# Tagged Questions

The process of determinating absolute or relative locations of points by measurement of distances

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### Differences between triangulation and trilateration?

Looking around I noticed that many people interchange the terms (triangulation and trilateration) for the same sense. What is the correct sense of Triangulation and what are the differences from ...
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### How can I use ArcGIS 10.1 to find a geodesic equidistant point defined by three points?

For example, I have coordinates for three base points on a coastline and I need to find the coordinates of the point off the coast which is equidistant from all three. It’s a simple exercise in ...
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### Iterating a model to create 3 buffers around three points and find their intersection (trilateration) in arcgis 10 [duplicate]

This past summer I recorded the location of a large number of plants I was working with by calculating the distance from each plant to each of 3 tripods for which I have GPS coordinates. I'm trying to ...
2k views

### Multilateration Code

I am currently writing some code to do multilateration using TDOA and currently struggling and wondering if anyone has any reference code that can be used as a test case with some sample data that I ...
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### Converting from an x-y coordinate system to latitude/longitude

I'm building an indoor wifi-based tracking system that can calculate the position of a device in meters relative to the sensors distributed throughout the building. So far I've gotten to the point ...
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### Plotting points that have relative coordinates rather than total station coordinates on map?

I have about +100 points of various descriptions from an archaeological survey. They are the backlog from years of excavations BEFORE systematically using Total Station at the site. For each artifact ...
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### Trilateration on a Sphere, given 2 points and 2 distances

Given the points: A) N 38° 38.000 W 90° 20.000 B) N 38° 39.000 W 90° 21.000 (I can calculate the distance between the 2 using a spherical earth model as 7710 feet, though it's not particularly ...
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### Trilateration with error account or lack of precision

I am developing a node.js/javascript application where I would have dozens of beacons in a row (positions known), which gives me their distances to specific object (3 or 4 distances per object). The ...
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### Given distances from two locations how to accurately find geographic coordinates [duplicate]

I am working on a research problem which requires me to calculate a geographic location accurately (with error distance of few meters), given distances from two geographic locations. For instance: ...
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### Trilateration 3D - Vincenty's Formula

with reference to Trilateration using 3 latitude and longitude points, and 3 distances. The accepted answer was votes as shown in wikipedia at: http://en.wikipedia.org/wiki/Trilateration in ...
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### localization by trilateration ( weighted nonlinear least squares )

I am writing an app for beacon localization and I am looking for a formula which, given beacons of known positions and distance from target, finds the target position. eg. given beacon1 located at (...
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### Long range Trilateration from 3 lat, long, range

I've been looking at the following solution to a similar problem Trilateration using 3 latitude and longitude points, and 3 distances However with my problem the 3 points are spread over a large ...
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### walk me through tdoa [closed]

I'm working on a TDOA application. This is just something in my free time to see if my hardware can accurately do it and it sounded like a cool challenge. Regardless if it looks possible or not, I'm ...
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What is the method used by wikipedia to solve Trilateration problem, is it the Linear Least Square? or is it just a direct solution of a set of linear equation systeme with exact distance? but in this ...
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### Set of intersection points in trilateration / multilateration [duplicate]

Like in this post I will get a set of points (3 or more) with latitude, longitude and distance (in KM) information to find out the target location. A distance could be about 500 KM. The circles (...
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### Calculate an intersection point of multiple spheres on the surface of earth [duplicate]

The question i am going to ask is very much similar to this question-How to calculate the intersection of 2 Circles? But the problem here is, the radius of the spheres are too small (within 8 meter). ...
746 views

### Trilateration using 3 x,y points and 3 distances, all in cm [closed]

I want to find out the position (x,y) of a given point, knowing the distance from 3 x,y points. Below you can view the x,y coordinates and their given distances in cm. B1x = 795 B1y = 332 B1d = 245....
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### Trilateration using two or three points

We have a positioning system where we can measure our range without 0.1m from multiple beacons. The placement of the beacons is about on a 1-2km box. So we could get anywhere from 2-4 ranges from ...
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### Pure html based indoor navigation

I would like to locate (position) people inside buildings without forcing them to download a native app. I'm focusing on iOS and Android devices. I therefore thought about wifi triangulation (...
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### Trilateration Math Check

I'm trying to crate an indoor trilateration program working off of N BLE objects. Where I have any number of beacons in a room and my ipad can track its location within them to a sub meter degree of ...
624 views

### Trilateration issue

My program isn't making use of any geographical data, but I'm hoping that the users experience in the subject can help me with my current issue. The project I am working is trying to locate a user in ...
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### Math algorithm for n amount points in objective-c

I need some information about the Answer on an earlier Question. I need this calculation for an iOS App. I have three points with different Circles. I understand the problem and your solution. But i ...
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### How does the radius work in Trilateration

I've been trying to understand the trilateration algorithm based on the wikipedia article. As of now, I have a system where I have the distance of 3 sensors wrt my position and i have the exact GPS ...
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### Trilateration algorithm for n amount of points in R?

I read the page Trilateration algorithm for n amount of points and I have to do similar kind of trilateration in R. I am not that expert in R, can anyone help, if there is similar function/package ...
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### Bilateration using longitude, latitude

I have 2 coordinates (Longitude and Latitude) and a distance from them to a third coordinate. How is it possible to calculate the longitude and latitude (probably 2 possibilities) of the third ...