Urban Green Areas – their functions under a changing lifestyle of ...

1.4.4.2 Not-standardized surveys
There are three main types of unstructured interviews:
The most open one are the narrative interviews which are conducted in particular with socalled
contemporary witnesses who can talk about and explain their subjective perspective
of historical events. This type of interview is also used to collect information in the context
of personal biographies.
The semi-structured interview is a useful method to exploit in depth the knowledge of
experts in different fields. The questions and experts’ fields were constructed as a metric,
including: planning, management, involvement, positive-/negative improvements,
responsibility, satisfaction, trends/projecting future aspects and ran ing par s’ elements. It
permits flexibility to tailor the interviews to the personality, knowledge and experience of
the respondents and allows the discussion to develop.
Expert and informal interviews are two very different types of interview with regard to
their purpose and the quality of the information obtained.
Due to the purpose this method, criterion to choose experts are who works in concerned
fields, who has practical knowledge, works directly about parks and gardens in Hanoi.
However, they can be the local par users, who remember about par s’ utilization since
many years. They also are the social, historical scientists who observe the society and often
provide hypotheses about future trends.
The weakness of this method are sometime experts talk too long, and away from main
points; sometimes it is difficult to contact with them due to their time schedules, not willing
to help, privacy, and so on. In addition, sometimes we receipted just standard responses.
1.4.5. Mapping
Mapping is a method of recording, description, analysis, synthesis and perception of
phenomena (reality) as well as forecasting their development through the creation and use
of maps. In this thesis, mapping is used at two levels:
Using maps to show the location of the invested area in relative with recognized
regions.
Displaying correlations by combining the maps derived from different data sets. (HIEU
2003).
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