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EAS 210 > Lab 5: Intro to Maps > Flashcards

Lab 5: Intro to Maps Flashcards

1
Q

Equal-area projection map + example

A

projection of the Earth that preserves area but distorts the shape of the land.

Mollweide projection

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2
Q

Conformal projections + example

A

projection of the Earth that preserves shape but distorts area

Mercator projection

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3
Q

what do all maps have

A

LOTS

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4
Q

what does LOTS stand for

A

Legend

Orientation - North arrow + coordinate system

Title
Scale - scale, vertical exaggeration

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5
Q

Parallels of latitude + requirement

A

lines running east-west direction. Must have N or S to indicate what side of the equator they are on

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5
Q

Meridians of longitudee

A

lines runnning North-South direction,

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6
Q

DMS + what it stands for

A

latitude/longitude coordinate system. Stands for degrees, minutes, seconds

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7
Q

How is a DMS coordinate seperated

A

Latitude/Longitude (1 degree)

Each 1 degree is divded into 60 minutes (60’)

Each minute is divided into 60 seconds (60”)

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8
Q

How to find the DMS LATITUDE of a point on a map

A
  1. Find the DMS coordinate system lines. Find your point
  2. Find the line under the point that you want. (The parallel) This will give you the degree and minute of the point.
  3. Measure the distance from the bottom of of the section (bottom parallel)) WANT
  4. Measure the vertical length (distance between the parallels) of the degree section. HAVE
  5. Set the ratio of want / have = x / 60
  6. Add N or S at the end depending on which side of the globe you are on
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9
Q

How to find the DMS LONGITUDE of a point on a map

A
  1. Find the DMS coordinate system lines. Find your point
  2. Find the line right of the point that you want. (The meridian) This will give you the degree and minute of the point.
  3. Measure the distance from the right side of of of the section (right meridian) WANT
  4. Measure the horizontal length (distance between the meridians) of the degree section. HAVE
  5. Set the ratio of want / have = x / 60
  6. Add E or W at the end depending on which side of the globe you are on
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10
Q

What order are UTM coordinates always given in + what units are they always in

A

Grid zone (given on map), Eastings, Northings

meters

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11
Q

What band letter in UTM is the equator

A

M

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12
Q

What is the range of UTM band letters in the North section of the globe

A

N-X

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13
Q

How do you get the number for the UTM coordinate system grid zone

A

counted eastward from the international line

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14
Q

how to find UTM Easting

A
  1. Measure the distance from the left Easting (numbers increase moving to the right) WANT
  2. Measure the total horizontal length of a section. HAVE
  3. Put the ratio as WANT / HAVE = x /1000
  4. Write E or W after number
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15
Q

What is each UTM section divided into

A

1000

16
Q

how to find UTM Northing

A
  1. Measure the distance from the bottom Northing line (numbers increase moving up) WANT
  2. Measure the total horizontal length of a section. HAVE
  3. Put the ratio as WANT / HAVE = x /1000
  4. Write N or S after the number
17
Q

Which part of Canada is DLS used in

A

The prairie provinces

18
Q

Format of DLS coordinate system

A

LSD-Section-Township-Range-WxM

19
Q

How do you find the WxM component of the DLS coordinate system

A

West of a reference Meridian

20
Q

Range line orientation in DLS coordinate system

A

Parallel to meridians, numbered East to west

21
Q

Township line orientation in DLS coordinate system

A

Perpendicular to meridians, numbered North to South

22
Q

How many sections is a Township divided into

A

36

23
Q

How to find DLS coordinate

A
  1. Find squares for the DLS coordinate system. In the middle cross of the township, there will be a number on the horizontal line and a number on the vertical line.
  2. The number for the vertical line is the range (meridian)
  3. The number for the horizontal line is the Township (parallel
  4. Divide the section into 36 squares. Count starting from the bottom right and snaking back and forth going up (same as a game of snakes and ladders). The number you land on is the Section
  5. Divide the Section into 16 LSD (legal subdivisions). Snakes and ladder your way up to the correct section.
  6. Find which WxM the point is west of.
  7. Put it into LSD-Section-Township-Range-WxM
24
Q

what do closely packed contours line indicate

A

steep hills

25
Q

when drawing topography lines what must you do over rivers

A

draw a v pointing upstream

26
Q

how to draw a topographic profile

A
  1. draw a line denoting the line along your topographic map
  2. use the straight edge of a paper, mark ticks where the topographic lines touch the paper. Label their corresponding elevation
  3. Mark the tick marks on a graph on the x-axis. The y-axis will be the corresponding elevation of each of the ticks. Connect the points - you shouldn’t have flat surfaces
  4. Don’t forget LOTS + vertical exaggeration + label rivers , trails, roads, etc.
27
Q

vertical exaggeration formula

A

VE = Vert. Scale / Horizontal Scale

meters needs to be on the bottom of both fractions

28
Q

If you are given a bunch of topography points with a river flowing through it, how would you draw the contour lines for it

A

let interval of contour lines = 10

so you would draw through all of the dots that are an elevation increase of 10, ie. 150, 160, 170,180. You cannot go through multiple elevations with one line - each elevation gets its own contour line.

The contour line should surround all points smaller than it.

Rivers must have a v pointing upstream wherever the contour curve crosses it

29
Q

where should you put the orientation on a topographic profile

A

on the graph, NOT by the axis

30
Q

should you label A - A’ on a topographic graph

A

Absolutely dumbass

EAS 210 (20 decks)

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