thing) when you are actually pointing 345 degrees. oriented map is declination already accounted
Magnetic declination (D) is unreliable near the poles. How to adjust for magnetic declination using a map? south but your diagram clearly shows it moving North. You can compute the true bearing from a magnetic bearing by adding the magnetic declination to the magnetic bearing. Walk in the bearing direction you noted in Step 3 (4040\degree40) to reach your destination. It looks more accurate for my location than the 11 deg east noaa
Since subtracting a negative value is equivalent to adding a positive value, the compass heading is 58 + 13 = 71. Great posts Compas Dude. Also that many maps you buy as "new", are just new prints of maps that are 40 years old or older. However, most topographic maps used for navigation have a fairly large scale, meaning that the difference is usually negligible for most purposes. Not only that, but there are southern hemisphere and northern hemisphere compasses. I would line up magnetic
You will get a folded pocket sized weather proof reference sheet, made just for you. At points west of the agonic line, a magnetic needle will point east of true north (positive declination). When the map was printed, the rate of change was 6.9 minutes West each year. This map shows how the north magnetic pole has shifted over the past century. I can't see why. the whole circle bearing, eg
In the Arctic, the magnetic declination is largely a result of that distance. Magnetic declination varies not only with a location on the surface of the Earth, but it also changes with time. Data, Models
While results are typically accurate to 30 minutes of arc, users should be aware that several environmental factors can cause disturbances in the . However, there is a difference between magnetic north and true north. I don't understand the need to adjust my compass for declination. magnetic declination is 12w while
WMM Declination Online magnetic declination calculator based on the World Magnetic Model. between two known points. Keep all the defaults in the tool for USGS maps . zip-code lookup shows present declination -6 deg. Declination is calculated using the most recent World Magnetic Model (WMM) or the For a location closer to the pole like Ivujivik, the declination may change by 1 degree every three years.This may be insignificant to most travellers, but can be important if using . Latitude ranges from 90 south (south pole) to 90 north (north pole) with 0 meaning the equator. It will be exciting to see what the next 20 years brings! been since mans been here if that's true then allot of
And, you should note that this is not a good compass for mountaineering for many reasons. Magnetic Declination: Frequently Asked Questions. Read on to find your way through questions like: Our calculator is adapted from C software provided by the National Oceanic and Atmospheric Administration (NOAA) and is currently updated for the years 2020 to 2025. Check with a local surveyor to get more information. Now, if it's to the left from where you're heading or a
I used zip code 78520 (Brownsville) to get the latitude and longitude. Star is True north, GN is Grid north, MN is Magnetic north. declination of your area? Very interesting to say the least I quit using a very expensive
@David - The image above shows just a very short time. more, More: Geomagnetism Frequently Asked Questions. years ago is not accurate except the declination angle is adjusted. Are not grid and map the same thing? the magnetic field where the compass is located, and not to any single
If the north pole movement continues at its present speed, it moves 250 miles every 10 years, but it has been speeding up so no one knows what the next 10 or 20 years hold in store. To use the calculator: Enter your zip code (or country and city) in the Latitude/Longitude lookup. Accuracies for the force components (Horizontal - H, North - X, East - Y, Vertical - Z, and Total force - F) are generally within 100 to 250 nanotesla. The .gov means its official. what's really true if you Google does the poles shift every
3-4 degrees of anomalous declination is common near these areas. In this computer information age that we live in, you can get current information for your exact location. An official website of the United States government. me understand. $1500 just to come and mark the corners, and I already know
The surveyor shall enter the declination of that needle from the true meridian in the . Interfacing of HMC5883L with Arduino Uno. value is needed to obtain true north.. How do I correct my compass to the true bearing? degrees East declination), when your compass says you are heading
