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
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
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
IBGE =
Statistical
activities
+
Geosciences
activities
Periodically conducts the Demographic and Agricultural Censuses,
as well as Population Counting, according to international
recommendations
Background: 2000-2007 Census Mapping
Census Mapping production was split into
two distinct segments
RURAL:
URBAN:
IBGE is the producer of the
topographic maps in 1:25,000
scale or smaller, together with
the Army Geographical
Service Directorate
Public state and municipal
institutions and the private
sector produce cadastral maps
at the 1:2,000 to 1:10,000
scales
IBGE produces the
basic input for generating
rural maps in support of
the Census Mapping
IBGE does NOT produce
the input for urban maps
in support of the Census
Mapping
2000-2007 Urban Enumeration Area Map
2000-2007 Rural Enumeration Area Map
Field update data
Office update data
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
The 2007 Censuses Innovations (2/3)
Advantages of PDA
• 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 (3/3)
PDA screen
showing Rural Map
in JPG format for
Census interviewer
location
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
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
CNEFE
2010 Census Rural Maps
Municipal Maps
(with 2007 collected points)
Rural maps
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
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
2010 Census Mapping Production
Legislation revision/
Census Mapping
and limits
representation
Municipality
> 20.000 inhab
Urban base to be
acquired and rural
base to be produced
on IBGE state units
PRODUCTION ON SISMAP
Municipality
< 20.000 inhab
Census enumeration
areas edition on IBGE
agencies and link with
CNEFE
Enumeration Area
Map in paper
Enumeration Area
Map in digital form
(PDA and desktop)
Census
enumeration areas
in digital form
Base for results
dissemination
2010 Census Mapping Update
Municipalities with less than
20.000 inhabitants
Total of 4002 and 58,442
enumeration
areas
MUNICÍPIOS
ATÉ 20 MIL HABITANTES
Total: 4.002
Total de setores: 58.442
Setores (1,2,3,4): 25.457
Municipalities with more
than 20.000 inhabitants
Total of 1562 and 190,626
enumeration areas with the
acquisition of cadastre bases
from Mapping companies
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
1.
2.
3.
4.
5.
6.
7.
Training
GEOBASE
Images inventory
Images treatment
Selection of Municipalities
Beggining of the works on Municipalities WITH images
Treatment of Municipalities WITHOUT images
Municipalities with less than 20,000 inhabitants (2/4)
Geometry adjustment of Enumeration Areas and
Municipalities boundaries using satellite images and
orthophotos
Orbital images from ALOS satellite
Orbital imagens from Google Earth
Orbital images from Quickbird
Orthorectified aerial photos
Orbital images from Google Earth
Marechal Thaumaturgo - AC
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 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
Orbital images from ALOS satellite (2/2)
Porto Estrela - MT
From ALOS
Orbital images from Quickbird satellite
Inserir imagem quickbird
Santo Antônio do Leverger, MS
From Quickbird
Orthorectified aerial photos
Pirapetinga, MG
From Ortophoto
Municipalities with less than 20,000 inhabitants (3/4)
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
Municipalities with more than 20,000 inhabitants
1562 Municipalities - acquisition of urban vector bases from Mapping
companies
Local
offices
Headquarter
State offices
Internet
Integration
layer
Services
layer
Sismap: Integration Portal
SISCART
Workflow
WFM
Geo Web
Services
OS and
documents
Geographic DB
Image
Server
Webservices
for legacy
Data and
legacy layer
Data (MGE)
Images
BET
BOG
CNEFE
Working environment prototype – Web
General tools
Basic legend
Service orders
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
www.ibge.gov.br
Luiz Paulo Souto Fortes
Directorate of Geosciences
luiz.fortes@ibge.gov.br