1. Metrological calibration and testing is a precise measurement work. In various testing procedures, there are corresponding requirements for laboratory vibration, ground load, sound, electromagnetic radiation, temperature and humidity and other technical indicators. Therefore, in order to reduce the increased investment to meet these technical indicators, special attention should be paid to site selection.

2. Special requirements of special laboratories should be considered when determining the area of land use, such as some laboratories should be well grounded separately, and the grounding end should be far away from buildings; acoustic laboratories should be built separately to keep away from vibration; high voltage laboratories should ensure safe high voltage discharge distance, and so on.

3. In determining the land area, the reserved area for later development should be considered. With the rapid development of metrology calibration industry, testing items and testing equipment are constantly updated and increased. In order to better meet the testing needs, sufficient space should be reserved for later construction in the early planning stage.