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Integration of satellite/aerial images and GPS for field work

Integration of satellite/aerial images and GPS for field work. Luiz Paulo Souto Fortes, PhD Directorate of Geosciences Taller Regional Sobre Cartografía Censal con Miras a la Ronda de Censos 2010 en Latinoamérica Santiago, Chile, November 24-27, 2008. Outline. Introduction

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Integration of satellite/aerial images and GPS for field work

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  1. Integration of satellite/aerial images and GPS for field work Luiz Paulo Souto Fortes, PhD Directorate of Geosciences Taller Regional Sobre Cartografía Censal con Miras a la Ronda de Censos 2010 en Latinoamérica Santiago, Chile, November 24-27, 2008

  2. Outline • Introduction • Background: 2000-2007 Census Mapping • The 2007 Censuses Innovations • 2010 Census Mapping Project • 2010 Census Mapping Tools • Municipalities with less than 20,000 inhabitants • Municipalities with more than 20,000 inhabitants • Municipal and State Commissions

  3. Statistical activities Geosciences activities IBGE = + Introduction • IBGE is a Federal Government institution in Brazil responsible for producing, analyzing and disseminating statistical information (demographic, economic and social), as well as geodetic, cartographic, geographic , natural resources and environmental information •  Optimization of resources and maximization of quality • Periodically conducts the Demographic and Agricultural Censuses, as well as Population Counting, according to international recommendations

  4. Background: 2000-2007 Census Mapping Census Mapping production was split into two distinct segments • RURAL: • IBGE is the producer of the topographic maps in 1:25,000 scale or smaller, together with the Army Geographical Service Directorate IBGE produces the basic input for generating rural maps in support of the Census Mapping • URBAN: • Public state and municipal institutions and the private sector produce cadastral maps at the 1:2,000 to 1:10,000 scales IBGE does NOT produce the input for urban maps in support of the Census Mapping

  5. 2000-2007 Urban Enumeration Area Map

  6. Field update data Office update data 2000-2007 Rural Enumeration Area Map

  7. The 2007 Censuses Innovations (1/3) • National Address File for Statistical Purposes – CNEFE • Prepared from records of units surveyed in 2000 • This file aims to improve the survey, treatment and dissemination of statistical information • In the rural area, the geographical coordinates necessary to geocoding rural properties were collected, as well as on health and education establishments • Replacement of the traditional questionnaire on paper by a Personal Digital Assistant – PDA The first time IBGE used the PDA resource in a Census operation

  8. The 2007 Censuses Innovations (2/3) Advantages of PDA • Replacement of traditional questionnaire on paper by  80,000Personal Digital Assistant - PDA • Immediate quality controlat the moment of data typing • Real time tracking of the data collection in all municipalities, possible by directly transmitting collected data to acentral system • Location of the units surveyed in rural areas (agricultural, health and education establishments), since the PDAs are equipped with a GPS receiver • Update in the field with the use of GPS •  70,000enumeration areas maps converted to SIRGAS2000

  9. The 2007 Censuses Innovations (3/3) PDA screen showing Rural Map in JPG format for Census interviewer location

  10. 2010 Census Mapping Project For the 2010 Census, an unique Census Mapping Project that integrates Municipalities’ urban and rural areas is being developed, changing from the hybrid analog/digital format to a full digital format using modern technological resources (strongly based on imagery) Main Objective Building of an integrated Territorial Database in support of the 2010 census operations, from the planning to the collection and dissemination phase • Specific Objectives • Associate the CNEFE file to the blocks and block-face of 2007 urban enumeration areas • Geometrically adjust the urban and rural limits for each Municipality

  11. CNEFE 2010 Census Urban Maps • Use of maps on PDA with GPS • Click on block/block face • Open address list • Click on address • Open questionnaire Urban maps

  12. 2010 Census Rural Maps Municipal Maps (with 2007 collected points) Rural maps

  13. Evolution of municipal enumeration areas file 2007 rural enumeration area file with urban enumeration areas without integration 2010 rural enumeration area file integrated to urban enumeration areas

  14. 2010 Census Mapping Tools GEOBASE - Software developed by IBGE that allows the adjustment of graphic shapefiles to the field existing features, represented on the images covering the Municipalities SISMAP - System under development by contract, aiming the production of Municipalities mapping from a single continuous spatial database, that will be created with input data from GEOBASE and other sources of vector and imagery data

