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Visibility | Web Scraping Tool | ScrapeStorm

2026-04-30 13:35:30

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Abstract：Visibility refers to the maximum horizontal distance at which an observer can discern the outline of a target object in the atmosphere. ScrapeStormFree Download

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Introduction

Visibility refers to the maximum horizontal distance at which an observer can discern the outline of a target object in the atmosphere. It is an important meteorological element describing atmospheric transparency, typically measured in meters (m) or kilometers (km). Visibility is significantly affected by the scattering and absorption of light by suspended particles in the atmosphere (such as aerosols, fog droplets, smoke, precipitation particles, etc.) and serves as a critical indicator for assessing air quality, transportation safety, and meteorological conditions. Observation methods for visibility include manual visual estimation, forward scatter visibility meters, transmissometers, and camera-based atmospheric visibility retrieval techniques. In fields such as aviation, navigation, road transportation, and environmental monitoring, visibility is a key meteorological parameter affecting operational safety and decision-making.

Applicable Scene

Suitable for various scenarios requiring quantitative assessment of atmospheric transparency. Typical applications include: airport runway visual range (RVR) assessment and flight takeoff/landing decisions, safety management of vehicles in foggy sections of highways, port shipping scheduling and vessel entry/exit management, air quality monitoring and smog warnings, routine reporting by meteorological observation stations, performance boundary determination for visual sensors in autonomous driving systems, and meteorological support for large outdoor events (such as sports competitions and drone shows).

Pros: Intuitively reflects the degree of atmospheric cleanliness and the impact of weather phenomena on visibility. Observation equipment is mature and highly standardized, serving as an important decision-making basis for traffic control and environmental monitoring. Closely related to public daily life, making it easy to understand and apply.

Cons: Manual visual estimation has strong subjectivity, with potential for significant deviation among different observers. Nighttime visibility observation is difficult and typically requires auxiliary artificial light sources. Under precipitation conditions such as fog, rain, or snow, rapid changes in visibility demand high-frequency real-time monitoring and data updates. Instrument-based observations are affected by contamination of optical windows or calibration drift, requiring regular maintenance.