The phrase "direct survey" is correct and usable in written English.
It can be used when referring to a survey that is conducted in person or through direct interaction with respondents.
Example: "The researchers conducted a direct survey to gather firsthand information from the participants."
Alternatives: "face-to-face survey" or "in-person survey."
We have used a direct survey method, specifically the marketing research.
We provide a case study of using distribution and occupancy modeling in unison to direct survey efforts, provide estimates of species presence/absence, and to identify local and landscape features important for species occurrence.
The research program was consequent to the direct survey of the tower, carried out within a wide cataloguing activity of the main religious buildings in Monza and highlighting a weak structural layout of the bell-tower.
Firstly, a direct survey has been taken of the factors creating insecurity in the citizens of Mantova and Pegognaga.
The empirical evidence needed to assess the research hypotheses formulated was collected through a direct survey carried out by means of a questionnaire.
Data were gathered from a questionnaire administered via a direct survey to both farmers and processors in a traditional high-quality dairy sheep supply chain in the Italian region of Sardinia: the Pecorino Romano Protected Designation of Origin.
'Economic statistics' is used in its narrow definition, as statistics produced by official statistical agencies and derived from direct surveys or from Government administrative records.
The methods that were used in the analysis include the method of direct surveying of inhabitants, the method of observation and the method of measuring the characteristics of different materials used for pavement in the pedestrian zone.
This paper provides the foundation for the Nigerian Rural Electrification Agency (NREA) to develop an electrification plan as well as involve all stakeholders in carrying out direct surveys towards generating a database for rural electrification status in Nigeria.
There is need for NREA to generate a database through direct surveys to get the real picture of rural electrification in Nigeria by collaborating with other agencies such as the National Bureau of Statistics, National Population Commission and Independent National Electoral Commission.
The 2015 National Firearms Survey was based on direct surveys of individual gun owners.
