Some are optimised for particular regions. There are many different ways to do projections. To convert between them, you need to 'project' the spherical coordinates onto the flat map. Map X and Y coordinates exist on a (theoretically) flat map. Lat/Lon, UTM, UPS, MGRS, USNG, GARS, Plus Codes, what3words, Georef, Maidenhead, and State Plane are supported. A user account is not needed for the features on this web page. The utm converted latitude number looks roughly close but the longitude number is way off. Latitudes and longitudes exist on a spherical globe. USA Topo Map Other Help Convert Coordinates - Calculate a position in a variety of formats. I have tried a python based utm conversion of my lat,longs which goes something like this: utm.from_latlon(25.77,-80.21) Looking at the contents of the shape file this region is roughly at a y,x coordinate of 292000, 8930000. The shape file was generated by the US government and I doubt it has any peculiar definitions (details below).Īs an example, a point in Miami, Florida has real lat,long of 25.77,-80.21. I found the findtransformation function, but dont know how to use as inputs (the insr and outsr, for instance). So a js function might look like this: function getCoordsOfNextPoint( firstPoint, nextPoint, prevXY = Ĭonst x1y1 = secondPointXYCoords = getCoordsOfNextPoint(myFirstPoint, mySecondPoint)Ĭonst x2y2 = secondPointXYCoords = getCoordsOfNextPoint(myFirstPoint, mySecondPoint, x1y1)Ĭonst x3圓 = vsecondPointXYCoords = getCoordsOfNextPoint(myFirstPoint, mySecondPoint, x2y2)Īnd you could write a loop to read your latlng points from an array and write to another array of xy points, which will basically translate your latlng points to xy points.I'm trying to figure out where a given latitude, longitude coordinate should appear on a particular shape file. Therefore, I need to convert my lat,long to XY. If point 2 is 1.4km away from point 1, with a bearing of 32 degrees, point 2's xy coords can be calculated with some simple trig: ( 1400 * cos(32), 1400 * sin(32) ). If you find that point 2 is 35m away from point 1, with a bearing of 90 degrees, you know that the xy coordinates of point 2 would be (0,35), assuming `(0,0) for point 1. What is a unit of x / y? 1 meter? 1 km? Lets say we that 1 unit of x or y is equal to 1 meter. Now you need to pick your units of x and y. Once you have the bearing and the distance, you've basically turned this into a 2D cartesian coordinates problem. I am hoping to use a known benchmark and then g. Then you need a distance formula, to get the distance on the surface of the globe between the two points. Was given some well locations that have been located in the field via GPS Have a map that shows the wells in the 'wrong' location The map is not georeferenced, or in any coordinate system would like to convert the lat/long to a simple xy coordinate. ive searched this forum to see how I can convert LAT/LONG values to XY coordinates. You can get that from turf.js, a powerful GIS calculation library. Make a Shortcut to this Calculator on Your Home Screen In the UTM coordinate system a grid is used to specify locations on. You need the bearing, which is the angle from point 1 point 2 on the surface of the globe. Let posY = earthRadius * s(latRad) * Math.sin(lonRad) Let posX = earthRadius * s(latRad) * s(lonRad) I've tried the following but it doesn't work: function convertSphericalToCartesian(latitude, longitude) I am doing a JavaScript application that requires the movement of a certain element in a real world map, in frames.įor each frame, I have the following positions in latitude and longitude for the element, for example for frame 0:įrame (Frame 0) needs to be point (0,0) and I want the following ones to be converted to XY coordinates as well.īasically, I need a JavaScript script that receives the latitude and longitude of a frame and returns the position (x,y) for that frame (in relation to frame 0 with position (0,0)). convert x y coordinates to latitude longitude If you want to get more accurate, then you need to deal with the translation between a curved surface (lat/lon.
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