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Related Pages
Related Symbols
GeomagneticModelData
GeoGraphics
GeoBoundsRegion
GeoPosition
CoordinateBounds
QuantityArray
Lookup
Related Categories
Geography
Data Science
Extrema Values of the Earth's Magnetic Field in a Region
Example Notebook
Open in Cloud
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Define a region near the North Pole from its latitudes and longitudes:
I
n
[
1
]
:
=
l
a
t
=
{
6
5
,
8
5
}
;
l
o
n
=
{
-
3
0
,
3
0
}
;
Plot this region on a world map:
I
n
[
2
]
:
=
p
l
o
t
=
G
e
o
G
r
a
p
h
i
c
s
G
e
o
B
o
u
n
d
s
R
e
g
i
o
n
[
{
l
a
t
,
l
o
n
}
]
,
O
u
t
[
2
]
=
Get data about the Earth's magnetic field in this region:
I
n
[
3
]
:
=
d
a
t
a
=
G
e
o
m
a
g
n
e
t
i
c
M
o
d
e
l
D
a
t
a
T
r
a
n
s
p
o
s
e
[
{
l
a
t
,
l
o
n
}
]
,
.
.
.
O
u
t
[
3
]
=
Extract the components of the Earth's magnetic field:
I
n
[
4
]
:
=
c
o
m
p
o
n
e
n
t
s
=
{
"
N
o
r
t
h
C
o
m
p
o
n
e
n
t
"
,
"
E
a
s
t
C
o
m
p
o
n
e
n
t
"
,
"
D
o
w
n
C
o
m
p
o
n
e
n
t
"
}
;
a
r
r
=
L
o
o
k
u
p
[
d
a
t
a
,
c
o
m
p
o
n
e
n
t
s
]
O
u
t
[
4
]
=
Q
u
a
n
t
i
t
y
A
r
r
a
y
D
i
m
e
n
s
i
o
n
s
:
{
4
0
,
9
4
}
U
n
i
t
:
N
a
n
o
t
e
s
l
a
s
,
Q
u
a
n
t
i
t
y
A
r
r
a
y
D
i
m
e
n
s
i
o
n
s
:
{
4
0
,
9
4
}
U
n
i
t
:
N
a
n
o
t
e
s
l
a
s
,
Q
u
a
n
t
i
t
y
A
r
r
a
y
D
i
m
e
n
s
i
o
n
s
:
{
4
0
,
9
4
}
U
n
i
t
:
N
a
n
o
t
e
s
l
a
s
Convert the list of arrays into an array of 3-vectors:
I
n
[
5
]
:
=
q
a
=
T
r
a
n
s
p
o
s
e
[
Q
u
a
n
t
i
t
y
A
r
r
a
y
[
a
r
r
]
,
{
3
,
1
,
2
}
]
O
u
t
[
5
]
=
Q
u
a
n
t
i
t
y
A
r
r
a
y
D
i
m
e
n
s
i
o
n
s
:
{
4
0
,
9
4
,
3
}
U
n
i
t
:
N
a
n
o
t
e
s
l
a
s
Use
C
o
o
r
d
i
n
a
t
e
B
o
u
n
d
s
to obtain the ranges of the components of the Earth's magnetic field in the specified region:
I
n
[
6
]
:
=
T
h
r
e
a
d
[
c
o
m
p
o
n
e
n
t
s
C
o
o
r
d
i
n
a
t
e
B
o
u
n
d
s
[
q
a
]
]
/
/
T
a
b
l
e
F
o
r
m
O
u
t
[
6
]
/
/
T
a
b
l
e
F
o
r
m
=
N
o
r
t
h
C
o
m
p
o
n
e
n
t
{
1
8
2
3
.
4
7
n
T
,
1
4
7
2
0
.
3
n
T
}
E
a
s
t
C
o
m
p
o
n
e
n
t
{
-
3
9
6
3
.
8
8
n
T
,
3
2
6
6
.
1
4
n
T
}
D
o
w
n
C
o
m
p
o
n
e
n
t
{
4
9
2
6
4
.
4
n
T
,
5
6
7
9
8
.
8
n
T
}
Related Symbols
GeomagneticModelData
GeoGraphics
GeoBoundsRegion
GeoPosition
CoordinateBounds
QuantityArray
Lookup
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