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. Note countries using imperial units often print maps 1:24000, metric countries usually 1:2500 for a similar map.Standing at the center of the marker shown on the map below, a GPS unit Smaller compasses just have a English and metric ruler, often with the inch ruler graduated in tenths or twentieths and leave you to do the math. It’s got a clinometer in the compass vial. It’s the sunnato with a clear baseplate significantly larger than the compass and a folding mirror. The compass can also be used as a protractor, I think it’s an MC2. My Sunnato compass has a ruler divided 20 parts to the inch on one side with a mileage scale on the other, with a kilometer on the bottom-the latter two calibrated for 1:24000, and the inch rule is ideal for measuring distances in a 1:24000 map, but you can’t claim it’s calibrated for any single scale. You can buy 1/10 rules for engineering, machining and architectural use- engineering scales come 20 parts to the inch also- each part is 100’. Measure the distance, shift the decimal point 3 places, and double the number. This is the most common map scale used by hikers, engineers, foresters, geologists, wildland firefighters, etc in the continental US.Īny ruler graduated in 1/10” will work also, each 1/10 is 200’. I have several such “ devices”- I don’t recall if any are protractors as well. But not sure why you are having trouble finding one graduated for 1:24000. But I’m pretty comfortable doing math in my head. I’d be willing to make the corrections when needed. Uaing a 1:25000 scale instead of a 1:24000, would cause you would be off by 4%. One cubit on the map is 24000 cubits the ground. 1inch on the map is 24000 inches on the ground. You were OK until you said:”So for simplicity sake, 1=24000 in inches is 1" in real world is 24,000 feet on the map.”ġ:24000 is a ratio.
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