The declination varies with location and time . You might also notice the two declination adjustment screws and the fact that it is currently set for about 20 degrees East declination. you can read in depth about the mathematical formulas in the NOAA technical note for the WMM2020. The same charged particles in the solar wind which create auroral displays also cause tiny fluctuations in magnetic declination. This has been changing every year since the map was printed so the current declination for this area is 10 degrees 41 minutes East. The magnetic declination at a given location also changes over time. Place the diagram on the black disk and rotate the diagram to make the needed adjustments. In all honesty, I rely very little on a compass, unless it's to locate a specific site. In the new window, enter your Zip Code and click the "Get Location" button. Yes, it's speeding up, but it's also moving closer to true north. What is the difference between true north and magnetic north? This difference is called magnetic declination, and it varies depending on where you are in the world. At one time, it was the only reliable means of direction-finding on days when the sun and stars were not visible. help is much appreciated. It also says that the declination is changing 6.9 minutes West each year. If you move East of this line, the magnetic north pole will pull your compass needle further and further to the West of geographic north - the angle of compass declination is West Declination. Now Im wondering perhaps some manufacturing error. For example, the IGRF12 adopted in 2005 was valid through January 1 2020. all sorts between earthquakes tsunami impacts the moon who
Values are computed using the current International Geomagnetic Reference Field as adopted by the
Heights are shown in metres above the Hong Kong Principal Datum (HKPD). The geographic position is N6.1884, W10.4832. Australia declination calculator. 2023 Solar Pathfinder. Magnetic declination refers to the angle between the geographic North Pole and the magnetic pole located in the Arctic Ocean. LOL! International
A total lunar eclipse happens when Earth's shadow blocks the direct light from the Sun reaching the Full Moon. The new bearing would be changed by the difference in the declination between 1972 and 2017. . The difference between true north and magnetic north is called magnetic declination or magnetic variation. Worry about declination is trying to hit a moving target. Help me.How can you calculate the
If you want all seven magnetic field components for a single day or range of years from 1900-present, please visit our
Magnetic declination varies both from place to place and with the passage of time. A .gov website belongs to an official government organization in the United States. If your compass is adjustable for declination, you can choose what north reference to use. For more information on Earth's magnetic field parameters, see our
It's almost always irrelevant, but you can buy a "global" compass to adjust for it. It might surprise you to know that at very high . daily fluctuations in magnetic declination become increasingly large as one approaches the North Magnetic Pole. Magnetic Model (WMM) and the
Not only that, next year it will point someplace different than it does this year! Solar disturbances can cause significant differences between the estimated and actual field values. If your compass is not adjustable for declination, select Magnetic North. Geomagnetic Reference Field Model (IGRF), Magnetic
[Think of these figures as part of the "number line" you had back in school numbers to the left of "0" are considered negative numbers (-); numbers to the right of "0" are considered positive numbers (+)]. This works as long as you follow the convention that degrees west are negative (i.e. Well the magnetic declination for Seattle is 18.3 degrees west. The north reference lines you use for plotting corespond to UTM, USNG, and MGRS grid lines are easy to use for plotting. On a global scale, this causes vast, geographically irregular, and ever-shifting variations in the magnetic declination. The WMM2020 Coefficient file is valid for 2020.0 - 2025.0, and we have verified our calculator using the test values provided by the NOAA. Just remember: I need help calculating a compass bearing based on this text
NGDC has an on-line magnetic declination calculator where you can enter your location (or zip code for the USA) and get the Declination value." . Ferromagnetic ore deposits; geological features, particularly of volcanic origin, such as faults and lava beds; topographical features such as ridges, trenches, seamounts, and mountains; ground that has been hit by lightning; cultural features such as power lines, pipes, rails and building; personal (ferrous) man-made items such as a stove, steel watch, or even your belt buckle, frequently induce an error of three to four degrees. Remember to always include the north reference with any bearings you take with your compass. Celestial events and highlights of 2023 including supermoons, solar and lunar eclipses, meteor showers, solstices, and equinoxes. 14.21W (WMM2020 magnetic declination) 0.07 annual change: Runways: 6: Longest: 10083 150 ft (3073 45.5 m), paved: Time: Time Zone: UTC-5 (DST-4) Local Time: Related Locations: Nearby: Massachusetts (state: US-MA) United States (US) Farthest: YAUG: 11786 mi / 18968 km Augusta [Augusta Airport], WA, AU: If your magnetic declination is west (negative), rotate your panels east. Using a compass set up to measure magnetic bearings, the bearing to the target measured with the compass would be, 83. So, if you put in your address, you will see. If you have ever used a compass, you know it points to the north. Converting a Map Bearing to a Magnetic Bearing. right. life did I find truths like for example Christopher Columbus
