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  • 8/3/2019 Geode Tics

    1/6

    What is Geodetics?Geodesy,also namedgeodetics, a branch ofEarth Sciences, is the scientific discipline that deals with the measurement and representation of theEarth.

    Geodesists also studygeodynamical phenomenacrustalmotionTides

    polar motion

    Geodesy (fromGreek

    o

    , l t. "

    v

    on of th

    E rth")

    pr m r ly conc

    n n

    th n th

    t

    mpor llyv ry n

    r v ty f

    l

    Thr

    D v on of G

    o

    yPhy c l G

    o

    yTh

    Stu

    y of th

    E rth Gr v ty F

    l

    Thr

    D v on of G

    o

    yH

    h

    r G

    o

    yconc

    rn

    th m

    ur n

    th

    E rth on th

    lob l c l

    Pr ct c l or En

    n

    r n

    G

    o

    y

    conc

    rn

    th m

    ur

    n

    p

    c

    f

    c p

    rt

    or r

    on

    of th

    E

    rth,

    n

    h

    ch

    nclu

    urv

    y n

    .H

    tory of G

    o

    yHum n ty h l

    y b

    n nt

    r

    t

    n th

    E rth.Dur n

    v

    ry

    rly t m

    th nt

    r

    t

    l m t

    , n tur lly, to th

    mm

    t

    v c n ty of hom

    n

    r

    ncy, n

    th

    f ct th t

    l v

    on n

    r ph

    r c l

    lob

    m y or m y not h v

    b

    n pp r

    nt.

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    o

    yA hum n ty

    v

    lop

    , o

    t nt

    r

    t n un

    r t n

    n

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    m pp n

    th

    z

    , h p

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    compo t on of th

    E rth.Dur n

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    ft

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    n

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    tron

    ly th t th

    rth

    r

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    ul r n h p

    .H

    ll

    n c Worl

    In E

    ypt, Er to th

    n

    ,

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    u

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    bl

    to

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    n

    ph

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    E t m t

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    h pp

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    th

    moon h n

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    ct n

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    htEurop

    J

    n P c r

    p

    rform

    th

    f r t mo

    rn m

    r

    n rc m

    ur

    m

    nt n 1699-1670 n

    J cqu

    C n l t

    r cont nu

    th

    ork of J

    n P c r

    n

    foun

    out th t th

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    not ph

    r

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    r n

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    19th C

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    rm n

  • 8/3/2019 Geode Tics

    2/6

    y. On

    of t mo t mport nt

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    th

    r v t on of n nt

    rn t on l

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    n

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    h ch houl

    b

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    but l o for th

    hol

    orl

    .

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    n

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    r

    on th

    put

    l n

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    f n t on r

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    tur

    ly n

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    n

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    of th

    t

    r ( xf thom or l

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    t

    r)R

    f r

    r

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    po t onof n

    ,

    v

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    o

    n rock outcrop , n

    oth

    r n tur l proc

    R

    f

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    f

    I l

    t A v

    ry m ll l n

    AtollAn toll cor l l n

    (or l n

    ) th t

    nc rcl

    l

    oonp rt lly or compl

    t

    ly.Top f v

    l r

    t Atoll n th

    Worl

    S y

    M lh B nk, W

    t

    rnIn

    n Oc

    n(35000km) , ubm

    r

    , l

    t

    pth 7 m,L n

    o

    n

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    t ofN

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    on (21000km), ubm

    r

    , l

    t

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    t Ch

    o B nk(12642km, l n

    r

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    B nk,Spr tly I l n

    (8866km), ubm

    r

    , l

    t

    pth 9 mM ccl

    f

    l

    B nk,South Ch n S

    (6448km), ubm

    r

    , l

    t

    pth 9.2 mNorth B nk (R tch

    B nk, north ofS y

    M lh B nk)(5800km), ubm

    r

    , l

    t

    pth

  • 8/3/2019 Geode Tics

    3/6

    M l y : P rt of th

    t t

    ofS b h;Ph l pp n

    : P rt ofP l

    nprov nc

    ;R

    publ c of Ch n (T

    n): P rt ofK oh un

    mun c p l ty;V

    tn m: P rt ofKhnh H Prov nc

    .

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    yCor l r

    f r

    th

    pr

    om n nt tructur

    of th

    l n

    ; th

    Spr tly

    roup cont n ov

    r 600 cor l r

    f n tot l.L ttl

    v

    t t on

    ro

    on th

    l n

    ,

    h ch r

    ubj

    ct to nt

    n

    mon oon .L r

    r l n

    r

    c p bl

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    trop c l for

    t, crub for

    t,co t l cru

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    r

    port

    ly cov

    r

    th hrub ,coconut, n

    m n

    rov

    n 1938;p n

    ppl

    l o cult v t

    h

    r

    h

    n t

    prof t bl

    Oth

    r ccount m

    nt onp p y ,b n n ,p lm, n

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    ch tr

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    l n

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    l n

    th t

    o h v

    v

    t t on prov

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    b r

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    -Foot

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    t Cr

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    th

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    n

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    , n

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    c l H z r

    D

    rupt on of n

    t n

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    uc

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    o

    , h

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    n

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    on

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    Ecolo

    c l H z r

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    vy comm

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    r probl

    m F h

    rm

    n u

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    olut on for f h po on n

    M l t ry

    roup n th

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    n

    n

    nv ronm

    nt lly

    m

    n

    ct v t

    uch hoot n

    turtl

    n

    b r

    , r

    n

    n

    t , n

    f h n

    th

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    c l H z r

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    coll

    ct on of r r

    m

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    ct n

    of

    oo

    n

    hunt n

    for th

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    tr

    r

    common thr

    t to th

    b o

    v

    r ty of th

    nt r

    r

    on, nclu

    n

    th

    l n

    .Cor l h b t t r

    thr

    t

    n

    by pollut on, ov

    r-

    xplo t t on of f h n

    nv

    rt

    br t

    H toryE rly C rto

    r phyTh

    f r t po

    bl

    hum n nt

    r ct on

    th th

    Spr tly I l n

    t

    b ck b

    t

    n

  • 8/3/2019 Geode Tics

    4/6

    600 BCE to 3 BCETh b

    on th

    th

    or

    t c l m

    r t on p tt

    rn of th

    p

    opl

    ofN nyu

    ( outh

    rnCh n n

    north

    rn V