Survey markers are physical objects placed on the ground to indicate specific locations for land surveying. They help surveyors measure distances and angles accurately, ensuring that property boundaries and land features are correctly mapped. These markers can be made of various materials, such as metal, plastic, or concrete, and are often engraved with identification numbers. Typically, survey markers are used in construction, real estate, and environmental studies. They provide a reliable reference point for future surveys and help maintain consistency in land measurements. Common types of survey markers include monuments, stakes, and pins.