How to extract JSON string with commas? - javascript

I have JSON data:
"geometry":{"type":"Point","coordinates":[95.9174,3.8394,59]},"id":"us10002b0v"
I need to extract each value in coordinates which is comma separated. In PHP I would do extract(",",$geometry[coordinates]);. Is there any possible in JavaScript to do so?
Source Json from here : http://earthquake.usgs.gov/earthquakes/feed/geojsonp/2.5/week
This is my code :
google.maps.event.addDomListener(window, 'load', function() {
map = new google.maps.Map(document.getElementById('map-canvas'), {
center: { lat: 7.8, lng: 98.3},
zoom: 4,
styles: mapStyle
});
map.data.setStyle(styleFeature);
infowindow = new google.maps.InfoWindow({
content: '<div class = "corp" style="width: 260px; height: 200px">' + '</div>'
})
//InfoWindow
var infowindow = new google.maps.InfoWindow();
google.maps.event.addListener(map,'click',function() {
infowindow.close();
});
map.data.addListener('click', function(event) {
var place = event.feature.getProperty('place');
var mag = event.feature.getProperty('mag');
var depth = event.feature.getProperty('geometry');//I need the depth from this line which is arrayed
var link = event.feature.getProperty('url');
var jsonTime = event.feature.getProperty('time');
var humanTime = new Date('jsonTime');
infowindow.setContent('<div><h3>'+place+'</h3><p>Mag: '+mag+'<br />Depth '+depth+'<br />Time : '+humanTime+'<br />More</p></div>');
infowindow.setPosition(event.feature.getGeometry().get());
infowindow.setOptions({pixelOffset: new google.maps.Size(0,-30)});
infowindow.open(map);
});

Yes, you can get them as array values:
var my_json = '{"geometry":{"type":"Point","coordinates":[95.9174,3.8394,59]},"id":"us10002b0v"}';
var my_obj = JSON.parse(my_json);
var lat = my_obj.geometry.coordinates[0];
var lng = my_obj.geometry.coordinates[1];
console.log( lat ); //95.9174
console.log( lng ); //3.8394

You could use
var myObject = JSON.parse("<your-json-string>");
This will parse your JSON into a JavaScript object which you can traverse in the usual way.

Related

Iteration in Javascript doesn't run [duplicate]

I scraped data from Json and containing arrays in queryLat/queryLng after that I create another function initMap also bind it to google script. But I having hard to time passing queryLat and queryLng into initMap. "queryLat is not defined" pops up. How I can pass those to initMap.
var queryLat = [];
var queryLng = [];
#foreach($estates as $est)
var result = $.getJSON({
url: 'https://maps.googleapis.com/maps/api/geocode/json?address={{$est->address}}&key={{env('GOOGLE_MAPS_API')}}'
});
result.done(function(data) {
queryLat = data.results[0].geometry.location.lat;
queryLng = data.results[0].geometry.location.lng;
});
#endforeach
function initMap()
{
var options =
{
zoom : 10,
center : {lat:34.652500, lng:135.506302}
}
var map = new
google.maps.Map(document.getElementById("map"), options);
for (var i = 0; i < queryLat.length; i++)
{
var newMarker = new google.maps.Marker
({
position: {lat: queryLat[i], lng: queryLng[i]} ,
map: map
});
}
}
For multiple markers if you are defining arrays globally then you have to push your lat and long values in array and also need to update the marker variable to display diferent markers.. Hope it helps you to get the multiple markers.
var queryLat = [];
var queryLng = [];
#foreach($estates as $est)
var result = $.getJSON({
url: 'https://maps.googleapis.com/maps/api/geocode/json?address={{$est->address}}&key={{env('GOOGLE_MAPS_API')}}'
});
result.done(function(data) {
queryLat.push(data.results[0].geometry.location.lat);
queryLng.push(data.results[0].geometry.location.lng);
});
#endforeach
function initMap()
{
var options =
{
zoom : 10,
center : {lat:34.652500, lng:135.506302}
}
var map = new
google.maps.Map(document.getElementById("map"), options);
for (var i = 0; i < queryLat.length; i++)
{
var new_marker_str = "newMarker"+i;
new_marker_str = new google.maps.Marker
({
position: {lat: queryLat[i], lng: queryLng[i]} ,
map: map
});
}
}
You Should define your variables queryLat and queryLng globally where your script starts.
<script type="text/javascript">
var queryLat;
var queryLng;
#foreach($estates as $est)
var result = $.getJSON({
url: 'https://maps.googleapis.com/maps/api/geocode/json?address={{$est->address}}&key={{env('GOOGLE_MAPS_API')}}'
});
result.done(function(data) {
queryLat = data.results[0].geometry.location.lat;
queryLng = data.results[0].geometry.location.lng;
});
#endforeach
function initMap()
{
var options =
{
zoom : 12,
center : {lat:34.652500, lng:135.506302}
}
var map = new
google.maps.Map(document.getElementById("map"), options);
var marker = new
google.maps.Marker
({
position: {lat: queryLat, lng: queryLng},
map: map
});
}
The problem is in this code:
url: 'https://maps.googleapis.com/maps/api/geocode/json?address={{$est->address}}&key={{env('GOOGLE_MAPS_API')}}'
You have enclosed the string with apostrophes, but the string contains apostrophes too.
Use this instead:
url: "https://maps.googleapis.com/maps/api/geocode/json?address={{$est->address}}&key={{env('GOOGLE_MAPS_API')}}"