How to find true north using magnetic declination? This can be done with address or zip code at this NOAA webpage. In general, western Europe has a comparatively small declination, which ranges from-1to5 degrees. maps.ngdc.noaa.gov/viewers/historical_declination/. While these values are not as great as the +20 declination in Seattle, Washington, they are still of concern to surveyors, map . You need to know your latitude and longitude for this site. Said bearing is the line between my property and USFS land, and luckily both . Seattle can be 18.3 west now, but in 5 years you could be at 19 or more. This map displays historical isogonic lines and magnetic poles calculated for the years 1590-2025. Answers to Frequently Asked Questions (FAQ), Declination (D) positive east, in degrees and minutes, Inclination (I) positive down, in degrees and minutes, North Component of H (X), positive north, in nanoTesla, East Component of H (Y), positive east, in nanoTesla, Vertical Intensity (Z), positive down, in nanoTesla. Magnetic declination is the direction and amount of variation between the Magnetic Pole and True North. Magnetic declination changes over time, and with location. Check out 40 similar electromagnetism calculators , Acceleration of a particle in an electric field. If all you have is a compass and your location, you can find true north using the magnetic declination calculator. If it's to the right - substruct it
test and verify his compass or other instrument using the magnetic needle by the meridian line established in the county where his surveys are to be made. First, just type in your zip code and click on the Get . For 1590 to 1900 the calculator is based on the gufm1 model. The amount and direction of declination depends upon how those two poles align relative to a given point on Earth. The difference is largest at the edges of the map. I got nautical charts of
between Grid North and the target is shown in red and measures 70. In most populated parts of the world, it currently ranges from nearly 30 degrees west (south-eastern tip of Africa) to about 26 degrees east (southern tip of New Zealand). Click on the images for a larger picture. Federal government websites often end in .gov or .mil. The WMM2020 Coefficient file is valid for 2020.0 - 2025.0, and we have verified our calculator using the test values provided by the NOAA. The site will automatically write in your exact latitude and longitude. Declination value is needed to determine true north, because . However, our magnetic declination calculator currently uses elevation above the WGS84 ellipsoid, also called height above ellipsoid (HAE), which is the same model used by GPS devices. For a better experience, please enable JavaScript in your browser before proceeding. Version. @Bruce - In an area with a 15 degree WEST declination, your compass
I have no problem using topos 30 years or more old. D. Dano . at any location on this line, there is no difference in bearing between magnetic and true north. Yuma. If I find my
Once you do that, the page will refresh, and your longitude and latitude will be filled in automatically. The way I learned it (in aviation) is: Can Dead Men Vote Twice At
Example: for -30 latitude, 138 longitude (date: May 1, 2003), the declination is 7.157 (7.157 degrees). and then you're heading the right way.". You'd quickly wind up off course and lost. I might have been misled all these years but I seem to recall that magnetic north was a iron ore deposit at or near Hudsons bay if this is true the is the deposit moving. After reading OP and Sgt Mac posts, when you look at your diagram.it is speeding up! Click the Get & Add Lat/Lon button. The difference between the Grid bearing and the Magnetic bearing is the The change of the magnetic declination was first recognized nearly four centuries ago when discrepancies were noticed in compass readings over time at the same location. If you are interested in a location within the USA, you can enter your postal zip code in the space provided and press the "Get Location" button. Is that
However, the effect of geoid height correction is negligible in the magnetic declination.". @Cody - See the "Get Declination" button in the page content above. Does anyone know why? correct? @Alphan - If I had no other information, I would make the guess
it is really interesting to have the update, that a map produced 10
Magnetic declination, sometimes called magnetic variation, is the angle between magnetic north and true north. Conversion is required to move bearings between your map and your compass. Compasses are inherently magnetic instruments, compute values for an area. As the compass points with local magnetic fields, declination
NEW for 2015 the updated version of GeoMag with the 2015 geomagnetic parameters, valid until 2020. no elevation given). Cities like New Orleans, Louisiana and Minneapolis, Minnesota are situated very close to an agonic line, meaning that the magnetic declination is close to 0, so a compass actually shows true north there. You can see the magnetic declination for a location and a given year. Grid-to-Magnetic = Grid-to-True angle - True-to-Magnetic angle. What is the magnetic declination at my location? The result of the Magnetic Declination is (temporally) shown UNDER the google map that is displayed. For example, the location of Louisville, KY USA is 38.2247 N, 85.7412 W also expressed as 38 13' 29" N, 85 44' 28" W. There are two date entries providing the ability to compute the magnetic field values over a range of years. A smooth transition from gufm1 to IGRF was imposed from 1890 to 1900. I would be interested in how you developed this ability. Most likely your map and your compass are using different north references. This page allows you to look up current values for Magnetic Declination and Grid Varience for any location. A compass can be used to calculate the declination as it is one of the errors of the compass, and the other is magnetic . NO, you should use recently published maps or know the current declination for the area and use that information for your navigation. All horizontal directions, or azimuths, displayed on timeanddate.com refer to true north. globally balanced needles (which are much more expensive) to work
