All the important parameters of travel are surveyed using a standardized questionnaire, the basic questions of which have remained unchanged since 1988.
A population of 12,886 were surveyed using a brief questionnaire.
The easternmost five of the seven were surveyed using SeaBeam bathymetry.
Each limb could be surveyed separately using local vantage points.
Over a period of three days, a total of seven hectares was surveyed using ground-penetrating radar.
Over 2.5 million line km has now been surveyed using the technique.
The change does not affect data for traditional public and private schools, which have always been surveyed using a random sample.
Nine sites from four provinces were surveyed using 36 ecological parameters.
About half the fort was surveyed using a proton magnetometer.
The religious views of the people of Slovenia have been surveyed twice in the 1990s using different methods.