sào ngắm
Definition
- Noun:
- A ranging pole / a sighting rod: A long, straight pole, often painted with alternating colored bands (e.g., red and white), used in surveying, construction, and land measurement. Its primary function is to mark a specific point or to provide a precise visual reference line for aligning measurements, ensuring straightness and accuracy over a distance.
Usage Examples
- Noun:
- Người trắc địa cắm sào ngắm trên đỉnh đồi. (The surveyor planted the ranging pole on the hilltop.)
- Chúng tôi dùng ba cái sào ngắm để định hướng đường thẳng cho hàng rào. (We used three sighting rods to align a straight line for the fence.)
- Hãy nhìn theo sào ngắm để canh cho thẳng. (Look along the ranging pole to align it straight.)
Advanced Usage
- In professional contexts like civil engineering or cartography, sào ngắm is an essential tool for establishing baselines, contours, and boundaries before detailed measurements are taken with more precise instruments.
Variants and Related Words
- Thước ngắm (n): A sighting level or alidade; an instrument with a telescopic sight used for leveling or measuring angles, often used in conjunction with a sào ngắm.
- Cọc tiêu (n): A general term for a stake or a marker pole, which can be less precise than a sào ngắm.
Synonyms
- Surveyor's pole: A pole used in land surveying.
- Ranging rod: A rod used for marking positions and sighting in surveying.
- Line pole: A pole used to establish a straight line.
Related Terms
- Trắc địa (n): Surveying, the science of measuring land.
- Định tuyến (v): To align, to lay out a route or line.