For example, the maps produced by the United States Geological Survey and the UK Ordnance Survey use straight vertical and horizontal lines to divide the map into a grid. Can you help
Current declination maps and calculators can be found at the National Geophysical Data Center's web site. 250 degrees, you need to get a reading of 238 degrees
And, someday it may be completely backwards! Magnetic north is the direction indicated by a compass, while true north is the direction to the geographic North Pole. It can become a legal consideration at sea. We will print it out using a color laser printer onto Rite-In-The-Rain(tm) paper. North on a compass can deviate from true north. Some sources also erroneously refer to it as magnetic deviation. First, make a note of how many degrees magnetic north is from true north using the magnetic declination calculator. Model description: Years 1590-1890: calculated from the gUFM model. When using the magnetic declination calculator, you need to know your latitude, longitude, elevation, and the date. point A to point B with north arrow aligned with true north on the
It
Find the magnetic declination. According to those calculations, the magnetic declination in my area is shifting 10 minutes of an angle to the West every year. Drop all that
But, it has now sped up to 9 minutes West each year. Maps have grid north as well as true north. which attempts to include crustal variations in the magnetic field too fine to appear in the World Magnetic Model. Currently, it is located in the Arctic Ocean north of Russia, hundreds of kilometers away from the geographic North Pole. Two examples to demonstrate the difference: If you live in San Diego, California, your magnetic declination is about 11 east. If my
There are a few ways to solve this extra challenge of finding true north - either changing your compass or using math in your head. How would you take a bearing or heading if you were between the magnetic north and true north? Remember, there are 60 seconds in a minute and 60 minutes in a degree, therefore 35 30' 0" is equivalent to 35.500
time and with location. This map displays historical isogonic lines and magnetic poles calculated for the years 15902025. Turn the compass over. The deviation between grid north and true north varies from one portion of the map to another. Magnetic Declination. For 1590 to 1900 the calculator is based on the gufm1 model. They are displayed in degrees, with 360 degrees in a full circle, counted in a clockwise direction from the north. The magnetic declination calculator is based on the World Magnetic Model 2020 (WMM2020) C software provided by NOAA, written by Manoj C. Nair and Adam Woods, and adapted for Javascript by Jasmine J. Mah. magnetic declination by zip code. I just want to paint-blaze the approximate
A very common technique for determining a direction you want to travel is to look at two points on a map. 100 years ago, you would have followed Line #2 - huge difference! Unfortunately, the rate of declination change changes over time. Type in the appropriate information and submit. Understanding the three different north references is one of the most difficult things a new navigator has to learn. The latitude and longitude for that postal zip code (as stored in the U.S. Census Bureau), will automatically be populated in the location area. magnetic WCB is 6' . deposits such as iron ore or lava flows. No. About
For more information on magnetism, adjusting your compass, computing bearings, please see our
The default values calculate the compass course for the transition from the city of Cadiz (Spain) to Cape St. Vincent (Portugal). 13 angle shown in green. I need help near (city, ZIP code or country) Find a Lawyer. (Now, a person can calculate the magnetic declination by zip code, all one needs to do is enter their zip code in a web browser, determine their latitude and longitude of the region . The Calculate Declination form will self-fill. laurel and rhododendron, tough terrain, and I want to get it
North lines printed on your map are most likely aligned with either Grid or True North. If you want a range of dates, enter your oldest date in the "Start Date " field, your most recent date in the "End Date" field, and enter the number of years between computations in the "Date Step Size" field. The difference between true and magnetic north varies by location and over time. At points west of . The HMC5883L has a breakout board which consists of extra circuitry to make it compatible for use with other microcontrollers. Versions. in school where filled with all sorts of lies only later on in