Google Map Marker not working when from DB

I'm starting to learn Google Map. It's strange that when statically declared, markers are working and being displayed, but when they come from DB, they aren't being drawn on map.
// var markers = [[15.054419, 120.664785, 'Device1'], [15.048203, 120.692186, 'Device 2'], [15.033303, 120.694611, 'Device 3']];
var markers = [];
I have the entire code here, maybe I am missing something? I even used console log and I successfully pass all data from ajax to markers variable.
I think I got this code somewhere here in SO and modified it to fit in for my DB calls for records. I hope you can help me out on this one. Thank you!
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script src="https://maps.googleapis.com/maps/api/js?v=3.exp&sensor=false&callback=initialize"></script>
<script type="text/javascript">
var map;
var global_markers = [];
// var markers = [[15.054419, 120.664785, 'Device1'], [15.048203, 120.692186, 'Device 2'], [15.033303, 120.694611, 'Device 3']];
var markers = [];
var infowindow = new google.maps.InfoWindow({});
function initialize() {
geocoder = new google.maps.Geocoder();
var latlng = new google.maps.LatLng(15.058607, 120.660884);
var myOptions = {
zoom: 10,
center: latlng,
mapTypeId: google.maps.MapTypeId.ROADMAP
}
map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
$.ajax({
type: 'GET',
url: 'control_panel/get_device_list_ajax',
success:
function (data) {
data = JSON.parse(data);
if (data['success']){
var device = data['device_list'];
device.forEach(function (dev) {
markers.push([dev['dev_geolat'], dev['dev_geolng'], dev['dev_name']]);
//console.log(markers);
});
addMarker();
} else {
}
}
});
}
function addMarker() {
console.log(markers);
for (var i = 0; i < markers.length; i++) {
// obtain the attribues of each marker
var lat = parseFloat(markers[i][0]);
var lng = parseFloat(markers[i][1]);
var trailhead_name = markers[i][2];
var myLatlng = new google.maps.LatLng(lat, lng);
var contentString = "<html><body><div><p><h2>" + trailhead_name + "</h2></p></div></body></html>";
var marker = new google.maps.Marker({
position: myLatlng,
map: map,
title: "Coordinates: " + lat + " , " + lng + " | Trailhead name: " + trailhead_name
});
marker['infowindow'] = contentString;
global_markers[i] = marker;
google.maps.event.addListener(global_markers[i], 'click', function() {
infowindow.setContent(this['infowindow']);
infowindow.open(map, this);
});
}
}
window.onload = initialize;
</script>
EDIT
Here is the jsfiddle I used to work with this one http://jsfiddle.net/kjy112/ZLuTg/ (thank you to the one that lead me to this)
Could be related to the way you accessing to json rendered by ajax
markers.push([dev.dev_geolat, dev.dev_geolng, dev.dev_name]);
or the json content
I don't know how to close this question as I overlooked some problems on my DB but I'll be posting my answer if someone may come with the same problem (well, I am not sure about that hehe)
I get the same response from AJAX of the values in DB and I am not able to draw markers on MAP, I found that db->table->fields LAT LNG are referenced with a data type of DECIMAL (7,5) and changed it to FLOAT (10, 6) as to what is found in this GOOGLE MAP Tutorial - Using PHP/MySQL with Google Maps.
The issue at the field before was that higher values tend to be saved as 99.999999 instead of the actual value (e.g. 120.XXXXX) .

