Symposium 2001/07 6 July 2001 English only |
Symposium on Global Review of 2000 Round
of
Population and Housing Censuses:
Mid-Decade Assessment and Future Prospects
Statistics
Division
Department of
Economic and Social Affairs
United Nations
Secretariat
New York, 7-10
August 2001
Maintaining census-related activities
during intercensal years*
N. Rama Rao **
CONTENTS
1. Census publications and
electronic products
3. Methodological and in-depth
studies
5. Monitoring jurisdictional
changes
6. Staff for intercensal
activities
7. Storing and maintaining
census data in Geographic Information System (GIS)
9. New trends in databases and
dissemination
11. Preservation of census
records
12. Archiving of census
activities
Maintaining Census-Related Activities during Intercensal
Years
Intercensal activities lend continuity to census operations and contribute towards an effective and efficient programme for the next census. Countries benefit from maintaining a permanent census organization, even if it is on a modest scale. A nucleus office with essential professional and technical staff and equipment procured for the census helps to ensure that institutional memory is preserved and census materials and activities are archived for future use. Without such continuity, each new census has to be planned afresh, leading to waste of time and resources.
A
wide range of tasks must be performed between censuses, from dissemination of
results and working with data users to producing analytical reports and
carrying out surveys and methodological studies. In addition, maps require
continuous updating, a sampling frame must be maintained, and important records
must be preserved. A goal of a census is to produce data that are useful to
users, so timely publication and dissemination of census data are of paramount
importance. In some countries with a large volume of data, the printing of
reports may occupy nearly the entire intercensal period. Many publications are
now available electronically, which can shorten production time, but printed
reports are still important in census dissemination.
Census
organizations work with demographic research organizations, specialized
ministries and university departments to produce analytical reports on special
topics and methodological studies. Such work can shed light on topics of
current interest to the nation, such as village-level poverty and disparities
in sex ratios. Methodological studies help to ensure that census concepts and
definitions are appropriate; that census topics are relevant; that
questionnaires are well designed; and that difficulties encountered in one
census are not repeated in the next census.
An
important intercensal activity is working with data users to ensure that census
data are widely available for use. Customers include universities, banks, large
companies, government departments, researchers and students. Some unpublished
data could be supplied to data users for a fee, which would help to sustain
intercensal activities. The census office needs to maintain a library with all
published reports and electronic products, and it should distribute census
publications to libraries throughout the country. A communication strategy
during the intercensal period maintains awareness of the importance of the
census and helps to ensure cooperation during the next census. For example,
popular versions of census reports could be issued to make census results more
understandable to the general public.
Storing
census data in a computerized database is now becoming possible in developing
countries, thanks to rapid progress made in computer technology and the
affordability of microcomputers. It is useful to store data at the
enumeration-area level so that data can then be aggregated for larger
administrative units. Small units are also necessary for establishing a
sampling frame. Continuous updating must be done whenever new information is
available. When databases are user-accessible, special attention must be paid
to maintaining confidentiality of individual records. The Internet is a
valuable tool for data dissemination. It allows text, graphs, tables and maps
to be sent to data users anywhere in the world. Intercensal staff are needed to
maintain the web site and to provide a list of publications available.
A
final task during the intercensal period is the preservation and archiving of
census records. An enormous volume of material is produced during the course of
conducting a census, and essential maps and records must be kept for use in
planning future censuses. Administrative reports serve as institutional memory
by providing basic and required documentation of all census activities. Copies
of specimen forms, instructions, maps, publicity materials and important
correspondence should be preserved and plans made for ready access to them as
needed.
1.
With the completion of data processing and dissemination of main census
results the focus of the census organization generally shifts to intercensal
activities such as (1) printing of publications and distributing them
along with electronic products (e.g,. CD‑ROMs) among data users; (2) production
of analytical or in-depth reports; (3) completing dissemination of all census
data; (4) meeting demands for additional data; (5) maintaining a data users
service centre; (6) carrying out surveys and methodological studies; (7)
continuously updating jurisdictional changes; and (8) preservation of important
census records and census frame.
2.
