I am new to openlayers and a beginner to javascript, but I have tried for 3 days and nights now. My code seems okay but there is something I am missing out and just can’t figure it out
I have this problem, I can’t find my geometric points on my map.
My code goes thus:
//html
<!doctype html>
<head>
<title> Me OpenStreetMap </title>
<link rel="stylesheet" href="../assets/ol3/css/ol.css" type="text/css" />
<link rel="stylesheet" href="../assets/ol3/css/samples.css" type="text/css" />
</head>
<body>
<div id="map"></div>
<script src="../assets/ol3/js/ol.js"></script>
<script>
// style for geometric layer
var meStyle = new ol.style.Circle({
radius: 20,
fill: new ol.style.Fill({
color: '#ff9900',
opacity: 1
}),
stroke: new ol.style.Stroke({
color: '#ffcc00',
opacity: 1
})
});
// geometric layer
var geoLayer = new ol.layer.Vector({
source : new ol.source.Vector({
projection : 'EPSG:3857',
url : '../data/json.json',
format: new ol.format.GeoJSON(),
style: meStyle
})
});
// create layer
var osmLayer = new ol.layer.Tile({
source : new ol.source.OSM()
});
// create view
var yaounde = new ol.proj.transform([11.5653, 3.86617],
'EPSG:4326', 'EPSG:3857'
);
var view = new ol.View({
center: yaounde,
zoom: 15
});
// create map
var map = new ol.Map({
target: 'map'
});
map.addLayer(osmLayer, geoLayer);
map.setView(view);
</script>
</body>
</html>
//geojson
{"type":"FeatureCollection",
"features":
[
{"type":"Feature","properties":{"Name":"","Description":""},"geometry":{"type":"Point","coordinates":[0.0,0.0]}},
{"type":"Feature","properties":{"Name":"1","Description":""},"geometry":{"type":"Point","coordinates":[11.50728,3.87471,0.0]}},
{"type":"Feature","properties":{"Name":"2","Description":""},"geometry":{"type":"Point","coordinates":[11.5072,3.8759,0.0]}},
{"type":"Feature","properties":{"Name":"3","Description":""},"geometry":{"type":"Point","coordinates":[11.5032,3.87556,0.0]}},
{"type":"Feature","properties":{"Name":"4","Description":""},"geometry":{"type":"Point","coordinates":[11.50291,3.87552,0.0]}},
{"type":"Feature","properties":{"Name":"5","Description":""},"geometry":{"type":"Point","coordinates":[11.50278,3.87573,0.0]}},
{"type":"Feature","properties":{"Name":"6","Description":""},"geometry":{"type":"Point","coordinates":[11.50316,3.87621,0.0]}},
{"type":"Feature","properties":{"Name":"7","Description":""},"geometry":{"type":"Point","coordinates":[11.50347,3.87611,0.0]}},
{"type":"Feature","properties":{"Name":"8","Description":""},"geometry":{"type":"Point","coordinates":[11.50314,3.8763,0.0]}},
{"type":"Feature","properties":{"Name":"9","Description":""},"geometry":{"type":"Point","coordinates":[11.50325,3.87652,0.0]}},
{"type":"Feature","properties":{"Name":"10","Description":""},"geometry":{"type":"Point","coordinates":[11.50356,3.87558,0.0]}},
{"type":"Feature","properties":{"Name":"11","Description":""},"geometry":{"type":"Point","coordinates":[11.5033,3.87564,0.0]}},