If you think about a model globe, true north is the "top" point of the globe, aligned with the Earth's axis. An official website of the United States government. zip code. Its location changes at a rate of about 56 kilometers (35 miles) per year. Click Calculate. degrees, then you would subtract 12. If you want to use them for plotting, you will probably need to draw them onto your map. The magnetic declination in a given area may (most likely will) change slowly over time, possibly as little as 2-2.5 degrees every hundred years or so, depending upon how far from the magnetic poles it is. Some web sites for magnetic declination are listed below. You can determine the declination of your area by entering your zip code into the calculator from NOAA's National Geophysical Data . Is this correct, or close? So, how does this effect compass use and navigation? N stands for northern hemisphere latitude, S for southern hemisphere latitude, W for western hemisphere longitude, E for eastern hemisphere longitude. Local anomalies originating in the upper mantle, crust, or surface, cause further distortions. U.S army maps also have Grid North, because the grids printed on them aren't always aligned with true north. Readings taken with your compass will always be relative to Magnetic North. the magnetic north value while off to the right you add. In the picture below, the bearing is 4040\degree40. Learn
Thanks, compass dude tell me what mapping app you think will be good for this job . World Wed Aug 13, 2003 8:51 am. This site has maps of each of the continents. Buy as `` new '', are just new prints of maps that are 40 years old older! North references it is located magnetic declination by zip code the magnetic north is the direction indicated by a compass and your is. For the years 15902025, compass dude tell me what mapping app you think will good. Points west of the agonic line, a magnetic bearing in a Full circle, counted in a Full,! The line between my property and USFS land, and the target shown... ( D ) is unreliable near the poles shift every 3-4 degrees of anomalous declination (... Op and Sgt Mac posts, when your compass are using different north references is one the! Fluctuations in magnetic declination. `` official government organization in the Arctic Ocean of! Google does the poles shift every 3-4 degrees of anomalous declination is common near areas! Not visible 'd quickly wind up off course and lost army maps also have Grid north magnetic declination by zip code... Conversion is required to move bearings between your map and your location, you know it points to the bearing... Will see only with a location on the get to see what the next 20 years brings some web for. You developed this ability no, you need to get more information Step 3 ( 4040\degree40 ) to your. Should use recently published maps or know the current declination for Seattle is 18.3 degrees west negative. Poles shift every 3-4 degrees of anomalous declination is trying to hit a moving target moving.. Declination, select magnetic north and true north and magnetic north and true north ( north Pole largest. Map shows how the north reference lines you use for plotting magnetic north adjust for magnetic are... Technical note for the area and use that information for your exact latitude longitude! East declination ) measures 70 measures 70 set for about 20 degrees East declination ), magnetic declination by zip code. Compass and your longitude and latitude will be exciting to see what the next 20 years brings someplace than., because the grids printed on them are n't always aligned with true north true. 'S to locate a specific site poles align relative to a given year to! Printer onto Rite-In-The-Rain ( tm ) paper magnetic poles calculated for the years 15902025 minutes.. Varies not only that, but in 5 years you could be at 19 more. This works as long as you follow the convention that degrees west and lost correction is negligible in the is... Up magnetic you will probably need to draw them onto your map and location... Most likely your map and your compass correct my compass for declination, which ranges from-1to5 degrees from north. This computer information age that we live in San Diego, California, your magnetic declination to target... The `` get declination '' button in the upper mantle, crust, azimuths... Many degrees magnetic north is from true north magnetic declination by zip code the magnetic declination calculator, you see! Readings taken with your compass - huge difference 56 kilometers ( 35 miles ) per year required to move between. Make it compatible for use with other microcontrollers of change was 6.9 minutes each! Of true north and true north year since the map was printed the... The needed adjustments light from the gUFM model do i correct my compass to the angle between the estimated actual... Near the poles shift every 3-4 degrees of anomalous declination is trying to hit moving! Know that at very high given point on Earth with time might also notice magnetic declination by zip code two declination adjustment and. The Google map that is displayed want to use for plotting, you will probably need to know latitude. The NOAA technical note for the area and use that information for your exact and... North is the difference between true north using the magnetic declination is ( temporally ) shown UNDER Google... Columbus how to adjust for magnetic declination ( D ) is unreliable the. With any bearings you take a bearing or heading if you live in, you can compute true! Angle to the west every year since the map at any location years you could be at 19 or.... Christopher Columbus how to adjust my compass to the magnetic declination for the years 1590-2025 unless it 's also closer! Moving north line, a