In advanced countries, (e.g., the United States of America, the United
Kingdom and Japan) and countries having a permanent census organization, the
intercensal activities mentioned above are already carried out. This paper
addresses itself mainly to those nations where there is no permanent and
continuous census organization. However, countries with permanent census
organizations could also review their intercensal activities in the light of
the suggestions made.
3.
At the outset it is emphasized that there is a need for a permanent
census organization in every country, even if it is on a modest scale. This will
go a long way in maintaining institutional memory and archiving census
activities after a census is over. It is true that all countries may not be
able to afford a census office on a continuous basis during the intercensal
period. It is suggested that at least a nucleus office should be maintained
retaining essential professional and technical staff and equipment
procured for the census.
4.
Having a permanent census organization or a census cell as part of the
national statistical system has a distinct advantage. It avoids the “phoenix”
approach to census taking—that is, opening a census office prior to each
census and disbanding it soon after the census, only to have it reappear at the
beginning of the next census operations a decade later. Such an approach
involves enormous time and wastes human resources created with great effort and
equipment bought at exorbitant cost. In such a situation, the next census has
to be planned afresh from the very beginning without any linkage with the past.
5.
Developing countries that depend on financial aid from international
agencies to conduct a census seek fresh technical assistance also at every
census. This is because their professionally trained staff leave to join other
organizations in the absence of a permanent census office. An international
technical adviser who arrives in such a country to conduct a census generally
finds no trace of the previous census except for a few publications released
before the departure of the previous technical adviser. The argument put
forward by such countries while seeking fresh technical assistance for
conducting a census—for the second or third time—is that there is no one in
their office with census experience and background.
6.
The absence of a continuous census organization also results in
underutilization of census data. As there is no single authority to preserve
such data and help retrieve them, census information is not at all utilized
fully by national agencies for whom it is mainly intended. It is underlined
that there is a need to create awareness among national users at all levels
from government ministers and secretaries down to the grass-roots level about
census data and their usefulness to them. This involves not only publication of
data but also systematic training in using these data. This calls for
continuous supervision by trained national staff familiar with both the
availability and utility of data.
7.
With this general background of the need for a permanent census
establishment, we may consider each of the census-related activities during the
intercensal years in greater detail.
8.
The success of a census is achieved not only by satisfactory completion
of fieldwork, but also by the availability of all data to government and other
users. Timely publication and dissemination of all census data is of
paramount importance. Though computerization helps in the production of data
through CD-ROMs and other electronic products, printed reports still occupy an important
place in dissemination of data. When the publication programme is fairly large
and there are many volumes of tables (as in the case of large countries), the
printing of census reports may spill over into the intercensal period.
Criticism has been levelled against some countries that census publications
were released one by one until the next
census. Such delays in publication can reduce the usefulness of data produced
by an expensive and difficult operation. Hence, though a publication programme may
be undertaken during the intercensal period, it should not occupy the entire
period between two censuses.
9.
The census is a vast source of demographic, social, economic and
cultural data. Government departments use these data extensively for planning
and evaluating their development plans, programmes and policies. Apart from
government, census data are useful to research organizations, university
departments, demographic research institutions, non-governmental organizations
and a host of other national and international organizations and scholars
concerned with population issues. To ensure the fullest use of the wide range
of census data, the census organization should publish additional tables and
analytical reports on topics of current interest relating to population. Some
of these reports could be based on collaborative research with institutions or
individual researchers concerned. This is yet another important activity during
the intercensal period. For instance, if there are wide variations in sex ratio
between regions within a country, research could be undertaken using the census
data to find out the causes and consequences of disparities in sex ratio. It
would be interesting and instructive to know the extent to which underenumeration
of women or men (as the case may be) in the census is responsible for such
disparities. In respect of developing countries, socio-economic indicators
based on census information could be generated for villages, which will enable
analysis of the poverty situation. Generally, detailed village-level data are
released last and village-level analysis may fall under the purview of
intercensal staff.
10.
