With the rapid development of digitalization and implementation of artificial intelligence,the visible, technical sceneries of urban landscapes are transformed into an invisibleworld of surveillance and algorithm. Our previous cognition and connection with theouter world which relied on bodily sensations (such as hearing and vision) are nolonger sufficient. Technology and microsensors seem to offer key opportunities for usto enter the digital world of big data microsensors and data modulation, a world whichis unreachable (un-sensible) to physical sensations.

The operation of a digital city relies heavily on various data monitoring andmathematical modulation. The phenomena behind these data are like invisible layers,overlapping in the city and forming our surroundings. In Hidden layer of City [Taipeiver.], I conduct experiments with several microsensors such as gas (CH4, CO, CHCH3,H2, CH3-CH2-OH, CO2, CO) sensors, soil material sensors, and plant ecologysensors. The documented data (such as numerical value, location, and time) areprocessed through algorithms, surveying and experimenting the invisible layers in thecity through visual installations and sound installations.