  15. 2010 Census Mapping Production PRODUCTION ON SISMAP Enumeration Area Map in paper Census enumeration areas edition on IBGE agencies and link with CNEFE Municipality < 20.000 inhab Enumeration Area Map in digital form (PDA and desktop) Legislation revision/ Census Mapping and limits representation Census enumeration areas in digital form Urban base to be acquired and rural base to be produced on IBGE state units Municipality > 20.000 inhab Base for results dissemination

  16. 2010 Census Mapping Update Municipalities with less than 20.000 inhabitants Total of 4002 and 58,442 enumeration areas Municipalities with more than 20.000 inhabitants Total of 1562 and 190,626 enumeration areas with the acquisition of cadastre bases from Mapping companies

  17. Municipalities with less than 20,000 inhabitants (1/4) Input • Digital limits file (municipal and intra municipal) • 2007 CNEFE addresses files • Images (Google, ALOS, Quickbird, orthophoto) • BET – Municipalities Database (limits, legislation, etc) • BOG – Enumeration Areas Database (descriptions, etc) Steps • Training • GEOBASE • Images inventory • Images treatment • Selection of Municipalities • Beggining of the works on Municipalities WITH images • Treatment of Municipalities WITHOUT images

  18. Orbital imagens from Google Earth Orbital images from Quickbird Orthorectified aerial photos Orbital images from ALOS satellite Municipalities with less than 20,000 inhabitants (2/4) Geometry adjustment of Enumeration Areas and Municipalities boundaries using satellite images and orthophotos

  19. Orbital images from Google Earth Marechal Thaumaturgo - AC From Google Earth

  20. Orbital images from ALOS satellite (1/2) • Optical and radar images generated by the ALOS (Advanced Land Observing Satellite) Japanese satellite show to be promising • Resolution of the 8th United Nations Regional Cartographic Conference for the Americas recommended the adoption of satellite data dissemination policies at reduced cost, as the ones practiced by the ALOS mission • IBGE established a partnership with the University of Alaska, ALOS data distribution node for the Americas, to be responsible for the distribution to non-commercial users in Brazil and in South America  IBGE has low-cost access to the satellite images, whose resolution may vary from 100 to only 2.5 meters

  21. Orbital images from ALOS satellite (2/2) Porto Estrela - MT From ALOS

  22. Orbital images from Quickbird satellite Inserir imagem quickbird Santo Antônio do Leverger, MS From Quickbird

  23. Orthorectified aerial photos Pirapetinga, MG From Ortophoto

  24. Municipalities with less than 20,000 inhabitants (3/4)

  25. Municipalities with less than 20,000 inhabitants (4/4) Municipalities WITHOUT images Global Positioning System - GPS IBGE - MOBILE GIS Software acquired by IBGE and customized to fulfill the Censuses 2007 demands. New functionalities implemented to aid the processes of Census Mapping for Census 2010. • Determines the best track for the survey • Establishes routes and waypoints • Transfers the saved files on PDA to the computer to be dealt with by GEOBASE

  26. Municipalities with more than 20,000 inhabitants 1562 Municipalities - acquisition of urban vector bases from Mapping companies

  27. Local offices Internet State offices Headquarter Sismap: Integration Portal Integration layer SISCART Workflow WFM Geo Web Services Image Server Webservices for legacy Services layer Data and legacy layer Geographic DB Images BET BOG CNEFE Data (MGE) OS and documents

  28. Working environment prototype – Web General tools Basic legend Service orders

  29. Municipal and State Commissions • IBGE will establish the Geography and StatisticsMunicipal Commissions – CMGE and a Geography and StatisticsState Commissions – CEGE in each municipality and state before starting the statistical data collection in the 2010 Census • Aim to integrate the efforts of different segments in society to ensure the quality of the Census operation • The members of CMGE and CEGE, along with representatives from IBGE, are from the executive, legislative and justice powers of the municipality and state, and from local civil organizations that may somehow cooperate • The first CMGE and CEGE activities consist in assessing the consistency of the information contained in the Census Mapping, when the local participants could provide valuable contributions for improving these maps

  30. Our Mission: To portrait Brazil with information necessary to the knowledge of its reality and the exercise of citizenship www.ibge.gov.br Luiz Paulo Souto Fortes Directorate of Geosciences luiz.fortes@ibge.gov.br

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