To undertake analytical studies, an analysis and research division
should function in the census unit during the intercensal period. This division
could undertake analysis and interpretation of census results and carry out
methodological studies that are also useful for the subsequent census. This
will enable the census to play an important role in the national statistical
system and sharpen the skills of the census professional staff. It may be
necessary to check during the intercensal period whether any change is
necessary in the urban-rural classification of areas, in the light of the
latest census figures.
11.
As an example, in Cambodia, no satisfactory definition of "urban
areas" exists. Headquarters of districts in 21 provinces are considered
urban, and the remaining three provinces are treated as wholly urban. This is
an administrative decision made without any demographic basis. With the
availability of the 1998 census data it is proposed to undertake during the
intercensal period the question of redefining urban areas and evolving a fresh
list of urban areas based on demographic considerations.
12.
During the intercensal period census data should be analysed in
combination with relevant data from other sources to provide useful guidelines
to the government on population issues and policies. The census office may have
to collaborate with individual scholars or specialized institutions in such
analysis.
13.
The intercensal period could also be best used for conducting
methodological studies relating to census operations taking into account past
experience and the data requirements of the national governments. For instance,
the questionnaire could be improved in its design; the decision to improve or
reduce precoding in the census questionnaire could be made based on experience
in the previous censuses; methods could be devised to reduce underenumeration,
especially in urban areas; and methods could be developed to enumerate
satisfactorily visitors to households and the homeless and nomadic population,
who are likely to be omitted in the census.
14.
Such experience was useful, for instance, in the Gambia. The 1993
census was conducted on a de facto basis and the following procedure was
adopted in filling in the census questionnaire: Part 1 contained the names
of persons found in a household on the reference date. Sex, age and
relationship to head were filled in by the enumerator for all households in
his/her Enumeration Area (EA) during a first visit. This was followed by a
second round of visits to all households in the EA to fill in other census information
for the persons already listed. This was done to ensure that all persons
eligible for enumeration are first listed as close to the reference day as
possible. However, in practice a problem arose. A few persons were not
available to give information during the second visit of the enumerator. It
would be necessary to examine during the intercensal period whether this method
of enumeration should continue or not in the next census.
15.
Research could also be carried out as to how to improve field control and
the tabulation plan. A record of the results of such methodological studies
should be carefully documented. This record of experience will help in planning
the next census for the country concerned.
16.
It has been observed that during the preparatory stages of a census,
demands are made by some sectors of the population to ask some questions that
could not be included in that census due to certain reasons. For instance,
prior to the 2001 census of India there was a demand for caste enumeration. In
Cambodia there was a demand to include a question on nationality in the 1998
census. The respective government could not accept all these demands. Such
issues could be discussed and analysed in a larger forum during the intercensal
period without the pressure of deadlines, and a decision could be made for the
next census.
17.
An in-depth study of concepts and definitions used in the previous
censuses, examination of relevance of some topics already included, addition of
new topics, or exclusion of old topics in the next census could also be done.
For instance, there is a view that questions on religion and mother tongue need
not be included in every census by a country that is regularly conducting a
census. As regards data collection on literacy, there is an opinion that before
accepting the answer "Yes" to a census question on literacy, the
informant should be practically tested by being asked to read or write a few
lines. This may pose a time constraint in enumeration. Such issues could be
carefully examined during the intercensal period so as to make a decision for
the future census. Costing studies could be undertaken to reduce the census
cost by restructuring staffing and rationalizing census practices.
18.
The uniqueness of the census lies in its capability to produce
statistics for small areas. During the intercensal period the demand for
small-area data has to be met using computers. Census newsletters should be
published periodically to provide the latest information on census operations,
reports and products. User guides may be brought out by the intercensal staff
to provide information on the use of the material produced by the census.
Unpublished tables could be released to data users on payment. Revenue from
such services rendered as well as from the sale of census publications and
CD-ROMs could be used to sustain the census office and the data users service
centre during the intercensal period.
19.
Generally census EAs are formed in such a way that they do not cut
across village boundaries. This enables aggregation of census data at the
village level. The UN principles and recommendations for population and housing
censuses (United Nations, 1998) has recommended that in the course of the
census, enumerators could also be instructed to collect general information
about each village, including information about available services and
facilities. This will help generate a village-level data base, very useful for
development planning. This database may be updated during the intercensal
period by the census office.
