REVISION CLASSES PRELIMS 2017 NEW SCHEDULE

ForumIAS is conducting revision classes for Prelims 2017. Due to extremely high number of candidates taking up classes, we have come up with a new schedule which will repeat the classes already held. The goal is to cover maximum topics in minimum time possible. So if you have not been able to attend these, please register. Seats fill up in a few hours, so register early. Click Here to know more and register early to avoid inconvenience

Magnetic dip,Magentic declination

what are the reasons for it apart from local attraction.pls enumerate friends.
1 prelims,2 mains - CSM and IFS
Psychology .
·

Comments

  • is local attraction included in all these or its simply computed separately in surveying?
    1 prelims,2 mains - CSM and IFS
    Psychology .
    ·
  • Both Dip and declination don't depend on local attraction.
    if u hold a compass in a vertical plane it will show some angle with the horizon, that is dip.
    Declination is just the difference in angle between true north and geographic north. ( true north is somewhere in Canada and geographic north is north pole.)
    Both dip and declination varies from one place to another.
    Local attraction is caused when a magnetic compass is affected by nearby magnetic field like iron shades, transmission towers etc. Local attraction is different for different points in a field plot and yes they are needed to be calculated and adjusted to true readings.

    But I am curious, does ur optional psychology includes surveying topics?
    "The fault, dear Brutus, is not in our stars, But in ourselves, that we are underlings."
    ·
  • thanks for ur explanation bro.

    forestry includes surveying :) .
    1 prelims,2 mains - CSM and IFS
    Psychology .
    ·
  • ok. :smile:
    "The fault, dear Brutus, is not in our stars, But in ourselves, that we are underlings."
    ·
Sign In or Join to comment.

Welcome!

We are a secret self-moderated community for Civil Services preparation. Feel free to join, start a discussion, answer a question or just to say Thank you.

Just dont spread the word ;)

Sign in or join with Facebook or Google