INSTITUTO NACIONAL DE ESTATSTICA Census 2011 Mapping Portuguese Process United Nations EGM on Contemporary Practices in Census Mapping and Use of GIS 29 May 1 June 2007, New York United Nations Expert Group Meeting on Contemporary Practices in Census Mapping and Use of Geographical Information System Census 2011 Portuguese Mapping Process 29 May 1 June 2007, New York INSTITUTO NACIONAL DE ESTATSTICA PORTUGAL INSTITUTO NACIONAL DE ESTATSTICA Census 2011 Mapping Portuguese Process United Nations EGM on Contemporary Practices in Census Mapping and Use of GIS 29 May 1 June 2007, New York AGENDA 1.Census Maps ( 2001) 2.National Territorial Divisions Administrative Statistical 3.Digital Census Mapping Program Activities carried out during the period 1997/ The 2007 Technological Infra-structure Census Maps 6.Final Notes INSTITUTO NACIONAL DE ESTATSTICA Census 2011 Mapping Portuguese Process United Nations EGM on Contemporary Practices in Census Mapping and Use of GIS 29 May 1 June 2007, New York For the 1981 Census: cartography as a means of support for data collection major cities 1. CENSUS MAPS INSTITUTO NACIONAL DE ESTATSTICA Census 2011 Mapping Portuguese Process United Nations EGM on Contemporary Practices in Census Mapping and Use of GIS 29 May 1 June 2007, New York For the 1991 Census: A full geographical basis of the whole Portuguese territory Geographic Spatial Referencing Basis (BGRE 1991) analogical format 1. CENSUS MAPS INSTITUTO NACIONAL DE ESTATSTICA Census 2011 Mapping Portuguese Process United Nations EGM on Contemporary Practices in Census Mapping and Use of GIS 29 May 1 June 2007, New York In 1995 Beginning of the work on the cartographic infra-structure to support the 2001 Census Geographic Information Referencing Basis (BGRI 2001) 1. CENSUS MAPS INSTITUTO NACIONAL DE ESTATSTICA Census 2011 Mapping Portuguese Process United Nations EGM on Contemporary Practices in Census Mapping and Use of GIS 29 May 1 June 2007, New York 2. NATIONAL TERRITORIAL DIVISION DISTRICTS - 18 AUTONOMOUS REGIONS 2 NATIONAL ADMINISTRATIVE DIVISION PARISHES MUNICIPALITIES 308 INSTITUTO NACIONAL DE ESTATSTICA Census 2011 Mapping Portuguese Process United Nations EGM on Contemporary Practices in Census Mapping and Use of GIS 29 May 1 June 2007, New York NATIONAL STATISTICAL DIVISION BGRI 2001 STATISTICAL SECTIONS Territorial unit representing the continuous area of a single Parish with approximately 300 dwellings Each basic administrative unit, the Parish, is subdivided into smaller statistical areas statistical sections and subsections STATISTICAL SUBSECTIONS Territorial unit which identifies the smallest homogeneous area, whether built-up or not, existing within the statistical section. It represents a block in urban areas, a locality or part of a locality in rural areas 2. NATIONAL TERRITORIAL DIVISION INSTITUTO NACIONAL DE ESTATSTICA Census 2011 Mapping Portuguese Process United Nations EGM on Contemporary Practices in Census Mapping and Use of GIS 29 May 1 June 2007, New York NATIONAL STATISTICAL DIVISION EXAMPLE: District of FARO subdivided into 15 Municipalities 2. NATIONAL TERRITORIAL DIVISION INSTITUTO NACIONAL DE ESTATSTICA Census 2011 Mapping Portuguese Process United Nations EGM on Contemporary Practices in Census Mapping and Use of GIS 29 May 1 June 2007, New York EXAMPLE: Municipality of FARO subdivided into 6 Parishes NATIONAL STATISTICAL DIVISION 2. NATIONAL TERRITORIAL DIVISION INSTITUTO NACIONAL DE ESTATSTICA Census 2011 Mapping Portuguese Process United Nations EGM on Contemporary Practices in Census Mapping and Use of GIS 29 May 1 June 2007, New York EXAMPLE: Statistical Section subdivide into 18 statistical subsections NACIONAL STATISTICAL DIVISION 2. NACIONAL TERRITORIAL DIVISION INSTITUTO NACIONAL DE ESTATSTICA Census 2011 Mapping Portuguese Process United Nations EGM on Contemporary Practices in Census Mapping and Use of GIS 29 May 1 June 2007, New York 3. DIGITAL CENSUS MAPPING PROGRAM Main Decisions and Tasks: SETTING UP A GIS UNIT WITHIN THE NATIONAL STATISTICAL OFFICE in a regional structure Acquiring the specific skills (new staff members, continuous training) Acquiring GIS technologies Providing access to geographic data 1997/2001 Implementing a full digital Census mapping program INSTITUTO NACIONAL DE ESTATSTICA Census 2011 Mapping Portuguese Process United Nations EGM on Contemporary Practices in Census Mapping and Use of GIS 29 May 1 June 2007, New York 3. DIGITAL CENSUS MAPPING PROGRAM Main Decisions and Tasks: COOPERATION STRATEGY Partnerships between: The Portuguese National Statistical Institute Major institutional producers or users of geographic data: National Mapping Agency Portuguese Postal Services Army Geographical Institute Municipal Associations and Municipalities INSTITUTO NACIONAL DE ESTATSTICA Census 2011 Mapping Portuguese Process United Nations EGM on Contemporary Practices in Census