{"type":"Feature","properties":{"Name":"12","Description":""},"geometry":{"type":"Point","coordinates":[11.50397,3.87586,0.0]}},
{"type":"Feature","properties":{"Name":"13","Description":""},"geometry":{"type":"Point","coordinates":[11.50299,3.87641,0.0]}},
{"type":"Feature","properties":{"Name":"14","Description":""},"geometry":{"type":"Point","coordinates":[11.50279,3.8771,0.0]}},
{"type":"Feature","properties":{"Name":"15","Description":""},"geometry":{"type":"Point","coordinates":[11.50269,3.87723,0.0]}},
{"type":"Feature","properties":{"Name":"16","Description":""},"geometry":{"type":"Point","coordinates":[11.50258,3.87722,0.0]}},
{"type":"Feature","properties":{"Name":"17","Description":""},"geometry":{"type":"Point","coordinates":[11.49122,3.8738,0.0]}},
{"type":"Feature","properties":{"Name":"18","Description":""},"geometry":{"type":"Point","coordinates":[11.48567,3.87447,0.0]}},
{"type":"Feature","properties":{"Name":"19","Description":""},"geometry":{"type":"Point","coordinates":[11.48548,3.88107,0.0]}},
{"type":"Feature","properties":{"Name":"20","Description":""},"geometry":{"type":"Point","coordinates":[11.48526,3.8812,0.0]}},
{"type":"Feature","properties":{"Name":"21","Description":""},"geometry":{"type":"Point","coordinates":[11.48614,3.88044,0.0]}},
{"type":"Feature","properties":{"Name":"22","Description":""},"geometry":{"type":"Point","coordinates":[11.48638,3.88033,0.0]}},
{"type":"Feature","properties":{"Name":"23","Description":""},"geometry":{"type":"Point","coordinates":[11.48641,3.88053,0.0]}},
{"type":"Feature","properties":{"Name":"24","Description":""},"geometry":{"type":"Point","coordinates":[11.4868,3.88029,0.0]}},
{"type":"Feature","properties":{"Name":"25","Description":""},"geometry":{"type":"Point","coordinates":[11.48772,3.87994,0.0]}},
{"type":"Feature","properties":{"Name":"26","Description":""},"geometry":{"type":"Point","coordinates":[11.4887,3.88057,0.0]}},
{"type":"Feature","properties":{"Name":"27","Description":""},"geometry":{"type":"Point","coordinates":[11.48869,3.88057,0.0]}},
{"type":"Feature","properties":{"Name":"28","Description":""},"geometry":{"type":"Point","coordinates":[11.48868,3.8807,0.0]}},
{"type":"Feature","properties":{"Name":"29","Description":""},"geometry":{"type":"Point","coordinates":[11.4888,3.88071,0.0]}},
{"type":"Feature","properties":{"Name":"30","Description":""},"geometry":{"type":"Point","coordinates":[11.49206,3.8775,0.0]}},
{"type":"Feature","properties":{"Name":"31","Description":""},"geometry":{"type":"Point","coordinates":[11.49251,3.87748,0.0]}},
{"type":"Feature","properties":{"Name":"32","Description":""},"geometry":{"type":"Point","coordinates":[11.4923,3.87783,0.0]}},
{"type":"Feature","properties":{"Name":"33","Description":""},"geometry":{"type":"Point","coordinates":[11.49273,3.87822,0.0]}}
]
}
The OpenStreet map appears by I can’t find the points
It is very simple to solve:
map.addLayer(osmLayer);
map.addLayer(geoLayer);
The addLayer method accepts a layer, only one. A working demo with your code.
