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

Introduction Background: 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 Outline

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 Introduction Geosciences activities Statistical activities IBGE = + Periodically conducts the Demographic and Agricultural Censuses, as well as Population Counting, according to international recommendations

Background: Census Mapping 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 Census Mapping production was split into two distinct segments 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

Urban Enumeration Area Map

Rural Enumeration Area Map Office update data Field update data

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 2007 Censuses Innovations (1/3) The first time IBGE used the PDA resource in a Census operation

Replacement of traditional questionnaire on paper by  80,000 Personal Digital Assistant - PDA Immediate quality control at the moment of data typing Real time tracking of the data collection in all municipalities, possible by directly transmitting collected data to a central 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  70,000 enumeration areas maps converted to SIRGAS2000 The 2007 Censuses Innovations (2/3) Advantages of PDA

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

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 2010 Census Mapping Project 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

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

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

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

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 2010 Census Mapping Tools

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

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

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) Input Municipalities with less than 20,000 inhabitants (1/4) 1.Training 2.GEOBASE 3.Images inventory 4.Images treatment 5.Selection of Municipalities 6.Beggining of the works on Municipalities WITH images 7.Treatment of Municipalities WITHOUT images Steps

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

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

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 8 th 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

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

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

Orthorectified aerial photos Pirapetinga, MG From Ortophoto

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

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  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 Global Positioning System - GPS Municipalities with less than 20,000 inhabitants (4/4) Municipalities WITHOUT images

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

Data and legacy layer Services layer Integration layer Workflow WFM Geo Web Services Image Server Webservices for legacy OS and documents Geographic DBImages BETBOGCNEFE Sismap: Integration Portal Internet State offices Local offices Headquarter SISCART Data (MGE)

Working environment prototype – Web Service orders Basic legend General tools

Municipal and State Commissions IBGE will establish the Geography and Statistics Municipal Commissions – CMGE and a Geography and Statistics State 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

Our Mission: To portrait Brazil with information necessary to the knowledge of its reality and the exercise of citizenship Luiz Paulo Souto Fortes Directorate of Geosciences