20.
A data users service centre should form an integral part of the census
office during the intercensal period. Its staff may have to deal with a wide
range of customers, including ministries and government departments,
universities, banks, large companies, and individuals like members of
Parliament, researchers and students. The staff should therefore be
suitably chosen to handle this work. If a data user wants a small amount of
information (like the population of a village or district) it should be given
immediately. Regarding publications, necessary guidance should be provided to
the users as to where they are available for purchase or reference.
21.
Libraries play an important role in the dissemination of published
census reports. A census office library has to be maintained by the intercensal
staff. It should hold all published reports and census electronic products. It
is also necessary for the staff to ensure that census publications are
available in leading libraries (including provincial libraries).
22.
In those countries where computerized census data are available,
commercial organizations specializing in services could be developed. Census
agencies could enter into an agreement with the census office to obtain
census data on diskettes or CD-ROMs. Agencies could supply census data or
census-derived data to any customer and could pay a fee to the census office
for each sale. Such agencies are functioning successfully in the United
Kingdom; they approach the Office of the Population Censuses and Surveys (OPCS)
in London for data. The intercensal staff oversees these arrangements.
23.
There is a need to develop a comprehensive post-census communication
strategy. Apart from the publication of general census reports, tables and
research monographs, simpler and more target-oriented reports or illustrated
folders should be brought out during the intercensal period. Popular versions
of census reports would make census results easily understood by the general
public.
24.
The intercensal staff should be encouraged to attend census and
demographic workshops (in-country and international) and training courses. This
will help in continuous national capacity-building and keeping the staff
informed of the latest developments in census methodology and use of census data.
25.
During the intercensal period maps have to be not only maintained but
also updated. It is necessary to monitor jurisdictional changes made by the
government from time to time so as to effect the changes in the maps and
records for use in the next census. Changes in the boundaries of districts,
communes, villages and EAs are currently updated manually. Such a process is
time-consuming and is prone to errors. These maps should be digitized and
changes effected through computer. This is yet another important activity
during the intercensal period. If not done during this time, the preparation of
a fresh list of administrative areas and EAs has to be undertaken before the
next census within a limited time, which may lead to administrative problems
and omission of areas.
26.
Once data processing, tabulation and release of major census results
are over, the census office will have depleted staff strength due to termination
of temporary staff appointed during census time. The need for a permanent
census establishment has been suggested earlier. It would be appropriate to
retain at least a skeleton staff of the divisions dealing with the census
planning and implementation, data processing, and analysis and research to work
in the data users service centre and analysis and research division. There
should be a technical advisory committee that should examine requests from data
users for additional tabulations and also recommend in-depth analysis of census
data in combination with other demographic data available. If suitable staff
are not available within the census office for analysis of certain topics, the
committee can entrust the studies to outside agencies.
27.
In the developed countries a computerized database exists, but
developing countries have not been in a position to afford this in the past.
Thanks to the rapid strides made in computer technology and the consequent
affordability of microcomputers, the development of such databases is now
possible in most of the developing countries as well. It is useful to store
census data by EAs, which can then be aggregated to obtain data on larger administrative
units, such as districts, provinces or country. Storing data in small-area
units is also useful for maintaining a sampling frame.
28.
Once the GIS is available with census data integrated into it,
continuous updating must be done whenever new information is available. During
the intercensal period, it is necessary to update GIS with information from
other sources of data. Updating the GIS is possible only with coordination and
cooperation among the different data-collecting agencies. The staff in the
census unit during the intercensal period should verify the accuracy of the
incoming data before entering them into the system.
29.
Missing information has to be imputed with care in consultation with
the agency concerned. The staff should carefully document the sources of data,
reference period and evaluation, if possible.
30.
During the intercensal period, there should be easy accessibility to
data. A continuous monitoring and improvement of this aspect is necessary. Data
requirements will vary from agency to agency. For the purpose of planning for
development, statistics on totals, rates and ratios for small areas are needed.
