haversine

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Using the Haversine formula with PostgreSQL and PDO

On my site I\'m trying to get locations nearby. I\'m trying to use the Haversine formula for this. http://en.wikipedia.org/wiki/Haversine_formula[详细]

2023-03-26 18:31 分类：问答
SQL Distance Query without Trigonometry

I have an SQLite database, which does not support trig functions.I would like to sort a set of la开发者_运维问答t,lng pairs in my table by distance as compared to a second lat,lng pair.I\'m familiar w[详细]

2023-03-16 22:25 分类：问答
C, Calculating the distance between two GPS locations?

If I have two GPS locations, say 51.507222, -0.1275 and 48.856667, 2.350833, what formula could I use to calculate the distance between the two? I\'ve heard a lot about a haversine formula, but can\'t[详细]

2023-03-01 11:50 分类：问答
How to measure distance using Haversine formula with MySQL?

I get Latitude and Longitudes from Google Maps Reverse-Geocoding API and then I need something like this:[详细]

2023-02-07 23:39 分类：问答
google maps API geocode finds nearby KML

I\'ve seen a number of people ask about this on Google Maps discussion groups to productive discussion, so I thought I would try here.[详细]

2023-02-05 17:53 分类：问答
Mysql Recursive Query / Spherical Law of Cosines

I want to search nearest locations from coordinates (lat/lng) into mysql database, I use spherical law of cosines to searching these places :[详细]

2023-02-02 02:34 分类：问答
How to transform a distance from degrees to metres?

I\'m using OpenLayers with an ordinary mercator map and I\'m trying to sample a bounding box by finding a grid of points in latlong.[详细]

2023-01-23 20:09 分类：问答
Doubts in converting spherical coordinates

I\'m trying to convert spherical coordinates (namely latitude and longitude from a GPS device) into Cartesian coordinates. I\'m following this simple conversion derived from the polar coordinates conv[详细]

2023-01-12 18:53 分类：问答
Distance between two locations isn't right

I have used the algorithm on http://www.movable-type.co.uk/scripts/latlong.html to find the distance between two points.[详细]

2023-01-08 00:17 分类：问答
Calculate compass heading to a CLLocation - Haversine functions for iOS

I understand how to get the distance between 2 CLLocations. I need to determine the generalized compass bearing (N, NE, E etc.) from a CLLocation to another CLLocation.[详细]

2023-01-06 13:33 分类：问答