gis for dissemination of census data - university of thessaly · 07/12/00 [07/12/0036] conclusions...
TRANSCRIPT
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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