Published tables may not be sufficient for researchers. They may require more
data from individual records. In this situation the issue of confidentiality of
census information has to be taken into account carefully when supplying data
to any user. The data can be presented in user‑accessible databases
storing the information. During the intercensal period users should be
continuously trained on how to utilize census data. This will help in
sensitizing the public on the census and its uses. Ultimately this will be
useful in getting public cooperation for the subsequent census as well, since
the census will be in the mind of the people as a major source of population
data.
31.
During the intercensal period population and household surveys could be
conducted which will help update demographic and social indicators. To cite an
example, after the 1961 census the Office of the Registrar General and Census
Commissioner of India in collaboration with its regional officers in the states
and union territories executed a number of intercensal projects. There was a
plethora of census publications on a variety of topics that were welcomed by
the expert and layman alike. They included socio-economic surveys of villages
and towns, district census handbooks including village and town directories,
ethnographic studies, census atlases and several special studies (for example,
handicrafts, fairs and festivals). These studies were carried out by nucleus
census offices at central and state levels using the census database and
supplementing it by separate in-depth studies. They proved very useful to the
central and state governments and researchers. They were followed up by further
research and publications by international institutions.
32.
These studies infused a “flesh and blood account” of people’s lives,
customs and manners to the “dry bones” of census statistics. Such intercensal
programmes are recommended for census offices. They may not be highly technical
but they serve the useful purpose of documenting the census statistics and
socio-economic and cultural life of the people. If repeated at the next census,
such studies could throw light on changes over time.
33.
Developing countries are now trying to adopt the innovative methods of
storage of census data, databases and dissemination implemented by more
technologically advanced countries. As the following review shows, it is
necessary for intercensal staff in these countries to be in position to
successfully adopt new methods that are likely to be suitable and beneficial to
their countries. The data storage situation has now changed phenomenally. The
CD-ROM has emerged as a popular medium of storage and it is highly suitable for
dissemination.
34.
One of the efficient dissemination tools for population data in modern
times is the Internet. Text, graphs, tables, maps and so forth can be sent
through the Internet to data users anywhere in the world.
35.
The intercensal staff have a role to play in web-page design, products
and services. The main aim of the census office web site should be to provide
an up-to-date supply of population data. Several papers may be designed to
present to the data user the range of products available from the census
office. This may include a list of publications and information relating to how
to obtain copies as well as sample outputs. There should also be a page
allocated to announce new or recent releases. The intercensal staff may
also try to provide links to web sites of other statistical service providers.
36.
Cambodia provides an example of a developing country’s efforts to
produce electronic dissemination products and to maintain them during the
intercensal period. Due to war and internal disturbances for more than three
decades Cambodia could not conduct its first census in 36 years until 1998.
UNFPA provided necessary financial and technical assistance for the census. The
census project was intended to develop national capacity for producing reliable
demographic data and to assist the government in conducting a national
population census. The census was conducted successfully and data processing
completed by the middle of 1999.
37.
At the first stage a number of priority tables were released. These
tables were analysed by trained national staff under the guidance of experts,
in special in-country workshops. Analytical reports on each topic (e.g.,
fertility, migration and population projections) were printed and published.
38.
A data user service centre has been established within the census
office, where trained staff meet the requests of data users. Four CD‑ROMs
(See Annex 1) have been prepared by the census project. Several seminars for
presentation of census results and workshops to train planners in ministries
and other data users were conducted from time to time. Such seminars were
also held in every province by census office staff. Census data dissemination
workshops were conducted in 24 provinces of Cambodia from September 2000 to
March 2001.
39.
The purpose of these workshops was to provide census data to planners,
administrators and researchers at province, district and commune levels. In a
country like Cambodia where the general educational level is fairly low,
special efforts have to be made to train planners and the public on census
statistics and their use. A team of trained staff from the census office went
around to the provinces to explain (through Power-Point presentation) to the
participants the data produced by the census in the form of reports and
electronic media. The participants were also educated on the use of census data
in each sector of development. An opportunity was provided to planners at the
grass-roots level to have hands-on experience on the computer with census data
and census thematic maps. They were also told about the consequences of
population growth and the need for proper planning to strike a balance between
population and development. These workshops were very successful and
participants evinced great interest and enthusiasm in applying these data in
their work. They desired to attend more such workshops. During the
intercensal period this activity is being continued, and results from the
Demographic and Health Survey (DHS) and the latest socio-economic surveys are
combined with census data in the presentation.