Google Map Markers not displaying in MVC

I am trying to render Google map with Latitude and Longitude from my MVC Model by using different examples. Google Map is displaying fine but it is not displaying the markers. I am very new to the Google Maps and feeling completely clueless about it. Can please anyone tell me how I can get the markers?
My MVC view is as follow
if (Model.WidgetType == "Map")
{
<div class="experienceRestrictedText">
<script src="//maps.google.com/maps/api/js?sensor=false&callback=initialize" type="text/javascript"></script>
<script type="text/javascript">
function initialize() {
var London = new google.maps.LatLng(#Html.Raw(Json.Encode(Model.UserLatitude)), #Html.Raw(Json.Encode(Model.UserLongitude)));
// These are options that set initial zoom level, where the map is centered globally to start, and the type of map to show
var mapOptions = {
zoom: 14,
center: London,
mapTypeId: google.maps.MapTypeId['ROADMAP']
};
var map = new google.maps.Map(document.getElementById("map"), mapOptions);
$.get("/Home/GetMapLocations", function(data){
$.each(data, function(i, item){
var marker = new google.maps.Marker({
'position' : new google.maps.LatLng(item.Latitude, item.Longitude),
'map' : map,
'title': item.EngineerName
});
});
});
#*var data = #Html.Raw(Newtonsoft.Json.JsonConvert.SerializeObject(Model.lstMapLocations));
$.each(data, function (i, item){
var marker = new google.maps.Marker({
'position' : new google.maps.LatLng(item.Latitude, item.Longitude),
'map' : map,
'title': item.EngineerName
});
});*#
}
</script>
<div class="map" id="map" style="width:690px; height:400px;"></div>
</div>
}
MVC Controller is as follow
public ActionResult GetMapLocations()
{
var lstMapLocations = new List<MapLocation>();
var mapLocationModel1 = new MapLocation
{
EngineerName = "Engineer1",
SiteName = "Site1",
Latitude = 51.507351,
Longitude = -0.127758,
LstDouble = new List<double>()
};
var mapLocationModel2 = new MapLocation
{
EngineerName = "Engineer2",
SiteName = "Site2",
Latitude = 51.481728,
Longitude = -0.613576,
LstDouble = new List<double>()
};
var mapLocationModel3 = new MapLocation
{
EngineerName = "Engineer3",
SiteName = "Site3",
Latitude = 51.628611,
Longitude = -0.748229,
LstDouble = new List<double>()
};
var mapLocationModel4 = new MapLocation
{
EngineerName = "Engineer4",
SiteName = "Site4",
Latitude = 51.26654,
Longitude = -1.092396,
LstDouble = new List<double>()
};
lstMapLocations.Add(mapLocationModel1);
lstMapLocations.Add(mapLocationModel2);
lstMapLocations.Add(mapLocationModel3);
lstMapLocations.Add(mapLocationModel4);
foreach(var item in lstMapLocations)
{
item.LstDouble.Add(item.Latitude);
item.LstDouble.Add(item.Longitude);
item.LatLong = item.LstDouble.ToArray();
}
return Json(lstMapLocations);
}
I have found a work around to my problem and thought to share it for those who may stumble upon a similar issue. Courtesy stack overflow post particularly the answer posted by Atish Dipongkor. There may well be a better alternative to this problem but this approach has resolve my problem. I have made little change in that answer as Atish has used apostrophes while retrieving data from model which can break the functionality if any of the model field has string data with apostrophe in it. My appended solution with the above dummy data (in my question) is as follow
<div class="experienceRestrictedText">
<script src="//maps.google.com/maps/api/js?sensor=false&callback=initialize" type="text/javascript"></script>
<script type="text/javascript">
function initialize() {
var London = new google.maps.LatLng(#Html.Raw(Json.Encode(Model.UserLatitude)), #Html.Raw(Json.Encode(Model.UserLongitude)));
// These are options that set initial zoom level, where the map is centered globally to start, and the type of map to show
var mapOptions = {
zoom: 8,
center: London,
mapTypeId: google.maps.MapTypeId['ROADMAP']
};
var map = new google.maps.Map(document.getElementById("map"), mapOptions);
#foreach (var item in Model.lstMapLocations)
{
<text>
var markerLatLong = new google.maps.LatLng(#(item.Latitude), #(item.Longitude));
var markerTitle = #Html.Raw(Json.Encode(item.EngineerName));
var markerContentString = #Html.Raw(Json.Encode(item.EngineerName)) + " At " + #Html.Raw(Json.Encode(item.SiteName));
var infowindow = new google.maps.InfoWindow({
content: markerContentString
});
var marker = new google.maps.Marker({
position: markerLatLong,
title: markerTitle,
map: map,
content: markerContentString
});
google.maps.event.addListener(marker, 'click', (function (marker) {
return function () {
infowindow.setContent(marker.content);
infowindow.open(map, marker);
}
})(marker));
</text>
}
}
</script>
<div class="map" id="map" style="width:690px; height:400px;"></div>
</div>

