local attraction | compass surveying

Cause of local attraction:
Our compass gets locally attracted on site sue to the presence of magnetic materials like iron, pole, or any house, industrial building made up of GI sheets.
In that case our compass generates error and here is the video how we make corrections of such error and i hope you are going to love it.
Numerical based on calculation of interior angle in compass surveying for reduced bearing:
• Compass Surveying- To ...
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Leveling:
There of two method of doing leveling and they are as follow:
1. Height of instrument method
• HEIGHT OF INSTRUMENT M...
2. Rise and fall method:
• Determination of reduc...
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