![]() Working worldwide, the app will also give WGS84 Latitude and Longitude values, and specify the current Hemisphere (Northern or Southern).Ī primary market for the app is the USA, so a handy guide to the United States UTM Zones is included in the application. Some of the history behind the military adoption of UTM and MGRS More than you probably want to know.UTM Grid Ref Compass gives a smartphone user their current position using the Universal Transverse Mercator (UTM) geographic coordinate system. Locating MGRS grid information on USGS topographic maps In one case this led to the rescue helicopter being sent 30 miles away from the actual incident. Usually by voice, to someone else who misinterpreted the coordinate format. There are several documented cases where a string of digits was passed, When communicating a coordinate by voice, say the words "meters East" after the Easting and "meters North" after the Northing. In the case of UTM, I suggest writing "m E" for "meters East" after the Easting, and "m N" for "meters North" after the Northing. You run the risk of having someone else misunderstand what coordinate format you are using. If you just run a bunch of digits together with no spacing or units, In the world of map coordinates, there are a lot of different coordinate formats. For more on this idea check out our page onįor improved clarity, write the measurement units with the Easting and Northing Using as many digits after the decimal point as we have measurement accuracy. One possible solution is to write the Easting an Northing in kilometers, Or if we just did a 100m rough measurement and the location could have an easting between 706100m E and 706199m E. The trouble is we don't know if the location we are measuring was located with great accuracy at 706100m E, So our easting becomes 706140m E or 706100m E. The convention is to fill in the unknown/unmeasured digits with zeros, and to avoid any rounding up. Hat would, in our example above, give it an Easting of 706146m E.īut on a large scale map, no tool will be able to measure to the nearest meter.Īt best you'll get 10 meters, and if you're eyeballing it you'll be good to get 100m accuracy.īut we still have to write all the digits down to the meter. Let's look at the Easting of a point that is 146m east of the western grid line. Using a map ruler to plot/measure a UTM position with 10m precision The precision of the Easting and Northing measurementsĪ UTM coordinate's Easting and Northing are both distance measurements made in meters.īut this leaves us with a dilemma when we have not measured with one meter precision. Using various tools to plot and measure UTM positions on a map The last 3 digits are the distance in meters measured from the southern grid line. Using a map with a 1000m grid, the first digits are come from the label for the grid line to the south of the position. Measurement of North-South position, within the Grid Zone, in meters. ![]() The bottom set of numbers, 4344683, represent a The last 3 digits are the distance in meters measured from the western grid line. Using a map with a 1000m grid, the first digits are come from the label for the grid line to the west of the position. Measurement of East-West position, within the Grid Zone, in meters. The top set of numbers, 706832, represent a Necessary to make the coordinates unique over the entire globe. The 10S is the Grid Zone Designation you are in. The two grid lines are 1000 meters apart. , reads "seven hundred and six thousand meters East." The label, Look along the bottom edge of the map at the labels for the vertical grid lines. The vertical grid lines determine East-West position and the horizontal grid lines determine North-South ![]() The grid is labeled with UTM coordinate values. The map has grid lines spaced every kilometer or 1000 meters. Set to display position in UTM/UPS format, would report a location of: Let's look at where the various parts of the UTM position come from on the map. Standing at the center of the marker shown on the map below, a GPS unit
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |