Page 334 - Invited Paper Session (IPS) - Volume 2

IPS271 Edgar Vielma Orozco et al.
The data collection of the 2020 Census, as already mentioned, will
implement a multimodal approach, which contemplates the Personal
Computer-Assisted Interview as the main procedure and in which phablet-
type mobile devices will be used. This contributes directly to the congruence
of the data and affects the coverage of areas, since it makes it possible to
integrate a primary validation of the data that is recorded during the interview,
to control the interview more adequately by automating the flows based on
the answers of the informant, and to automatically indicate the operational
situation of the work areas.
To carry out a correct identification of buildings and georeferencing of the
information, the interviewer will list the dwellings and affix a label on them,
whose design includes an individual unique QR code. The QR code will also be
used in the self-enumeration strategy, since the interviewer will leave
invitation letters in the dwellings with no response or upon request of the
informant. These invitations contain a QR code that includes a unique
username and password for each dwelling, in addition to the necessary
instructions for the registration of information via the Internet and an
assistance telephone number. The use of these codes will also strengthen the
post-enumeration operation.
The use of GPS has several purposes, among which can be listed: to indicate
the proximity of the staff in the field, not only to the work areas but also to
the northwest corner where the reconnaissance route and / or the information
gathering should start; to record the coordinates of the personnel paths in the
work areas, mainly the supervisor and the interviewer, which facilitates the
work of supervision, verification and post-enumeration, since these
coordinates can be represented in the geographic module for access to the
work areas of the staff responsible for these operations; georeferencing each
of the buildings and dwellings of the country, which together with the QR code
of the labels will allow updating the National Inventory of Dwellings and will
be the start of the statistical registration of the real estate in the country.

7. Discussion and Conclusion
The use of mobile devices undoubtedly offer advantages over the use of
paper. The adoption of new operating procedures and information processing,
which start even before the data collection itself with the digital cartography
update, requires special attention and care.
Regarding the applications, it is necessary to accelerate the life cycle of the
development in order to minimize the maintenance stage during the
operation, and to revise the flow of the information. This implies the realization
of a greater number of tests, both in controlled conditions and in the field,
which range from field work to the production of information in order to
reduce the time for the presentation of results.

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