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06/21/2012 Aggregations of spatial information for data dissemination.

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Presentation on theme: "06/21/2012 Aggregations of spatial information for data dissemination."— Presentation transcript:

1 06/21/2012 Aggregations of spatial information for data dissemination

2 SIG IBGE - the map server of the IBGE website New forms of dissemination of statistical data National Spatial Data Infrastructure

3 SIG IBGE - the map server of the IBGE website The channel SIG IBGE - Georeferenced Information System enables users to handle spatial information, navigate on maps, search for and integrate information. Among the available maps one can find: information about the 2010 Census biomes climates endangered fauna agricultural potential terrain soils vegetation localities and densities charts to the millionth scale geodesy geology

4 SIG IBGE

5 SIG IBGE - information about the 2010 CENSUS

6 SIG IBGE

7 The maps in the SIG IBGE channel are also available for visualization in the following formats: KMZ files, for visualization in Google Earth online ArcGIS gallery WMS - web mapping service webservice - use in other web pages download for use in GIS programs

8 New forms of dissemination IBGE is currently implementing two new forms of dissemination of spatial information: by block face through statistical grids

9 Previous situation: enumeration area as the smallest spatial unit area of interest intersection result New forms of dissemination

10 area of interest intersection result New forms of dissemination Query by block face: confidentiality is maintained

11 New forms of dissemination Applications of a query by block face: planning for the creation of teaching establishments study for the conduction of urban construction works environmental studies

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15 ID815959 DOM23 POP85 POP_H32 POP_M53 New forms of dissemination Statistical Grids: hierarchical spatial structures formed by regular cells and used to make aggregated data available

16 New forms of dissemination Statistical Grids: independence from political-administrative boundaries  direct comparability no change over time  direct comparability regular distribution  computing efficiency hierarchical structure  allows multi-scale analyses easily handled with GIS tools vector or raster data structure

17 New forms of dissemination Statistical Grids - Case study: publicly available data from the 2007 Counting permanent private housing units (occupied and closed) in areas classified as rural - type 8 population density obtained from the average number of residents per housing unit in the enumeration area different types of cells 37.5” x 37.5” ~ 1.1 Km  1:2,000 scale 1’15” x 1’15” ~ 2.3 Km  1:4,000 scae 2’30” x 2’30” ~ 4.6 Km  1:8,000 scale Case - Pará

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22 National Spatial Data Infrastructure Panorama of geospatial information in Brazil: Produced/acquired and maintained by public institutions at every government level and by private organizations Users cannot find out:  what is available  where to find information  who maintains the system  how to access data

23 National Spatial Data Infrastructure Solution: INDE was conceived as a solution towards the integrated management of geospatial data and as a means to release information needed in the decision- making process and in the support to social, economic and sustainable development http://www.inde.gov.br

24 National Spatial Data Infrastructure an integrated group of technologies, policies, mechanisms and procedures of management and monitoring, standards and agreements necessary to facilitate and organize the generation, storage, access, sharing, dissemination and use of geospatial data USERS GEOSPATIAL DATA Technology Policies Standards

25 National Spatial Data Infrastructure Web model: SIG Brazil Geoportal UserProducer Searches for metadata; accesses and visualizes data Makes data and metadata available

26 www.ibge.gov.br


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