Google Maps API: Markers from XML file not being displayed

Using code that was posted on here, I'm trying to map markers from an XML file to a Google Map in a JSP using the Google Maps Javascript API V3.
My markers file has the following format:
<markers>
<marker>
<id>0</id>
<lat>53341428</lat>
<lng>-6246720</lng>
<name>Fenian Street</name>
<number>63</number>
</marker>
<marker>
<id>1</id>
<lat>53346637</lat>
<lng>-6246154</lng>
<name>City Quay</name>
<number>99</number>
</marker>
And the code is:
<script type="text/javascript">
function load() {
var map = new google.maps.Map(document.getElementById("map"), {
center: new google.maps.LatLng(53.3430347, -6.2550587),
zoom: 14,
mapTypeId: 'roadmap'`enter code here`
});
var infoWindow = new google.maps.InfoWindow;
downloadUrl( "markers.xml", function(data) {
var xml = data.responseXML;
var markers = xml.documentElement.getElementsByTagName("marker");
for (var i = 0; i < markers.length; i++) {
//var id = markers[i].getElement("id");
var id = markers[i].getElementsByTagName("id")[0];
var point = new google.maps.LatLng(
parseFloat(markers[i].getElementsByTagName("lat")[0]),
parseFloat(markers[i].getElementsByTagName("lng")[0]));
var name = markers[i].getElementsByTagName("name")[0];
//var number = markers[i].getElementsByTagName("number");
var html = "<b>" + id + "</b> <br/>" + name;
var image = 'img.png';
//var icon = customIcons[type] || {};
var marker = new google.maps.Marker({
position: point,
map: map,
title: name,
icon: image
});
marker.setMap(map);
bindInfoWindow(marker, map, infoWindow, html);
}
});
}
function bindInfoWindow(marker, map, infoWindow, html) {
google.maps.event.addListener(marker, 'click', function () {
infoWindow.setContent(html);
infoWindow.open(map, marker);
});
}
function downloadUrl(url, callback) {
var request = window.ActiveXObject ?
new ActiveXObject('Microsoft.XMLHTTP') :
new XMLHttpRequest;
request.onreadystatechange = function () {
if (request.readyState === 4) {
request.onreadystatechange = doNothing;
callback(request, request.status);
}
};
request.open('GET', url, true);
request.send();
}
function doNothing() {
}
</script>
When I load the page, I see an error in he console: InvalidValueError: setTitle: not a string
What am I doing wrong? The markers are not appearing on the map.
You are getting that error because "name" is not a string, it is an XML DOM object. There is a function nodeValue that can be used to get the string content out of an XML DOM element.
Also, your latitude and longitude are not valid, they are not in decimal degrees.
function load() {
var map = new google.maps.Map(document.getElementById("map"), {
