geolocation

I tried searching but i couldn't find anything. My Question is " How can i alert 2 or more users if they are nearby each other? " in android using Geo-fencing or something else. Say, If a UserA is in football ground and UserB walking nearby that football ground. Then UserA and UserB automatically gets notification that UserA/UserB are somewhere nearby. Rafique Mohammed Finally after spending a couple of hours thinking, I thought a better way to do this: Setup a database (MySQL,SQL etc) in your server which have users table and location table which have the locations data In Android create a

The need I have is that a user (client) can put his/her address and to validate if it is within our delivery area. Currently I have designed this layer on google maps: https://www.google.com/maps/d/u/0/viewer?mid=1E3bcIm6Dy4icmTA4S-hEqOZeHpU What is the technology that I use? I just need an input text of a formulary to write the address and respond with an OK or a sorry. All the information that I find are questions and solutions to calculate routes and only need to verify an address within an area. Now I know as autofill and get save the address to verify. Now I just need to know how I can

I'm looking for a elegant solution that calculates the center between several latitude-longitude coordinates (for example, to simply center a map to the center of a google-maps polygon). Table: locations : id | city | latitude | longitude ----------------------------------------------- 1 | Berlin | 52.524268 | 13.406290 ----------------------------------------------- 2 | London | 51.508129 | -0.1280050 ----------------------------------------------- 3 | Hamburg | 53.551084 | 9.9936817 ----------------------------------------------- 4 | Amsterdam | 52.370215 | 4.8951678 ------------------------

From what I have read this takes some complicated Math that I am not good at. So, I am asking here. Does anyone have experience converting a MKMapPoint or CLLocationCoordinate2D to a UTM value? I found this resource ( http://www.uwgb.edu/dutchs/usefuldata/UTMFormulas.HTM ) but the math is overwhelming. You could use one lib to do that, or analyze the code of one lib to understand the algorithm and do it yourself. This is a c++ lib that does the job: http://geographiclib.sourceforge.net/html/ http://geographiclib.sourceforge.net/html/classGeographicLib_1_1UTMUPS.html I found this website (http:

I am looking to add a geolocation attribute to my "Candidate" Eloquent model. I want to find Candidates based on their location. For instance, find all Candidates within 20 miles of San Francisco. What should my Eloquent model look like to store a Candidate's location in the database? How do I query for Candidates based on their location? I am using Laravel 5.3. Personally, I have achieved this previously by storing a set of latitude and longitude coordinates. You can use something called the Haversine formula to calculate "as the crow flies" distance between a specified set of coordinates and

I've been playing around with React Native, getting custom locations to work and setting the "NSLocationWhenInUseUsageDescription" key. The error, when running on the ios simulator, is this: { "code": 2, "message": "Unable to retrieve location.", "PERMISSION_DENIED": 1, "POSITION_UNAVAILABLE": 2, "TIMEOUT": 3 } This is what I have, pretty much straight from the Geolocation example page https://facebook.github.io/react-native/docs/geolocation.html /* eslint no-console: 0 */ 'use strict'; var React = require('react'); var ReactNative = require('react-native'); var { StyleSheet, Text, View, } =

I'm trying to add coordinate information to my database, adding django.contrib.gis support to my app. I'm writing a south data migration that takes the addresses from the database, and asks Google for the coordinates (so far I think my best bet is to use geopy for this). Next I need to convert the returned coordinates from WGS84:4326 , Google's coordinate system, to WGS84:22186 , my coordinate system. I'm lost among the GeoDjango docs trying to find a way to do this. This far, I gather I need to do this: gcoord = SpatialReference("4326") mycoord = SpatialReference("22186") trans =

I'm having an issue plotting an RGB image using Python's Basemap module with latitude and longitude data. Now, I am able to make the plots that I want, but the problem is how slow it is, since it is able to plot single channel data much faster than the RGB data, and in general, plotting RGB images on their own is also fast. Since I have lat/lon data, that is where things get complicated. I've checked out the solution to this problem: How to plot an irregular spaced RGB image using python and basemap? which is how I got to where I am right now. It essentially comes down to the following issue.

I'm trying to test my app, which uses geolocation using the emulator. Several methods are described here . I'm going to Window->Open Perspective->DDMS , then entering lat. and long. one in Location Controls and then I hit "Send". But it doesn't work. Instead I see the following error: Unable to send command to the emulator. Why is this happening!? I don't think my app is the problem because I tested with the emulator's default browser and it also cannot access location info. Details: OSX 10.9.4 AVD_for_Nexus_4_by_Google targeting v4.4.2 Eclipse IDE for Android Developers 23.0.2.1259578 Update: