 # How do map coordinates work?

## How do map coordinates work?

The geographic coordinate system consists of latitude and longitude lines. Each line of longitude runs north–south and measures the number of degrees east or west of the prime meridian. Values range from -180 to +180°. Lines of latitude run east–west and measure the number of degrees north or south of the equator.

## How are coordinates written?

Write the latitude and longitude coordinates. When writing latitude and longitude, write latitude first, followed by a comma, and then longitude. For example, the above lines of latitude and longitude would be written as “15°N, 30°E.”

## What are the 5 latitude lines?

The five major parallels of latitudes from north to south are called: Arctic Circle, Tropic of Cancer, Equator, Tropic of Capricorn, and the Antarctic Circle.

## How do you convert coordinates?

Community Mapping Experiment: How to Convert Latitude and Longitude to Map Coordinates

1. Step 1: Multiply (×) the “degrees” by 60.
2. Step 2: Add (+) the “minutes”
3. Step 3: If the Latitude (Longitude) degrees are S (W) use a minus sign (“-“) in front.
4. Step 4: Subtract Reference Location converted to Minutes.

## Why is latitude 180 degrees?

A circle is divided into 4 quarters of 90 degrees each. If you stood above the earth and looked down on the north pole from above, you would see the complete circle of the equator. So longitude goes from zero to 360 degrees. Latitude lines are parallel to the equator which has latitude = zero degrees.

## How do you convert XY coordinates to latitude and longitude?

Assign the values of the coordinates to x, y and z. Assume the value 6371 km to the variable R, which is the approximate radius of earth. This value is the scientifically derived value for radius of the earth. Calculate latitude and longitude using the formula: latitude = asin (z/R) and longitude = atan2 (y,x).

## Is Latitude up or down?

Have students look at the U.S. map and find the lines running across and up and down the page. Tell students that the lines running across the page are lines of latitude, and the lines running up and down the page are lines of longitude. Latitude runs 0–90° north and south. Longitude runs 0–180° east and west.

## What place is 100 degrees longitude?

The meridian 100° west of the Prime Meridian of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, North America, the Pacific Ocean, the Southern Ocean, and Antarctica to the South Pole. The 100th meridian west forms a great circle with the 80th meridian east.

## What is the first place to start a new day?

The first major cities to experience a new day are Auckland and Wellington, New Zealand (UTC+12:00; UTC+13:00 with daylight saving time). A 1994 realignment of the IDL made Caroline Island one of the first points of land on Earth to reach January 1, 2000, on the calendar (UTC+14:00).

## What are the different types of GPS coordinates?

Most GPS devices provide coordinates in the Degrees, Minutes and Seconds (DMS) format, or most commonly the Decimal Degrees (DD) format. The popular Google Maps provides their coordinates in both DMS and DD formats.

## Is 12am the start or end of the day?

Another convention sometimes used is that, since 12 noon is by definition neither ante meridiem (before noon) nor post meridiem (after noon), then 12am refers to midnight at the start of the specified day (00:00) and 12pm to midnight at the end of that day (24:00).

## Where does the day start on the globe?

The Royal Observatory in Greenwich, England, is the key location for timekeeping worldwide. It is also located at the internationally recognized prime meridian, which is 0 degrees longitude, where each day begins at midnight.

## What are the 7 major lines of longitude?

Terms in this set (7)

• North Pole. 90 degrees north.
• Arctic Circle. 66.5 degrees north.
• Tropic of Cancer. 23.5 degrees north.
• Equator. 0 degrees.
• Tropic of Capricorn. 23.5 degrees south.
• antarctic circle. 66.5 degrees south.
• south pole. 90 degrees south.

## Why is 180 degree line of longitude zigzag?

The time difference on either side of this line is 24 hours. So, the date changes as soon as one crosses this line. To avoid any confusion of date, this line is drawn through where the sea lies and not land. Hence, the IDL is drawn in a zig-zag manner.

## How do you convert coordinates into degrees?

Example: Convert decimal degrees 156.742 to degrees minutes seconds

1. The whole number is degrees.
2. Multiply the remaining decimal by 60.
3. Multiply the remaining decimal by 60.
4. Decimal degrees 156.742 converts to 156 degrees, 44 minutes and 31 seconds, or 156° 44′ 31″.

## Do longitude lines go up to 180 degrees?

Longitude is the measurement east or west of the prime meridian. The distance around the Earth measures 360 degrees. The meridian that runs through Greenwich, England, is internationally accepted as the line of 0 degrees longitude, or prime meridian. The antimeridian is halfway around the world, at 180 degrees.

## What comes first latitude or longitude?

Handy tip: when giving a co-ordinate, latitude (north or south) always precedes longitude (east or west). Latitude and longitude are divided in degrees (°), minutes (‘) and seconds (“).

parallels

## How do I get XY coordinates on Google Maps?

Get the coordinates of a place

1. On your computer, open Google Maps.
2. Right-click the place or area on the map.
3. Select the latitude and longitude, this will automatically copy the coordinates.

## How do I convert GPS coordinates to local coordinates?

Conversion between lat/lon and local coordinate system

1. Convert lat/lon values of the common point (X Y) and the another (unknown) point from lat/lon to X1 Y1 values.
2. Count the difference between X1 – X and Y1 – Y to get vertical and horizontal distances between common point and the original lat/lon values.

## How do I find map coordinates?

Get the coordinates of a place

1. On your Android phone or tablet, open the Google Maps app .
2. Touch and hold an area of the map that isn’t labeled. You’ll see a red pin appear.
3. You’ll see the coordinates in the search box at the top.

## What are the types of coordinates?

Common coordinate systems

• Number line.
• Cartesian coordinate system.
• Polar coordinate system.
• Cylindrical and spherical coordinate systems.
• Homogeneous coordinate system.
• Other commonly used systems.
• Relativistic coordinate systems.
• Citations.