center: new google.maps.LatLng(53.3430347, -6.2550587),
zoom: 14,
mapTypeId: 'roadmap'
});
var infoWindow = new google.maps.InfoWindow;
// downloadUrl( "markers.xml", function(data) {
// var xml = data.responseXML;
var xml = xmlParse(xmlString);
var markers = xml.documentElement.getElementsByTagName("marker");
for (var i = 0; i < markers.length; i++) {
//var id = markers[i].getElement("id");
var id = nodeValue(markers[i].getElementsByTagName("id")[0]);
var point = new google.maps.LatLng(
parseFloat(nodeValue(markers[i].getElementsByTagName("lat")[0])),
parseFloat(nodeValue(markers[i].getElementsByTagName("lng")[0])));
var name = nodeValue(markers[i].getElementsByTagName("name")[0]);
//var number = markers[i].getElementsByTagName("number");
var html = "<b>" + id + "</b> <br/>" + name;
var image = 'img.png';
//var icon = customIcons[type] || {};
var marker = new google.maps.Marker({
position: point,
map: map,
title: ""+name /*,
icon: image */
});
marker.setMap(map);
bindInfoWindow(marker, map, infoWindow, html);
}
// });
}
where nodeValue was "borrowed" from geoxml3:
//nodeValue: Extract the text value of a DOM node, with leading and trailing whitespace trimmed
function nodeValue (node, defVal) {
var retStr="";
if (!node) {
return (typeof defVal === 'undefined' || defVal === null) ? '' : defVal;
}
if(node.nodeType==3||node.nodeType==4||node.nodeType==2){
retStr+=node.nodeValue;
}else if(node.nodeType==1||node.nodeType==9||node.nodeType==11){
for(var i=0;i<node.childNodes.length;++i){
retStr+=arguments.callee(node.childNodes[i]);
}
}
return retStr;
};
working fiddle

Simple html dom get value from javascript

Is it possible to get javascript var by using Simple html dom or are there other options?
<script type="text/javascript">
function initialize() {
var latlng = new google.maps.LatLng(11.80991, 1.98722);
var myOptions = {
zoom: 15,
center: latlng,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
include('simple_html_dom.php');
// Retrieve the DOM from a given URL
$html = file_get_html('url');
I want the lat and lng when i parse the url by Simple Html Dom. Is that possible?
I'm not sure what you're looking for. But maybe it's this:
function initialize() {
var latlng = new google.maps.LatLng(11.80991, 1.98722);
var lat = latlng.lat();
document.getElementById('lat').innerHTML = "Latitude: " + lat;
var lang = latlng.lng();
document.getElementById('lang').innerHTML = "Longitude: " + lang;
//Both:
document.getElementById('both').innerHTML = "Lat/Long: " + latlng;
}
window.onload = initialize();
JsFiddle

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