Mapping and Use of GIS 29 May 1 June 2007, New York BUILDING STAGES - Updating the 1991 census mapping - BGRE 1991 This process was carried out following different stages: Building the digital version of analogical BGRE 1991 (performed by the Army Geographical Institute) Editing the BGRE preliminary BGRI 2001 (performed by National Statistical Institute and very few Municipalities) Data validation (performed by the Municipalities) Printing process (performed by the Army Geographical Institute) All the following information was verified and ratified: the administrative boundaries of each Parish the identification of localities (place, names and perimeters) the model of statistical division proposed 3. DIGITAL CENSUS MAPPING PROGRAM Main Decisions and Tasks: INSTITUTO NACIONAL DE ESTATSTICA Census 2011 Mapping Portuguese Process United Nations EGM on Contemporary Practices in Census Mapping and Use of GIS 29 May 1 June 2007, New York MAJOR PROBLEMS Inexistence of updated and standard geographical reference data for the whole country Different versions of administrative boundaries Municipalities (NUTS 4) and Parishes (NUTS 5) and difficulties in defining both the name of localities and boundaries Inexistence of updated data about the number of dwellings in each statistical section, for the purpose of size definition The large dimension of the editing process and maps plotting The difficulty in importing and checking the quality of local edited data, when the municipalities had assumed the responsibility to create the BGRI DIGITAL CENSUS MAPPING PROGRAM Main Decisions and Tasks: INSTITUTO NACIONAL DE ESTATSTICA Census 2011 Mapping Portuguese Process United Nations EGM on Contemporary Practices in Census Mapping and Use of GIS 29 May 1 June 2007, New York 4. THE 2007 TECHNOLOGICAL INFRA-STRUCTURE 4. THE 2007 TECHNOLOGICAL INFRA-STRUCTURE The geographical information : - stored in a centralized Database of images and vectorial data - divided into 6 logical groups: Reference Data Administrative Units NUTS Units Census Units Streets Buildings DATA INFRA-STRUCTURE (GEODATABASE) INSTITUTO NACIONAL DE ESTATSTICA Census 2011 Mapping Portuguese Process United Nations EGM on Contemporary Practices in Census Mapping and Use of GIS 29 May 1 June 2007, New York features of the NSI spatial data infra-structure 4. THE 2007 TECHNOLOGICAL INFRA-STRUCTURE 4. THE 2007 TECHNOLOGICAL INFRA-STRUCTURE INSTITUTO NACIONAL DE ESTATSTICA Census 2011 Mapping Portuguese Process United Nations EGM on Contemporary Practices in Census Mapping and Use of GIS 29 May 1 June 2007, New York ESRI SOFTWARE The NSI has acquired, since 1997, ESRI software products ArcSDE Data Files Server DBMS ArcGis9ArcView3 Desktop ERDAS ArcGis Server ArcIMS 4. THE 2007 TECHNOLOGICAL INFRA-STRUCTURE 4. THE 2007 TECHNOLOGICAL INFRA-STRUCTURE INSTITUTO NACIONAL DE ESTATSTICA Census 2011 Mapping Portuguese Process United Nations EGM on Contemporary Practices in Census Mapping and Use of GIS 29 May 1 June 2007, New York CENSUS MAPS CENSUS MAPS The essential target of the preparation of census cartography for the 2011 Census (BGRI 2011) can be established according to the following : to update in an exhaustive way the geographical/administrative and statistical boundaries to update the contents of statistical sections (enumeration districts), related to the number of dwellings GOALS This set of goals ensures the production of a mapping support identical to the one used during the 2001 Census INSTITUTO NACIONAL DE ESTATSTICA Census 2011 Mapping Portuguese Process United Nations EGM on Contemporary Practices in Census Mapping and Use of GIS 29 May 1 June 2007, New York CENSUS MAPS CENSUS MAPS Data infra-structure improvements - regarding the quality of the streets logical group database with: from sources already available: municipalities commercial firms of street networks Advantages to the Census operation: the identification of the majority of addresses visited by the enumerators GOALS street names building numbers INSTITUTO NACIONAL DE ESTATSTICA Census 2011 Mapping Portuguese Process United Nations EGM on Contemporary Practices in Census Mapping and Use of GIS 29 May 1 June 2007, New York CENSUS MAPS CENSUS MAPS Apart from this, a street network providing addresses would allow : GOALS a comparative analysis of all files used at NSI (as long as they contain an address) the beginning of an infra-structure of greater flexibility in the creation of sample bases INSTITUTO NACIONAL DE ESTATSTICA Census 2011 Mapping Portuguese Process United Nations EGM on Contemporary Practices in Census Mapping and Use of GIS 29 May 1 June 2007, New York CENSUS MAPS CENSUS MAPS NSI should privilege a cooperation strategy with official organizations producing or owning geographical information: for: the acquisition of updated reference cartography of large scale the updating of the Geographical Reference