civil 3d draw line by latitude and longitude

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Latitude and longitude are measurements of location on the world. If you lot know how to read latitude and longitude on a map, you can determine the geographic coordinates of any spot on the map. While online maps make information technology easy to determine latitude and longitude with the click of a button, sometimes it is helpful to know how to do it on newspaper. In order to read latitude and longitude correctly, y'all must first understand the basic concepts behind these measurements. Once you have the basics downwardly, learn how to identify latitude and longitude markers on a map and pinpoint exact locations.

1. i

   Go familiar with the concept of breadth. Latitude is a measure of altitude north or south of the equator, which is an imaginary horizontal line effectually the exact mid-bespeak of the earth between the 2 poles. The world is divided up into 180 latitude lines on either side of the equator, called parallels. These parallels run horizontally around the earth, parallel to the equator. ninety of them are northward of the equator, while the other 90 are south of it.^[one]

2. two

   Learn the definition of longitude. Longitude is a measure of altitude e or west of an imaginary vertical line that runs down the outside of the globe from the North Pole to the South Pole, chosen the prime meridian. The prime number pinnacle could have been chosen to be anywhere, but there is an international agreement that the meridian that runs through Greenwich, England, is considered the official prime elevation, with 0° longitude. Longitude lines are a series of vertical lines from North Pole to the South Pole, also chosen meridians because every place touched past the same pinnacle have midday at the same fourth dimension. There are 360 meridians on either side of the prime number meridian, with 180 of them located e of the prime meridian, and the other 180 located to the west of it.^[2]

   • The meridian on the contrary side of the globe from the prime number summit is chosen the anti-superlative.^[3]

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3. 3

   Examine the units of measurement used for breadth and longitude. The measurements of latitude and longitude are usually expressed in degrees (°), minutes (′), or seconds (″). The entire altitude from one parallel to another or ane acme to another is 1°. To produce even more than accurate measurements, each degree can exist further divided up into 60 minutes, and each minute into 60 seconds (for a total of three,600 seconds per degree).^[4]

   • Latitude and longitude are measured in degrees rather than absolute units of measurement (such as miles or kilometers) because the Earth is spherical. While the altitude between degrees of breadth is constant (60 nautical miles or 111.12 km), the Globe'southward shape causes the altitude betwixt degrees of longitude to decrease as you lot approach the poles.^[five]

4. iv

   Measure latitude and longitude relative to the 0 betoken. When measuring latitude in either direction, the equator is considered the starting point, at 0° breadth. Too, the prime number meridian is the starting point for measures of longitude, representing 0° longitude. Every measure out of latitude or longitude is expressed in terms of how far information technology is from the origin indicate in either direction.^[6]

   • For example, the North Pole is at xc°North, meaning it is xc° n of the equator.
   • The antimeridian is at 180° either east or w from the prime superlative.
   • The Corking Sphinx of Giza in Egypt is located at 29°58′31″N, 31°eight′15″East. This means it is just under 30° north of the equator in latitude, and almost 31° e of the prime meridian in longitude.

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1. 1

   Find a map with latitude and longitude lines. Non all maps indicate latitude and longitude. You are most likely to find them on maps of large areas, such every bit atlas maps, or on smaller maps that are designed to reflect the terrain extremely accurately, such as topographic maps. If y'all are in the United states, detailed topographic maps of virtually regions are available through the U.s.a. Geological Survey.

2. two

   Pinpoint the location you are interested in. Take look at the map, and locate the feature or area for which you lot would similar to know the coordinates. Marker the verbal spot you are interested in with a pin or a pencil mark.