40.
The census office has developed a web site with census background
information and key census results. A team of census office staff, trained in
web-site design, HTML and JAVASCRIPT programming, will be updating the web site
during the intercensal period with the help of the latest available data from
surveys.
41.
The census provides the frame required for sampling purposes. The set
of enumeration areas developed in the most recent population census is a
typical area frame. Such an area frame generally contains information like the
census count of persons or households in each area, which can be used to
establish the probabilities of selecting the first-stage sampling units. It is
necessary to update this frame during the intercensal period. The 1998
census of Cambodia served as the frame for designing a master sample for use in
intercensal household survey programmes. It was used for the Cambodia DHS in
2000 and several other studies.
42.
Publications, CD-ROMs and other electronic data products of the census
have to be preserved and maintained during the intercensal period. The census
office should provide special facilities for their preservation by allotting
suitable space in an air-conditioned facility with proper security. This is
very important; otherwise these products could be lost and not available for
future reference.
43.
The enormous volume of paperwork during the census creates a huge
volume of maps and records. It is necessary to keep the essential maps and
records useful for the future, while destroying working sheets, redundant
records, unused forms and control sheets.
44.
In modern times space for archiving has to be procured at great cost.
Stacking equipment is also expensive. Hence senior officers of the census
office should form a committee to decide which records are essential and need
to be retained (specifying the date up to which they should be retained) and
which are to be destroyed soon after the census.
45.
Maps and census documents such as census questionnaires are all
confidential records and hence their safety and security have to be ensured. In
countries where the information collected through the census questionnaire has
been entered fully in the computer, the filled-in census questionnaire could be
destroyed after data processing. If 100 per cent of the data was not
entered, the filled-in questionnaires may be retained until the next census.
The location of census records need not necessarily be at the main census
office which may be in the capital city or town. Taking into account the high
cost of renting warehouses in such places, the census records could be retained
in neighbouring towns or villages with proper security arrangements.
46.
Generally an administrative report is written after the census by the
project management incorporating in it the census methodology. This is of great
use in the subsequent census. In India, for instance, such reports both at
central and state levels are available for almost every census in the past.
Such administrative reports serve as invaluable documents of historical value.
An administrative report should contain all details: description of how
concepts were developed, procedures adopted to enumerate the population,
staffing pattern and organizational problems that cropped up and how they were
solved. This report should also have copies of instructions, census
questionnaires, tabulation plan, data-processing system and publication
programme.
47.
In addition to the administrative report it is necessary to keep copies
of all important internal circulars containing instructions, specimen forms
prescribed to monitor and control the census, publicity material and important
correspondence with field agencies. All these will serve as useful reference
material in successive censuses. For permanent reference, it would be desirable
to store the administrative report and the documents mentioned on CD-ROMs.
48.
Intercensal activities lend a continuity to census operations and
contribute towards an effective and efficient programme for the next census.
The main intercensal activities are: (1) completion of dissemination; (2)
completion of printing and publication; (3) provision of services to data
users; (4) continuous updating of jurisdictional changes as an advance
preparation for the next census; (5) carrying out population surveys, household
surveys and methodological studies; (6) maintenance of a census library
containing census publications and electronic products (e.g., CD-ROMs); (7)
preservation of essential maps and records and destroying filled-in
questionnaires after data processing under proper supervision if data have been
entered fully; (8) documenting census activities in administrative reports and
retaining multiple copies of all essential census instructions, circulars and
questionnaires for reference and guidance in the next census; (9) continuously
updating digitized maps for use in the next census; (10) retaining the
census office (at least in a skeleton form with necessary staff) during the
intercensal period; and (11) updating the census frame for the purpose of
sampling.
49.
Intercensal activities provide a smooth transition from one census to
another and optimise data utilization. They serve as an important link between
the censuses. They need as much attention and careful planning by census
management as the main census itself. Above all they help retain and improve
national capacity built at a great cost and with external technical assistance
in some cases.