I am using Google Maps in the Corona SDK, but I am having problems while the map is loaded. It's not zooming or is not clearly visible, just like below:
Here is my code block which is in HTML file:
<!DOCTYPE html>
<html>
<head>
<style type="text/css">
html,
body {
height: 100%; margin: 0; padding: 0 ;
}
#mapContainer {
height: 100% ;
}
</style>
<script type="text/javascript" src="<script type="text/javascript"
src="http://maps.googleapis.com/maps/api/js?key=]]..APIkey..[[&sensor=true"></script>
</head>
<body>
<div id="mapContainer">
</div>
<div id="mapContainer">
</div>
<script type="text/javascript">
var mapContainer = $( "#mapContainer" );
map = new google.maps.Map(
mapContainer[ 0 ],
{
zoom: 20,
center: new google.maps.LatLng(
-22.902145,
-43.177049
),
mapTypeId: google.maps.MapTypeId.ROADMAP
}
);
function addMarker( latitude, longitude, label ){
var im = "http://www.robotwoods.com/dev/misc/bluecircle.png"
var marker = new google.maps.Marker({
map: map,
position: new google.maps.LatLng(
latitude,
longitude
),
icon: im
});
return( marker );
}
function updateMarker( marker, latitude, longitude, label ){
marker.setPosition(
new google.maps.LatLng(
latitude,
longitude
)
);
if (label){
marker.setTitle( label );
}
}
if (navigator.geolocation) {
var locationMarker = null;
navigator.geolocation.getCurrentPosition(
function( position ){
if (locationMarker){
return;
}
locationMarker = addMarker(
position.coords.latitude,
position.coords.longitude,
"Initial Position"
);
},
function( error ){
},
{
timeout: (5 * 1000),
maximumAge: (1000 * 60 * 15),
enableHighAccuracy: true
}
);
var positionTimer = navigator.geolocation.watchPosition(
function( position ){
updateMarker(
locationMarker,
position.coords.latitude,
position.coords.longitude,
"Updated / Accurate Position"
);
}
);
setTimeout(
function(){
navigator.geolocation.clearWatch( positionTimer );
},
(1000 * 60 * 5)
);
var uri
if(]]..chk..[[)
uri ="http://192.168.1.202/streetculture/images/1/img1.png"
var image = new google.maps.MarkerImage(uri,
new google.maps.Size(50, 70),
new google.maps.Point(0,0),
new google.maps.Point(20, 28)
);
]]..markerString..[[
if(]]..chk2..[[)
uri ="http://192.168.1.202/streetculture/images/1/img_map_pin_pink.png"
var image = new google.maps.MarkerImage(uri,
new google.maps.Size(50, 70),
new google.maps.Point(0,0),
new google.maps.Point(20, 28)
);
]]..markerString..[[
}
</script>
</body>
</html>
I am loading this HTML file in my web view.
I have solve this problem ,
we need to put
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
for mobile device for webpage
Can anyone tell my why the contents of my InfoWindows are spilling out? When I view the InfoWindows in the Fusion Table UI, they all pop up and resize themselves correctly:
https://www.google.com/fusiontables/embedviz?q=select+col7+from+15wosKAeHC0gcpU_N6UPbxPL09RrEBKlQNEaCmnU&viz=MAP&h=false&lat=34.199813229302734&lng=-111.2955847411987&t=1&z=8&l=col7&y=2&tmplt=2
But when I try to use the html code to create a webpage, some (not all) of the InfoWindow contents spill out:
<!DOCTYPE html>
<html>
<head>
<title>CaveCreek - Google Fusion Tables</title>
<style type="text/css">
html, body, #googft-mapCanvas {
height: 300px;
margin: 0;
padding: 0;
width: 500px;
}
</style>
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
function initialize() {
google.maps.visualRefresh = true;
var map = new google.maps.Map(document.getElementById('googft-mapCanvas'), {
center: new google.maps.LatLng(34.199813229302734, -111.2955847411987),
zoom: 8,
mapTypeId: google.maps.MapTypeId.ROADMAP
});
map.controls[google.maps.ControlPosition.RIGHT_BOTTOM].push(document.getElementById('googft-legend'));
layer = new google.maps.FusionTablesLayer({
map: map,
heatmap: { enabled: false },
query: {
select: "col7",
from: "15wosKAeHC0gcpU_N6UPbxPL09RrEBKlQNEaCmnU",
where: ""
},
options: {
styleId: 2,
templateId: 2
}
});
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>
</head>
<body>
<div id="googft-mapCanvas"></div>
</body>
</html>
My dynamic template InfoWindow code looks like:
{template .contents}
<div>
<div style="align: center">
<b>{$data.value.Stream}</b>
</div>
{if $data.value.y2012}
2012-{/if}
{if $data.value.y2012a}
2012a-{/if}
...
</div>
{/template}
I have tried to add height and width to the div tag for the InfoWindow in the template but that still doesn't seem to work.
Remove the visualRefresh, that is causing the infoWindow size to be calculated incorrectly.
google.maps.visualRefresh = true;
Note that the Google Maps visual refresh is going to be the default soon, so removing it is not a long-term solution.
If you set the height of the div and add overflow-y: scroll you should get a scrollbar on your content; does that not happen? One of the examples in the dynamic template help is setting the height differently based on fields being there or not, so that might help.