3. three

   Locate the latitude and longitude markers. Latitude is indicated on a map by a series of evenly-spaced horizontal lines running from ane side of the map to the other, while longitude is indicated by a serial of evenly-spaced vertical lines running from top to lesser. Look for numbers along the edges of the map giving coordinates for each line. These numbers are called "graticules."^[vii]

   • Latitude graticules are marked along the due east and west edges of the map. Longitude graticules are marked on the northward and south edges.
   • Depending on the scale of your map, the graticules may marking fractions of degrees rather than whole degrees. For instance, there may be a Graticule marked at every minute inside a degree instead of every degree (e.g., 32°0′, 32°1′, and so on).
   • The map should besides indicate where the latitude and longitude depicted are relative to the equator and prime meridian, respectively (eastward.g., North or South, East or West).
   • Have care not to misfile the breadth and longitude lines with UTM lines, some other type of grid coordinate organisation often establish on maps. UTM numbers are normally marked in a smaller text (and without caste symbols) along the edges of the map, and UTM gridlines may be marked in a dissimilar color from latitude and longitude lines.

4. four

   Apply a ruler to marking the latitude of your point. Take a ruler and a pencil and mark a level horizontal line from your point to the nearest east or west edge of the map. Brand certain your line is parallel to the nearest latitude line on the map.

5. five

   Describe another line to mark the longitude of the point. Starting from the same point, utilize the ruler and pencil to draw a straight vertical line to the nearest north or south edge of the map. Brand sure your line is parallel to the closest longitude line.

6. 6

   Estimate the breadth and longitude of your indicate using the graticules. Depending on the scale of the map, you may be able to estimate the coordinates of your signal down to the second. Look at where your breadth and longitude lines intersect the coordinate lines on the edge of the map, and estimate the coordinates past their position relative to the closest graticules.

   • If your map shows seconds, find the 2d closest to where each line intersects the latitude or longitude scale at the edge of the map. For instance, if your latitude line falls about five″ above the 32°20′N line, your point is at a latitude of approximately 32°20′5″North.
   • If your map shows minutes, but not seconds, then yous can estimate your latitude or longitude to within 6 seconds by dividing the infinite betwixt each graticule into 10ths. If your longitude line falls near two/10 to the left of the 120°14′East line, then the longitude is roughly 120°14′12″Due east.

7. vii

   Put your measurements together to make up one's mind the coordinates. Geographic coordinates are the place where the latitude and longitude lines converge on a unmarried bespeak. Wait at the numbers yous got for the latitude and longitude of your point, and put them together (e.g., 32°xx′5″Northward, 120°xiv′12″E).^[8]

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Add New Question

• Question

  How do yous read latitude and longitude on a map?

  

  Drew Hawkins1

  Community Reply

  Utilise a map with latitude and longitude lines and pinpoint the location you're trying to find coordinates for. Find the breadth and longitude markers, and utilise a ruler and a pencil to draw a line from your indicate to the nearest east or w edge of the map. And then, draw a vertical line from your indicate to the nearest north or south edge of the map. Then, take the numbers you got for the latitude and longitude of your bespeak and put them together. For example, you could finish up with 32°20′5″N, 120°fourteen′12″East as your coordinates.

• Question

  How do I find my exact coordinates?

  

  Drew Hawkins1

  Community Respond

  If you've got a smartphone, you tin become to Google Maps and observe your exact coordinates. If you're using a map with longitude and latitude lines, stick a pivot where you're located. And so, draw a straight horizontal line from your point to the eastward or west edge of the map. Then, draw a vertical line from your location to the due north or due south edge of the map. Put together the ii coordinates to observe your position.

• Question

  Is latitude vertical or horizontal?

  

  Drew Hawkins1

  Community Answer

  Latitude lines run horizontally across the World and are parallel to the equator. They can as well be chosen parallels of latitude. Longitude lines run from north to south and are perpendicular to the equator. An easy mode to remember which is which is to think of longitude as "long" like hair that hangs down. Longitude lines hang down over the World from north to south and latitude run across information technology, parallel to the equator.

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Article Summary 10

Breadth and longitude are measurements of location on the globe. To find latitude on a map, look for a serial of evenly-spaced horizontal lines with numbers forth the edges. Alternatively, to find longitude, look for a series of vertical lines from the North Pole to the South Pole. When yous're prepare to put your knowledge to the test, pick the location you're interested in. And so, find the latitude and longitude markers that run forth the top and side of the map. Utilise a ruler to make a line going up and some other i going to the side of the point to marker the measurements for your location. To learn how to put your measurements together to find the coordinates of your location, proceed reading!

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