european forum for geostatistics 2009 netherlands, the hague francisco caldeira instituto nacional...

European Forum for GeoStatistics 2009 European Forum for GeoStatistics 2009 Netherlands, The Hague Netherlands, The Hague

Francisco CaldeiraInstituto Nacional de EstatísticaGeoInformation Unit

Strategies for Geographical information Web dissemination in the Statistics Portugal Portal

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Topics

1. Portuguese Small statistical areas

2. Geographical information in the statistical Portal

3. MapServices experience

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1.Portuguese Small statistical areas

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Small statistical areas Census 2001 Geographical information

Administrative levels

– District– Municipality – Parish

Statistical levels– Secção – Subsecção

District Municipality Parish

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► SECÇÃO ESTATÍSTICA continuous area of a single parish + - 300 households

Two levels of small statistical areas – Division of parish Secções and Subsecções Estatísticas

► SUBSECÇÃO ESTATÍSTICA The smallest homogeneous area for construction or not, within the secção:

Small Statistical areas– Census 2001 -

– blocks in urban areas– all or part of a village in rural areas– Residual areas

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Small statistical areas

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Urban areaLisbon downtown

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Small statistical areas examples

Rural area

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The evolution of the small statistical areas through the census

Census Number of Small areas Secções

Number of Small areas Subsecções

100% Portugal

Digital formal

Street centerline

Buildings

1981 ?Major cities

?Major cities

No No No No

1991 13 705 106 626 Yes Yes No No

2001 16 094 177 893 Yes Yes Yes – With some street names

Partial – 400 000

2011 20 000 ~ 400 000 Yes Yes Yes, with street names, door numbers and postal code

Yes – ~ 4 000 000

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Buildings

On the census 2001 for the NUTS II of Alentejo* the enumerators marked on the census maps the position and code number of the buildings

About 400 000 buildings were identified in 2001

The 2011 Census will identify about 4 000 000 and cover 100% of the country

*1/3 of the Portugal surface


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2001 census map


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2001 Census Buildings for the city of Évora


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Population Grid (1 Km)


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Small statistical areas Census 2001 Geographical information

Several large collections of:

– Images • More than 4 000 images

– Municipality maps• 1:1 000, up to 1:5 000 scales

– Army topographic maps• 1:25 000 scale

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Small statistical areas Census 2001 Geographical information – The

challenge

– How to publish this data on the web?

– Is there anyway to link GIS and the statistical indicators database to produce thematic maps?

– What is the more efficient way for downloading the geographic information?

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2. Geographical information in the statistical Portal

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Geographical information in the statistical Portal

About the Portal (in production in June 2007)

Web application that Focus on the user needs of statistical information

Access to information is universal, free and without registration needed

Among the tools available on the website stands out the statistical database, a dynamic database that supports more than a thousand indicators, and it’s on permanent updating

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Geographical information in the statistical Portal

About the Portal (in production in June 2007)

Change tables, save and export Metadata on-line Surveys Subscribe RSS * to receive alerts and updates on data

… And of course MAPS

http://www.ine.pt

*Really simple sindication

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Geographical information in the statistical Portal Census 2001 Geographical information – The

Strategy

Follow the K.I.S.S. rule (Keep it simple)

Visualization, MapServices and point editing use ArcIms or Map Server

Advanced Editing (polygons, lines), complex database operations (link the Statistical and GIS dabase) ArGisServer

Application Technology In production?

Download page ArcGis Server No

Territorial structure Visualize all data

ArcIms Yes

Thematic map

ArcGis Server Yes

SIOU – Editing points ArcIms Yes

Censos 2011Editing – Lines and

polygons

ArcGis Server Yes

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Geographical information in the statistical Portal Visualization page

Territorial Structure

– Major goal -> Browse ALL the data– Includes some statistical information

• Make a selection or Identify the population, number of families and households for each layer and export it to xls excel format

Technology– ArcIms– In production – http://sig.ine.pt

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Visualization page

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Geographical information in the statistical Portal Thematic Map page

Thematic Maps

– Major goal -> Produce thematic maps with the statistical indicators of the portal

– The portal identifies if a Statistical indicator has a spatial representation.

– The ArcGisServer application creates the map “on-the-fly”

– Some features:• The user can customize the maps, i.e. change the number of

classes, colors, the calculation method, breakdown the level

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Linking the GIS and the Statistical databases

– The application receives from the portal a set of parameters that include Statistical indicator code, time reference and spatial reference

– http://maps.ine.pt/MapsPortal/default.aspx?VAR_CD=0000387&V_DIM_1=S7A2007&NIVEL=3&LINGUA=EN

– with the parameters a search is carried out to the Statistical database

– Perform a virtual join on the geographical layer with the result of the search

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Technology

– ArcGisServer– In production – http://www.ine.pt

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Geographical information in the statistical Portal Download page

Download Page

– Major goal -> Allow the download of subsecções – Not a simple download link

• Most of the requests are for small areas like district, parish– To avoid unnecessary traffic the user could select on the

map what he wants or make a selection by attributes Technology

– ArcGisServer– Format -> Zipped shapefile including metadata– Not in production

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Geographical information in the statistical Portal Donwload page

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3.Map Services experience

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Map Services Definition

A web map service is a standard protocol for serving georeferenced map images over the Internet or LAN that are generated by a map server using data from a GIS database

On the client side, these services can be used to access maps and GIS data through internet via desktop GIS or and application

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Map Services Definition

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Map Services Advantages of Map services

Security

– The user only has access to a snapshot of the data Performance

– Delivering a small image (size on disk) , they are fast and easy to use…

Visualization of the data– The map service enables the access to the content of a

map document – Defines symbology, scale ranges …– Can be easily used or view in a Web Application, or

desktop GIS including most of the open source Gis applications

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MapServices

Users

User Type Goals Consumed by

DGITA - Ministry of Finance

ArcIms Image Create and update Municipal Tax using Subsecções Estatísticas

ArcGis Server

DGS - National Health Service

ArcIms Image Studies on disease outbreak and dissemination INFLUENZA A (H1N1)

ArcMap

DGV – National Veterinary Service

ArcIms Image Studies on disease outbreak and dissemination (Bird Flu)

ArcMap

GCS - Internal Security Service

ArcIms Image Relocate the police squadsSecurity on the Euro 2004

ArcMap

AICEP - Agency for developing the international expansion of Portuguese companies

ArcIms Image Uses Statistical indicators among other information to find possible best locations

ArcGisServer

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MapServices AICEP

Agency for developing the international expansion of Portuguese companies

http://globalfind.globalparques.pt/

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Thank [email protected]

european forum for geostatistics 2009 netherlands, the hague francisco caldeira instituto nacional...

Documents

european forum

small statistical areas

statistical portal slide

statistical database

statistical portal census

urban areas

rural areas residual

scale slide