Grey square - 187 448. Red dot - 185 443. To be sure there is no doubt or confusion about which National Grid you're referring, when you quote the six-figure grid reference you should put the two letters of the area you are in before the numbers. For example, you may be at grid reference '509 582' in south-west Scotland. 3. Read using method #1. Usually, military grid maps contain 6 digit grid coordinates, but this is not always the case. Here is how to read grid references, regardless of the number of digit coordinates present. Read the figures from left to right. This means you will read the figures along the Eastings lines. Determine the Grid Coordinates of a Point on a Military Map Performance Measures. 1. Write down the two-letter 100,000-meter square identifier and the six?digit grid coordinates for the designated point with a 100?meter tolerance. 2. Record the grid coordinates with the correct two-letter 100,000-meter square identifier. There are a few ways to show the coordinate grids on Google Earth. The easiest way to show the coordinate grids in Google Earth is to select " Grids " from the " Tools " options. Then you will have full zoomable coordinates grid cover (Pic 1 - 3). Pic. 1 - 3 The WGS-84 coordinate grids provided by Google Earth with details depending 6 and 8-digit grids: The most commonly used formats in a local setting. Scale - 1:25,000 1,000-meters 06 23 24 07 06 07 Reading USNG Grid Coordinates. - Coordinates are always given as an even number of digits (i.e. 23370651). 6° x 8° Grid Zone Designations (GZD). Example: 18S GZDs are further subdivided into large squares with After you determined a set of eight-digit grid coordinates, you find out that they have to be changed to six-digit grid coordinates. What would the six-digit grid coordinate be after you convert the eight-digit grid coordinate, YD43141275? Identify the 100,000 square meter designator; read right; read up; combine these steps. Grid Coordinates-Divide the earth's surface into 6-degree by 8-degree quadrangles. covered with 100,000 meter squares. Grid Lines. Are regularly spaced lines that run north-south and east-west on a map -These grid lines intersect at 90 degrees to form a grid square -The lines that form grid squares are numbered along outside edge of the map. UTM grid coordinates are expressed as a distance in meters to the east, referred to as the "easting", and a distance in meters to the north, referred to as the "northing". For example 4282000 mN. becomes 82. Because pilots and sailors navigate over much greater distances they still favor the latitude longitude coordinate system. Note how the 10-digit value ends in 19 (2337106519) but the 8-digit grid ends in 2 (i.e., 20). To achieve best accu-racy with less precision, 19 is rounded to 20 for 8-digit use (23370652 vs. 23370651) rather than use a truncation of the digits. In the following example depicted in Figure 2, the Jefferson Pier is described 8 digits - 23480647 - locates a point with a precision of 10-meters (the size of a modest home). 10 digits - 2348306479 - locates a point with a precision of 1-meter (within a parking spot). In the following example, the Washington Monument is described as being located at grid 23480647 (think 2348 / 0647). aB3ul1.

8 digit grid coordinate example