Cambodia, National
Institute of Statistics (2001). Organisation
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(1996). Proposed changes in the International Recommendations for Population
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(1992). Handbook of Population and Housing
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Organization and Administration of Population and Housing Censuses. Studies
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CD-ROMS
CONTAINING 1998 CENSUS DATA OF CAMBODIA THAT ARE BEING DISSEMINATED AND UTILIZED DURING THE INTERCENSAL PERIOD
CD-ROM #1
50.
Census Priority
Tables. This CD was released in September 1999. It contains table sets
consisting of 50 priority tables at the following geographical levels: Country
(Total, Urban and Rural), 24 Provinces (Total, Urban and Rural) and 180
Districts. In all, there are 11,513 census tables on the CD-ROM. These tables
cover the general population aspects like sex, age, marital status and
relationship to head of household, education, economic activity, migration,
fertility and household amenities. A user-friendly "Table Retrieval
System" is also included to facilitate easy retrieval of selected tables
among the large number available.
CD-ROM #2
51.
Village Databases. In
an effort to meet frequent demands from data users for small-area statistics,
the National Institute of Statistics of the Ministry of Planning released a
CD-ROM with aggregated data for every village enumerated in the country. Since
confidentiality of census data must be maintained, especially at these low
geographical levels, it was only possible to aggregate part of the census
variables, i.e., age, sex, relationship, marital status, literacy, school
attendance, educational attainment (in categories) and housing amenities.
52.
This dissemination was intended for data users with good knowledge of
microcomputers and database and/or spreadsheet software. The product is in the
format of DBF databases, which can easily be converted into Access or Excel
files. Data Dictionaries, describing in detail the structure of each individual
database, were included with the product.
CD-ROM #3
53.
POPMAP application. This CD-ROM,
released in April 2000, contains the POPMAP application for the 1998 Population
Census of Cambodia. POPMAP, a United Nations software package, is an
integrated, easy-to-use software package for developing a computerized
geographical database of population data and related information. It combines
many components into one package.
·
A set of tools for creating, editing and maintaining a geographical
database with multidisciplinary statistics, map features and community-based
facilities;
·
A collection of capabilities for retrieving and processing data in a
worksheet environment, and for creating statistical graphs; and
·
A rich set of options for analysing, interpreting and developing
effective data presentations using maps.
54.
The Cambodia application consists of a country map and maps for each of
the 24 provinces. The country map has layers for the country, provinces and
districts. The provincial maps have layers for the provinces, districts and
communes.
55.
Furthermore, information on villages, schools, routes and rivers is
included for all maps. A large database with 123 different demographic and
socio-economic indicators, most of which are available down to the commune
level, forms the main thrust of the application.
56.
The development of the POPMAP application for Cambodia proved to be a
very cumbersome task. The initial version of the software was not very robust
resulting in a large number of system crashes. Most of the problems were
related to the projection and georeferencing of digitized maps. In order to
resolve these problems, the DPA established a dialogue with the authors of the
software in Hanoi, Vietnam. They were very helpful and frequently submitted
updates with software fixes. However, it took several months before a more
stable version became available in which the georeferencing worked properly.
CD-ROM #4
57.
Population Database. This CD-ROM, released in May 2000, contains
the WinR+ Population Database for the 1998 population census of Cambodia.
WinR+, another United Nations software package, is an abbreviation of
REDATAM-Plus for Windows, where REDATAM stands for REtrieval of DATa for small
Areas by Microcomputer. The database consists of the microdata of the 1998
Population Census of Cambodia—that is, all data records of the individual
persons and households. This permits the data user to produce any
cross-tabulation for any user-defined geographical area. For the Cambodia
application the lowest selectable geographical level is the village.
58.
The WinR+ software enables the data user to derive information easily
from the database, including new variables, tabulations, and other outputs. All
this can be achieved via graphical windows and without the assistance of a
programmer. The software also facilitates the processing of external databases
in one of the common formats such as dBASE. A data dictionary, describing in
detail the structure of the database, was included with the product.
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