I have written a Google Fusion Tables script I'm happy with (below), but it's loading only 500 rows of points in my table, which has over 20,000 rows. This is my first time in this neighborhood and I was really surprised to find the limit. Is there some way to load all the rows?
<!doctype html>
<html class="no-js" lang="en">
<head>
<meta charset="utf-8">
<meta content="IE=edge,chrome=1" http-equiv="X-UA-Compatible">
<title>Points in box</title>
<link href="./stylesheets/example.css" media="screen" rel="stylesheet" type="text/css" />
<link rel="shortcut icon" href="/images/favicon.ico" />
<noscript><meta http-equiv="refresh" content="0;url=/no_javascript.html"></noscript>
<!-- Find box coordinates javascript -->
<script type ="text/javascript" src="http://www.movable-type.co.uk/scripts/latlon.js"></script>
<!-- Type label text javascript -->
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script type="text/javascript" src="./js/label.js"></script>
<!-- Visulization javascript -->
<script type="text/javascript" src="http://www.google.com/jsapi"></script>
<!-- Initialize visualization -->
<script type="text/javascript">
google.load('visualization', '1', {});
</script>
</head>
<body class="developers examples examples_downloads examples_downloads_points-in-box examples_downloads_points-in-box_index">
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js" type="text/javascript"></script>
<script type="text/javascript">
var store_table = 4121905;
//send a call to GViz to retrieve lat/long coordinates of the stores
function getStoreData() {
//set the query using the input from the user
var queryText = encodeURIComponent("SELECT Latitude,Longitude,Impressions FROM " + store_table);
var query = new google.visualization.Query('http://www.google.com/fusiontables/gvizdata?tq=' + queryText);
//set the callback function
query.send(doLoop);
}
function drawBox(topleftx, toplefty, bottomrightx, bottomrighty) {
var bounds = new google.maps.LatLngBounds(
new google.maps.LatLng( topleftx, toplefty ),
new google.maps.LatLng( bottomrightx, bottomrighty )
);
var overlay = new google.maps.Rectangle({
map: carto_map,
bounds: bounds,
strokeColor: "#0000ff",
strokeOpacity: 0.20,
strokeWeight: 2,
fillColor: "#0000ff",
fillOpacity: 0.050,
});
}
function doLoop(response) {
numRows = response.getDataTable().getNumberOfRows();
//Basic
var cartodbMapOptions = {
zoom: 7,
center: new google.maps.LatLng( 37.926868, -121.68457 ),
// center: new google.maps.LatLng( 40.7248057566452, -74.003 ),
// disableDefaultUI: true,
mapTypeId: google.maps.MapTypeId.ROADMAP
}
// Init the map
carto_map = new google.maps.Map(document.getElementById("map"),cartodbMapOptions);
for(i = 0; i < numRows; i++) {
var centerX = response.getDataTable().getValue(i,0);
var centerY = response.getDataTable().getValue(i,1);
var imps = response.getDataTable().getValue(i,2);
var centerPoint = new LatLon(centerX,centerY);
var latLng = new google.maps.LatLng(centerX,centerY);
var toplefty = centerPoint.destinationPoint(-45, 6)._lon;
var topleftx = centerPoint.destinationPoint(-45, 7.7)._lat;
var bottomrighty = centerPoint.destinationPoint(135, 6)._lon;
var bottomrightx = centerPoint.destinationPoint(135, 7.7)._lat;
drawBox(topleftx, toplefty, bottomrightx, bottomrighty);
var marker = new google.maps.Marker({
position: latLng,
draggable: false,
markertext: imps,
flat: true,
map: carto_map
});
var label = new Label({
map: carto_map,
position: latLng,
draggable: true
});
label.bindTo('text', marker, 'markertext');
marker.setMap(null);
}
}
$(function() {
getStoreData();
});
</script>
<div id="map"></div>
</body>
</html>
I solved the problem by using the json call method. Code below.