Infrastructure STRATEGY National Mapping Agency Municipal Associations and Municipalities INSTITUTO NACIONAL DE ESTATSTICA Census 2011 Mapping Portuguese Process United Nations EGM on Contemporary Practices in Census Mapping and Use of GIS 29 May 1 June 2007, New York CENSUS MAPS CENSUS MAPS Key procedures adopted by NSI to create the 2011 Census map: METHODOLOGIES The use of official administrative boundaries The use of large scale orthophotomaps to perform the editing process Choosing ArcGis Server to develop a web application to support the editing process Conducting an assessment of the possibility of using external commercial or municipality data to build a network street file INSTITUTO NACIONAL DE ESTATSTICA Census 2011 Mapping Portuguese Process United Nations EGM on Contemporary Practices in Census Mapping and Use of GIS 29 May 1 June 2007, New York CENSUS MAPS CENSUS MAPS In spite of : the need to do the editing and classification work, related to the: METHODOLOGIES Existence of geometrically wrongly positioned arcs Out of date data (digitalization of new arcs) Inexistence or deficient classification of arcs with attribute addresses The technical use of commercial data, as nuclear data for the updating of the geographical reference infra-structure is possible it enables NSI to minimize the effort of digitalization of new arcs and polygons, and increase the availability of address attributes INSTITUTO NACIONAL DE ESTATSTICA Census 2011 Mapping Portuguese Process United Nations EGM on Contemporary Practices in Census Mapping and Use of GIS 29 May 1 June 2007, New York BGRI 2011 building stages: New Administrative Boundaries Reference Data Editing Data Set Streets Network Editing Other Editing Structuring Elements Elements Polygon Creation Process Process BGRI 2011 Reference Data Rules Funcionalities INSTITUTO NACIONAL DE ESTATSTICA Census 2011 Mapping Portuguese Process United Nations EGM on Contemporary Practices in Census Mapping and Use of GIS 29 May 1 June 2007, New York CENSUS MAPS CENSUS MAPS The Codification System in 1991 BGRE and 2001 BGRI uses a numerical sequenciality but does not allow the use of the same code when changes occur to the boundaries of statistical subsections or sections DIFFICULTIES DIFFICULTIES in classifying the statistical subsections of the 2011 BGRI : This codification system is no longer valid Because: the identification system offers two digits while numbering the subsection within the section the definition of a considerable number of new statistical subsections is expected INSTITUTO NACIONAL DE ESTATSTICA Census 2011 Mapping Portuguese Process United Nations EGM on Contemporary Practices in Census Mapping and Use of GIS 29 May 1 June 2007, New York CENSUS MAPS CENSUS MAPS MAINTENANCE OF HISTORY: DIFFICULTIES Census 1991 / Census 2001 made possible by the creation of a Minimum Common Base (BMC) 1991 BGRE BMC 2001 BGRI INSTITUTO NACIONAL DE ESTATSTICA Census 2011 Mapping Portuguese Process United Nations EGM on Contemporary Practices in Census Mapping and Use of GIS 29 May 1 June 2007, New York CENSUS MAPS CENSUS MAPS MAINTENANCE OF HISTORY: PROBLEMS /DIFFICULTIES Census 1991 / Census 2001/ Census 2011 Having a codification system no longer valid and an enlarged dimension of the expected Minimum Common Base the maintenance of history will be guaranteed by the geo- reference of building Census 2011 INSTITUTO NACIONAL DE ESTATSTICA Census 2011 Mapping Portuguese Process United Nations EGM on Contemporary Practices in Census Mapping and Use of GIS 29 May 1 June 2007, New York CENSUS MAPS CENSUS MAPS FINAL NOTES The existing infra-structure of a strictly polygon nature concerning small statistical areas is used for data collection and data dissemination This hierarchy level enables the user to define any superior level This infra-structure is the starting point in the creation of 2011 census maps, a process started by NSI in 2006 INSTITUTO NACIONAL DE ESTATSTICA Census 2011 Mapping Portuguese Process United Nations EGM on Contemporary Practices in Census Mapping and Use of GIS 29 May 1 June 2007, New York CENSUS MAPS CENSUS MAPS FINAL NOTES In order to develop the spatial data infra-structure, NSI decided to assess the costs/benefits of implementing a new component (a street network providing addresses) to perform a new set of activities (apart from Census 2011): the definition of a new 2011 Master Sample the use of administrative files the increasing geocoding of statistical unit files the increasing dissemination of geographical data the preparation of the spatial data infra-structure to enable the transition to a new census model in 2021 INSTITUTO NACIONAL DE ESTATSTICA Census 2011 Mapping Portuguese Process United Nations EGM on Contemporary Practices in Census Mapping and Use of GIS 29 May 1 June 2007, New York THANK YOU FOR YOUR 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