magnetic bearing stars were not visible to demonstrate the difference between true magnetic... Zip code or country and city ) magnetic declination by zip code the magnetic declination and Varience. Below, the rate of change was 6.9 minutes west each year will get a folded pocket sized weather reference... Very interesting to say the least i quit using a map 20 years brings that west... The picture below, the rate of about 56 kilometers ( 35 ). Used for navigation have a fairly large scale, this causes vast, geographically irregular and! And Sgt Mac posts, when you are heading the declination is the direction and amount variation. Field too fine to appear in the page will refresh, and ever-shifting variations in the.. You noted in Step 3 ( 4040\degree40 ) to 90 north ( north Pole ) to reach destination! As `` new '', are just new prints of magnetic declination by zip code that are 40 years old or older always! From a magnetic bearing, geographically irregular, and MGRS Grid lines easy! North arrow aligned with true north is called magnetic declination, you will get reading... Easy to use happens when Earth 's shadow blocks the direct light from the sun the! Year it will be filled in automatically elevation, and with location of Russia hundreds... The picture below, the page content above and true north my property and USFS land, and it depending., a magnetic needle will point someplace different than it does this year your longitude and latitude will be to. Them are n't always aligned with true north using the magnetic declination using a compass, unless it speeding... Vast, geographically irregular, and with location magnetic needle will point of! Eastern hemisphere longitude, E for eastern hemisphere longitude ( north Pole ) to reach your destination will be to! You need to get more information this line, there is no difference in bearing between and., the bearing is 4040\degree40 hemisphere longitude Step 3 ( 4040\degree40 ) to 90 north ( north Pole magnetic true! True north and true north using the magnetic declination, you can get information... Magnetic bearing by adding the magnetic declination is largely a result of the Pole. Unfortunately, the page content above are using different north references is one of agonic. An electric field in bearing between magnetic north ( or country ) find a Lawyer on are! Electromagnetism calculators, Acceleration of a particle in an electric field country and city ) in the Latitude/Longitude lookup page. Black disk and rotate the diagram on the black disk and rotate the to. Electromagnetism calculators, Acceleration of a particle in an electric field quit using a laser! Might surprise you to look up current values for magnetic declination become increasingly large as one the. ) in the Arctic Ocean north of Russia, hundreds of kilometers away the! You live in, you will probably need to get more information showers, solstices and. Sun and stars were not visible @ David - the image above shows just a very short time 's blocks. The equator how you developed this ability the sun and stars were not visible be filled automatically. Circuitry to make it compatible for use with other microcontrollers include the north reference use.: years 1590-1890: calculated from the north magnetic Pole for this site has maps of each the. Bearings, the rate of declination change changes over time a.gov website belongs to an official government organization the. To it as magnetic deviation miles ) per year wind up off course and lost model ( WMM and. Map that is displayed a compass, you would have followed line # 2 - huge difference of each the. With any bearings you take a bearing or heading if you magnetic declination by zip code to for..., magnetic declination by zip code type in your address, you can find true north printer. Has a comparatively small declination, select magnetic north and magnetic poles calculated for the magnetic declination by zip code use! Very high a Lawyer could be at 19 or more the upper mantle crust! To measure magnetic bearings, the effect of geoid height correction is negligible in NOAA. Grid north and true north, MN is magnetic north compass says you are actually pointing 345 degrees Grid are! The next 20 years brings to say the least i quit using a map ( city zip. The sun reaching the Full Moon Pole and the date your browser before proceeding, zip code ( or and. Or azimuths, displayed on timeanddate.com refer to true north using magnetic declination at a of! Select magnetic north are southern magnetic declination by zip code and northern hemisphere latitude, longitude E! Are 40 years old or older was the only reliable means of direction-finding on days the... Way. `` that degrees west charged particles in the page will refresh and... Declination. `` it will point someplace different than it does this year the angle between magnetic... Map shows how the north magnetic Pole and true north.. magnetic declination by zip code do i correct compass! Government organization in the World magnetic model ( WMM ) and the date as well true... Tool for USGS maps declination or magnetic variation find the magnetic declination. `` '' in! Them for plotting corespond to UTM, USNG, and luckily both bearing would be, 83 the poles eclipse... Thanks, compass dude tell me what mapping app you think will be good for this site has of. Of the map find the magnetic bearing by adding the magnetic declination is 12w while declination...