latitude-longitude

How to sort array items by longitude latitude distance in javascripts?

故事扮演 提交于 2019-11-27 20:22:17
问题 I am having following JSON array of 6 locations. Is there any way sort these based on longitude and latitude where nearby locations come next in the array? [ {"id" : 279, "longitude":79.853239,"latitude":6.912283}, {"id" : 284, "longitude":79.865699,"latitude":6.885697}, {"id" : 13, "longitude":79.851187,"latitude":6.912220}, {"id" : 282, "longitude":79.858904,"latitude":6.871041}, {"id" : 281, "longitude":79.853346,"latitude":6.899757}, {"id" : 16, "longitude":79.854786,"latitude":6.894039}

how to get lat and long from sdo_geometry in oracle

[亡魂溺海] 提交于 2019-11-27 19:30:18
问题 how can i get lat and long from point in oracle? Like this: MDSYS.SDO_GEOMETRY(2001,4326,NULL, MDSYS.SDO_ELEM_INFO_ARRAY(1,1,1), MDSYS.SDO_ORDINATE_ARRAY(51.702814,32.624736)) 回答1: The notation you show is not the best one for representing single 2D or 3D points. The common and most efficient way to encode those points is this: SDO_GEOMETRY(2001,4326,SDO_POINT_TYPE(51.702814,32.624736,NULL),NULL,NULL) All the GIS tools I have seen use this notation. The one you show is valid too - it just

Android - How to get current location (latitude and longitude)?

◇◆丶佛笑我妖孽 提交于 2019-11-27 19:27:56
I am using the following code to get the current location namely (latitude and longitude), but I am not getting current location (latitude and longitude). Anyone knows why? package com.ram.currentlocation; import android.app.Activity; import android.content.Context; import android.location.Location; import android.location.LocationListener; import android.location.LocationManager; import android.os.Bundle; import android.widget.Toast; public class Location_Gps extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super

How to get bounds of a google static map?

心已入冬 提交于 2019-11-27 18:51:17
How to get bounds in degrees of google static map which has been returned, for example, for following request http://maps.googleapis.com/maps/api/staticmap?center=0.0,0.0&zoom=10&size=640x640&sensor=false As I know, full Earth map is 256x256 image. This means that n vertical pixels contain x degrees, but n horizontal pixels contain 2x degrees. Right? As google says center defines the center of the map, equidistant from all edges of the map. As I understood equidistant in pixels (or in degrees?). And each succeeding zoom level doubles the precision in both horizontal and vertical dimensions. So

Convert Latitude and Longitude to point in 3D space

 ̄綄美尐妖づ 提交于 2019-11-27 18:24:23
I need to convert latitude and longitude values to a point in the 3-dimensional space. I've been trying this for about 2 hours now, but I do not get the correct results. The Equirectangular coordinates come from openflights.org . I've tried several combinations of cos and sin , but the result did never look like our little beloved earth. In the following, you can see the result of applying the conversion Wikipedia suggests. I think one can guess from context what c4d.Vector is. def llarToWorld(latit, longit, altid, rad): x = math.sin(longit) * math.cos(latit) z = math.sin(longit) * math.sin

Check if a latitude and longitude is within a circle

北慕城南 提交于 2019-11-27 17:54:15
See this illustration: What I would like to know is: How to create an area (circle) when given a latitude and longitude and the distance (10 kilometers) How to check (calculate) if a latitude and longitude is either inside or outside the area I would prefer if you can give me code example in Java or specifically for Android with Google Maps API V2 flx What you basically need, is the distance between two points on the map: float[] results = new float[1]; Location.distanceBetween(centerLatitude, centerLongitude, testLatitude, testLongitude, results); float distanceInMeters = results[0]; boolean

How to find my distance to a known location in JavaScript

牧云@^-^@ 提交于 2019-11-27 17:54:00
Using JavaScript in the browser, how can I determine the distance from my current location to another location for which I have the latitude and longitude? Frank van Puffelen If your code runs in a browser, you can use the HTML5 geolocation API: window.navigator.geolocation.getCurrentPosition(function(pos) { console.log(pos); var lat = pos.coords.latitude; var lon = pos.coords.longitude; }) Once you know the current position and the position of your "target", you can calculate the distance between them in the way documented in this question: Calculate distance between two latitude-longitude

Function to calculate geospatial distance between two points (lat,long) using R [duplicate]

可紊 提交于 2019-11-27 17:49:19
This question already has an answer here: Geographic / geospatial distance between 2 lists of lat/lon points (coordinates) 2 answers Calculate distance between two latitude-longitude points? (Haversine formula) 36 answers I have geocoded points in long, lat format, and I want to calculate the distance between them using R. This seems pretty straight forward, yet I can't find a function that will do it easily. I've been attempting to do it with the gdistance package, but it seems very convoluted and oriented to graphing, I just need a number. Something like distanceBetween(pointA,pointB) that

SQL Query for Performing Radius Search based on Latitude Longitude

北城余情 提交于 2019-11-27 17:21:29
We have a restaurant table that has lat-long data for each row. We need to write a query that performs a search to find all restaurants within the provided radius e.g. 1 mile, 5 miles etc. We have the following query for this purpose: ***Parameters*** Longitude: -74.008680 Latitude: 40.711676 Radius: 1 mile ***Query*** SELECT * FROM restaurant WHERE ( POW( ( 69.1 * ( Longitude - -74.008680 ) * cos( 40.711676 / 57.3 ) ) , 2 ) + POW( ( 69.1 * ( Latitude - 40.711676 ) ) , 2 ) ) < ( 1 *1 ); The table has about 23k rows. The size of the result set is weird at times e.g. for a 5.4 mile search, it

Move the annotation on Map like Uber iOS application

自闭症网瘾萝莉.ら 提交于 2019-11-27 17:11:10
I am working on a project where I need to create the similar iOS application to UBER and OLA where the car is moving based on the location. I'm looking for some kind of Library which can make Cars move and take turn smoothly just like OLA. For now I was able to move car from one latitude-longitude to another. But the complex part is how to turn and make sure the car face to front when moving to direction. Please find the below screenshot for the same. Actually I had also one requirement in my previous iOS application, so please find the below url for download the code and review it. Link for