8/28/2023 0 Comments Convert lat long to xy![]() Ive seen this question tackled using ArcMap however I dont have that software. I would like to convert them to longitude latitude so they are more like -90.097017, 29.963176. However when I use that tool and put numbers I got into Google Maps, it pointed area where not even close to area A.Īnd this is lat and lng inside of area A, the format of expected numbers. Im working with this downloadable shapefile that has X Y coordinates. Converting coordinates from one datum to. At first I thought that those are map x and map y, because one time data source gave me that kinds of numbers and I had to find tool to convert it into lat and lng. The latitude and longitude on a map made against a local datum may not be the same as one obtained from a GPS receiver. ![]() lat, lng -18.088506124573, -44.907758947306 ulx, uly ansform (lng, lat) This can be used to create an affine object (a '2d linear mapping') that is used to transform cell coordinates to projected coordinates in metres. So, the numbers very strange, the area A supposed to have like lat 35.XXXXX and lng 127.XXXXX and what I got was something like x: 12834.6278 and y:3551.5214. lat/lon conversion to x/y-coordinates alexschnale August 18, 2010, 2:15pm 1 mmr August 18, 2010, 5:50pm 2 alexschnale August 20, 2010, 8:43am 3. Next step is to calculate the coordinate of the upper left coordinate array. I have to figure it out what is it and have to convert it into lat and lng that you can use it in Google Maps. I know there are several different values like map xy, so I think those are one of the Geographic coordinate system that I don't know. You now have your X and Y to plot on your image. note: when using negative longitude of latitude make sure to add or subtract the negative number i.e. I received some Excel files from a data source that supposed to contains some buildings' lat and lng in area A, and what I got was just have x and y (I don't know what does it mean). y (total height of image in px) (90 - longitude) / 180. The choice of projection depends on the intended use, and there is generally no single "best" projection even for specific uses.I'm new to GIS, and I have some tasks that have to work with lat and lng values. Convert X Y Coordinates To Latitude Longitude Points are measured using height and width relative to their container. They vary due to the varying goals of each projection. We can convert from Lng/Lat to XY Using the following: MapWidth and MapHeight 8192 x (LngX + 180) (mapWidth / 360) y (mapHeight / 2) - (mapWidth Math.Log (Math.Tan ( (Math.PI / 4) + ( (LatY Math.PI / 180) / 2))) / (2 Math. ![]() The general subject of map projection has many more solutions than the simplest identified here. For small enough areas, the scale is nearly constant over the whole figure and can be calculated once and held constant. For a large enough area that is not symmetric about the equator, this will make the length of the top edge in miles noticeably different from the bottom edge.Ī much better projection would map latitude to Y, but scale longitude by cos(latitude) to get X. As you move away from the equator, this will introduce a small distortion due to the decrease in the length of the degree of longitude as the latitude approaches either pole. That said, this is a reasonable question if the inputs are reasonable.įor very small areas near the equator, a simple projection is to map latitude to Y and longitude to X. Conversions to NATO coordinates are only done for. See wiki on geographic coordinates and map projections as starting places for general background. NOTE: UTM and NATO easting and northing values are rounded to the nearest meter. There is no single best projection from that large an area of the globe to a screen. That leaves out the band pole to pole from 170W to 169W, a disk around the north pole north of 80N, and a larger disk around the south pole south of 56S. Latitude and Longitude Converter Enter the latitude and longitude of a location and select convert to show results in DD (Decimal Degrees), DMS (Degrees Minutes Seconds), DMM (Degrees Decimal Minutes). The area requested covers almost the entire globe, from 80N 169W to 56S 190E. The question, as asked, is almost nonsensical.
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