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What would you do to overcome obstacles such as a pond in a chain survey?

 When encountering obstacles such as a pond during a chain survey, there are several approaches you can take to overcome them and continue with the survey. Here are a few possible solutions:



Re-route the Survey Line: If the pond is relatively small and doesn't cover a significant portion of the survey area, you can choose to re-route the survey line around the pond. This may involve adjusting the survey stations and measuring the distances and angles to create a new survey line that avoids the obstacle.

Establish Temporary Crossings: In some cases, it may be possible to create temporary crossings over the pond to continue the survey. This can be done by laying temporary bridges, using floating platforms, or constructing stepping stones to move across the pond while maintaining survey measurements. Ensure safety precautions are taken when using temporary crossings.

Use Remote Measurement Techniques: If accessing the pond physically is not feasible or safe, you can employ remote measurement techniques to determine the distances and angles across the pond. This can include using laser rangefinders, total stations, or GPS equipment to measure the required distances and angles from a safe location. These measurements can then be used to calculate the positions and distances in the survey.


Employ Alternative Survey Methods: Depending on the specific requirements of the survey, you may consider alternative survey methods that are more suitable for areas with obstacles like ponds. For example, aerial surveying techniques such as drone-based photogrammetry or LiDAR can be used to collect data over the pond without physically crossing it.

Document the Obstacle: If it is not possible to physically survey across the pond or find alternative solutions, document the presence of the pond and its coordinates accurately. This information can be included in the survey report or map as a known obstacle, and its impact on the survey can be clearly stated.


It's important to assess the feasibility and safety of each solution based on the specific circumstances of the survey area and the size and nature of the pond. Consulting with experienced surveyors or professionals in the field can provide valuable insights and guidance for overcoming obstacles effectively while maintaining survey accuracy.

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