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>David's Build Up</title>
<link href="./stylesheets/example.css" media="screen" rel="stylesheet" type="text/css" />
<link rel="shortcut icon" href="/images/favicon.ico" />
<noscript><meta http-equiv="refresh" content="0;url=/no_javascript.html"></noscript>
<!-- Find box coordinates javascript -->
<script
src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js">
</script>
<script type ="text/javascript" src="http://www.movable-type.co.uk/scripts/latlon.js"></script>
<!-- Type label text javascript -->
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script type="text/javascript" src="./js/label.js"></script>
<!-- Visulization javascript -->
<script type="text/javascript" src="http://www.google.com/jsapi"></script>
<!-- Initialize visualization -->
<script type="text/javascript">
google.load('visualization', '1', {});
</script>
<script type="text/javascript">
function drawBox(topleftx, toplefty, bottomrightx, bottomrighty) {
var bounds = new google.maps.LatLngBounds(
new google.maps.LatLng( topleftx, toplefty ),
new google.maps.LatLng( bottomrightx, bottomrighty )
);
var overlay = new google.maps.Rectangle({
map: carto_map,
bounds: bounds,
strokeColor: "#0000ff",
strokeOpacity: 0.20,
strokeWeight: 2,
fillColor: "#0000ff",
fillOpacity: 0.050,
});
}
function initialize() {
// Set the map parameters
var cartodbMapOptions = {
zoom: 5 ,
center: new google.maps.LatLng( 40.313043, -97.822266 ),
mapTypeId: google.maps.MapTypeId.ROADMAP
}
// Initialize the map
carto_map = new google.maps.Map(document.getElementById("map"),cartodbMapOptions);
// Query to grab the data
var query = "SELECT Latitude, Longitude, Impressions FROM " +
'[encrypted table ID here]';
var encodedQuery = encodeURIComponent(query);
// Construct the URL to grab the data
var url = ['https://www.googleapis.com/fusiontables/v1/query'];
url.push('?sql=' + encodedQuery);
url.push('&key=AIzaSyAm9yWCV7JPCTHCJut8whOjARd7pwROFDQ');
url.push('&callback=?');
// Set the number of rows
var numRows = 3500;
// Get the variables from the table, in a loop
$.ajax({
url: url.join(''),
dataType: 'jsonp',
success: function (data) {
var rows = data['rows'];
var ftData = document.getElementById('ft-data');
for (var i in rows) {
var centerX = rows[i][0];
var centerY = rows[i][1];
var imps = rows[i][2];
// Set the center points
var centerPoint = new LatLon(centerX,centerY);
var latLng = new google.maps.LatLng(centerX,centerY);
// Set top left points
var toplefty = centerPoint.destinationPoint(-45, 6)._lon;
var topleftx = centerPoint.destinationPoint(-45, 7.7)._lat;
// Set bottom right points
var bottomrighty = centerPoint.destinationPoint(135, 6)._lon;
var bottomrightx = centerPoint.destinationPoint(135, 7.7)._lat;
// Draw the box
drawBox(topleftx, toplefty, bottomrightx, bottomrighty);
// Drop markers
var marker = new google.maps.Marker({
position: latLng,
draggable: false,
markertext: imps,
flat: true,
map: carto_map
});
var label = new Label({
map: carto_map,
position: latLng,
draggable: true
});
label.bindTo('text', marker, 'markertext');
marker.setMap(null);
};
}
});
}
</script>
</head>
<body onload="initialize()">
<div id="map"></div>
<div id="ft-data"></div>
</body>
</html>
The Gviz API does have a 500 row limit for a given query.
Any table is limited to 100,000 mappable rows, but that's well outside your reported 20,000 rows.
The new Javascript API, currently accepting Trusted Testers, offers JSON format support for any number of rows returned for a query. You can apply for the TT program by requesting membership in this group:
https://groups.google.com/group/fusion-tables-api-trusted-testers
-Rebecca
The fusiontables/gvizdata URL is intended for Gviz charts and so is limited to 500 points. There are other ways to query that don't have that limitation. See https://developers.google.com/fusiontables/docs/sample_code for examples.
I routinely refresh a 2500 row table by deleting all rows and inserting new ones. The loop in my code that constructs the INSERT sql has a nested loop that just counts to 400, sends that sql, and then starts building another one with the next 400 records.