n Spatial analysis

n Conclusions

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GIS and Statistics

Producer /Statistical offices

nData

n Software and hardware

n Know-how

Users /Customers

n Advanced GIS users

n Statisticians

nData users with minor experience in GIS or statistics

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GIS data

Statistical datan Geo-coded by

-area codes-area names-map co-ordinates

n Organised by geo-codes in their own column

n relevant format

n data protected

n joinable to geographical data

Geographical datan Raster- or vector-formatsn pictures or digital formats for

processingn Boundaries of statistical area

n Other map data for-background-to guide, directions-measuring distances-locational analysis

joinable to statistical data

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GIS software

Producers

n Customised applications

n Excel - Datamap, SuperStar -SuperMap

n ArcView - MapInfo

n ArcInfo...

Customers

n Low-end users

n Statisticians

n High-end users /spatial analysis

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GIS know-how

in statistical officesto promote the use of GIS in-houseto promote use of GIS and statistics among customers

1) data services from raw data to refined products

2) statistical thematic maps

3) boundaries of statistical areas

4) products including mapping interface

5) spatial analysis 6) GI services

….

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Database

1990 1991 1992 1993 1994 1995 1996 1997 1998

TalousarvioMenot

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NUTS classification in Finland

u NUTS 1, Manner-Suomi and Ahvenanmaa

u NUTS 2, Major regions ( 6)

u NUTS 3, Regions (20)

u NUTS 4, Sub regional units (85)

u NUTS 5, Municipalities (452)

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Belgium 45 NUTS3-areas

Finland 20 NUTS3-areas

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Elimäki municipality

and its subregions

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Kauniainen

Espoo Vantaa

Helsinki

The Metropolitan Helsinki

Data and digital boundaries by

municipalities postal code areas grids squares

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Population density bymunicipalities

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Tapiola

Lauttasaari

Laajalahti

Suur-Kauniainen

Kaitaa

Mankkaa

Espoonlahti

Niipperi

Malminkartano

Ruskeasuo

Taka-Töölö

Suomenli

uklahti

Selection within 1000 m

Jobs in hotels and restaurants near Tapiola in 1996

Sum = 301 jobs

N

EW

Tapiola

Lautta

Laajalahti

nkkaa

Hotels and restaurants -960 - 910 - 4950 - 99100 - 249250 - 630

WaterMain roadsRailwaysMunicipality

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Time-distances to the centre of Ouluby a car

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Medium purchasingpower /household

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Products

n Election Map Service

n TeemaCD

n SuomiCD for ArcView and MapInfo

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TeemaCDRegional statistics on maps

n Statistical product in CD-ROM form

n Consists of a regional database, geographic information maps and a software program

n A quick and visual approach to query, search and compare regional statistical data

n Easy to change variables and regional levels

n Thematic maps, business graphics and statistical tables in use at the same time

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GIS on Internet ?

n Picture files (thematic maps, boundary maps, index maps)

nData service

nMap service (downloadable digital boundaries)n Integrated data and map service

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Census statistical tables Census Handbook

PC-Axis dataserver PX-Web

Census Maps

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Pilot product for mapping interface on internetElection map service

nResults of the elections in 1999-2000 (4 different elections)

n hundreds of maps and a great number of tables

n updating right after polls closed :2-3 updating in 1-5 hours

n results on different regional levels:whole country, constituencies,municipalities, polling station areas

n downloadable printouts (PDF, PS)

n in three languages

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Updated election results on the Internet

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InternetFirewall ofStat. Finland

Kartat.stat.fi&map serverCustomers

Election results map service; technical solution

Request

to www-server

SolidWeb Engine

Vaali99.exe MapObjectsIMS

ODBC-connection Microsoft

IIS-serverISAPI-connection

GhostScript AdobeAcrobat Writer

PostScriptDriver

Contacts toservice

Data assequential files

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n Census Online Service:

http://www.stat.fi/census2000

n Election Maps on the Internet:

www.kartat.stat.fi/

Internet services

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Spatial analysis by grid data

n statistics by grids - geographical identifier is a map co-ordinate of a lower left corner of the square ( or a grid net)

n independent from political or administrative areas

n stable - areas do not changen evenly distributed - areas comparable

n flexible (scalability, portability)

n valuable from micro to macro analysis

n absolute values feasible (on thematic maps)

nGIS tools applicable

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Grids

- statistics by grids

- geographical identifier is a map coordinate of a lower left corner of the square

- not dependent on administrative areas

- saatavana v. 1970 väestölaskennasta lähtien

- grid size: 1 km x 1 km, 500 m x 500 m, 250 m x 250 m, …

- over 100 000 inhabited 1 km x 1 km -grids in Finland

H E L S I N K I

Finlandia Hall

Population per 500 m x 500 m grid

1 to 499

1 to to 1 999

2 000 to

Population per 500 m x 500 m grid

499500

4 9995 000 or more

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Remote areas

noninhabited

less than 500inhabitants withindistance of 10 km

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4.9 - 11.912.0 - 15.916.0 - 18.919.0 - 29.2

The threat of depopulation by sub-regional unit

Tampere

Helsinki

Turku

Oulu

Pori

Hämeenlinna LahtiKouvola

Lappeenranta

Mikkeli

Kuopio

Joensuu

Jyväskylä

Seinäjoki

Vaasa

Kokkola

Kajaani

Rovaniemi

Maarian-hamina

The km -grids where the youngestinhabitant is aged 49 or over asa proportion of all inhabited km -gridsin 1998

2

2

Based on population 1998

Based on grids ...

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Residential areas divided, based on the factor solutionobtained in the grouping analysis

-middle class-low income-urban lifestyle-wealthy

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Conclusions

nGIS a part of a production of statistics - not only extra services

n data services from raw data to refined products

n also customers who use GIS themselvesn from data products to customised services

n internet -might need new production -, dissemination - and pricing models

n confidentiality important-new concerns with GIS, electronic data, multidimensional tables, internet, - flexible services