06/21/2012

Aggregations of spatial information for data dissemination

Aggregations of spatial information for data dissemination

• SIG IBGE - the map server of the IBGE website

• New forms of dissemination of statistical data

• National Spatial Data Infrastructure

SIG IBGE - the map server of the IBGE websiteThe 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

SIG IBGE

SIG IBGE - information about the 2010 CENSUS

SIG IBGE

SIG IBGEThe 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

Previous situation:•enumeration area as the smallest spatial unit

area of interest

intersection result

New forms of dissemination

area of interest

intersection result

New forms of dissemination

Query by block face:•confidentiality is maintained

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

ID 815959

DOM 23

POP 85

POP_H 32

POP_M 53

New forms of dissemination

Statistical Grids:•hierarchical spatial structures formed by regular cells and used to make aggregated data available

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

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

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 availablewhere to find informationwho maintains the systemhow to access data

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

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

National Spatial Data Infrastructure

Web model:

SIG Brazil

Geoportal

User Producer

Searches for metadata; accesses

and visualizes

data

Makes data and metadata available

www.ibge.gov.br