I have an Yandex Maps installed on my project
Code below display an cluster view of all objects.
What I would like to do is disable clusters
$.getJSON( ymFormAction , "ymJSON=1" ).done( function (json) {
window.geoObjects = ymaps.geoQuery(json);
window.clusters = geoObjects.search("geometry.type == 'Point'").clusterize({preset: 'islands#invertedblueClusterIcons'});
myMap[[+idMap]].geoObjects.add(clusters);
// Trying to disable clusters
var coords = geoObjects;
// coords should be = [[56.023, 36.988]] according to API
var myCollection = new ymaps.GeoObjectCollection();
for (var i = 0; i<coords.length; i++) {
myCollection.add(new ymaps.Placemark(coords[i]));
}
myMap[[+idMap]].geoObjects.add(myCollection);
});
The thing is that ymaps.geoQuery doesn't return coordinates (or a GeoObjectCollection for that matter). What it returns is GeoQueryResult. Here what you can do to add results of geoQuery to a map:
ymaps.geoQuery(json).search("geometry.type == 'Point'").addToMap(yourMap);
Related
I have been struggling with this piece of javascript for some time now. I have read different, and similar, posts on the subject but I can't find anything that seems to lead me in the right direction of solving my problem.
I need to call the value of the variables from the watchPosition (and getCurrentPosition) method , set them as global and then call them inside of the function initMap().
The code is working but watchPosition reloads the Google map (this appears to happen when i change the browser/switch between tabs). I can't get the global variables to catch the value from the methods below (inside updateMarker).
How do I set the values from:
mon_lat = +position.coords.latitude;
mon_long = +position.coords.longitude;
to become global?
My main question is, more or less: how can i load the script without updating function initMap()? I would like it so that the navigator.geolocation.watchPosition() method updates automatically.
$(document).ready(function() {
updateMarker();
});
var mon_lat = null;
var mon_long = null;
var start_lat = null;
var start_long = null;
function updateMarker() {
// Get positions
if (navigator.geolocation) {
// Get current position
navigator.geolocation.watchPosition(
function (position) {
mon_lat = +position.coords.latitude;
mon_long = +position.coords.longitude;
initMap(mon_lat, mon_long);
}
);
// Get starting position
navigator.geolocation.getCurrentPosition(
function (position) {
start_lat = +position.coords.latitude;
start_long = +position.coords.longitude;
initMap(start_lat, start_long);
}
);
}
}
function initMap() {
// Display the map
map = new google.maps.Map(document.getElementById('map'), {
center: {lat: mon_lat, lng: mon_long},
zoom: 10,
mapTypeControl:false
});
}
I've been able to import some shapefiles to Neo4j 2.3.1.
Now how do I view this data on a map?
I have tried the Wiki instructions on GeoServer and uDig, but both of them are outdated and I couldn't get it to work.
Is there any recent tutorial or other tool that can solve this problem?
I've used neo4j-spatial with Mapbox.js for visualizing geometries in a map.
For my use case I indexed US Congressional district geometries in neo4j-spatial then query the spatial index based on where a user clicks on the map, returning the closest district including the WKT string and the results of a Cypher query. To render the WKT polygon in the map I wrote a simple javascript function to parse that into an array of points to add a map annotation.
Here are some relevant code snippets:
Create the map and define a click handler for the map:
L.mapbox.accessToken = MB_API_TOKEN;
var map = L.mapbox.map('map', 'mapbox.streets')
.setView([39.8282, -98.5795], 5);
map.on('click', function(e) {
clearMap(map);
getClosestDistrict(e);
});
Handle mouse click
/**
* Find the District for a given latlng.
* Find the representative, commitees and subjects for that rep.
*/
function infoDistrictWithinDistance(latlng, distance) {
var districtParams = {
"layer": "geom",
"pointX": latlng.lng,
"pointY": latlng.lat,
"distanceInKm": distance
};
var districtURL = baseURI + findGeometriesPath;
makePOSTRequest(districtURL, districtParams, function (error, data) {
if (error) {
console.log("Error");
} else {
console.log(data);
var params = {
"state": data[0]["data"]["state"],
"district": data[0]["data"]["district"]
};
var points = parseWKTPolygon(data[0]["data"]["wkt"]);
makeCypherRequest([{"statement": subjectsQuery, "parameters": params}], function (error, data) {
if (error) {
console.log("Error");
} else {
console.log(data);
var districtInfo = data["results"][0]["data"][0]["row"][0];
districtInfo["points"] = points;
districtInfo["state"] = params["state"];
districtInfo["district"] = params["district"];
console.log(districtInfo);
addDistrictToMap(districtInfo, latlng);
}
});
}
});
Parse WKT into an array of points
/**
* Converts Polygon WKT string to an array of [x,y] points
*/
function parseWKTPolygon(wkt) {
var pointArr = [];
var points = wkt.slice(10, -3).split(",");
$.each(points, function(i,v) {
var point = $.trim(v).split(" ");
var xy = [Number(point[1]), Number(point[0])];
pointArr.push(xy)
});
return pointArr;
}
The code is in this repo. You can see the simple map demo here (just click anywhere in the US to get started). There is also a recent blog post about this example here.
I've got a GeoJson that I can load in ol3 without any problems.
var layer = new ol.layer.Vector({
source: new ol.source.Vector({
format: new ol.format.GeoJson(),
url: 'my_file.json',
})
});
My GeoJson have got a properties (let's say foo ) that I want to use to extrudedHeight.
I've done this in Cesium (see the Cesium exemple): http://cesiumjs.org/Cesium/Apps/Sandcastle/index.html?src=GeoJSON%20and%20TopoJSON.html&label=Showcases
But I can't find a way to do this on my ol3 layer.
Any clue ?
Edit:
I've hacked a bit and create my FeatureConverter like this:
test = {};
function extend(base, sub) {
// Avoid instantiating the base class just to setup inheritance
// See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/create
// for a polyfill
// Also, do a recursive merge of two prototypes, so we don't overwrite
// the existing prototype, but still maintain the inheritance chain
// Thanks to #ccnokes
var origProto = sub.prototype;
sub.prototype = Object.create(base.prototype);
for (var key in origProto) {
sub.prototype[key] = origProto[key];
}
// Remember the constructor property was set wrong, let's fix it
sub.prototype.constructor = sub;
// In ECMAScript5+ (all modern browsers), you can make the constructor property
// non-enumerable if you define it like this instead
Object.defineProperty(sub.prototype, 'constructor', {
enumerable: false,
value: sub
});
}
test.FeatureConverter = function(scene) {
olcs.FeatureConverter.call(this, scene);
}
test.FeatureConverter.prototype = {
olPolygonGeometryToCesium : function(layer, feature, olGeometry, projection, olStyle) {
olGeometry = olcs.core.olGeometryCloneTo4326(olGeometry, projection);
goog.asserts.assert(olGeometry.getType() == 'Polygon');
var rings = olGeometry.getLinearRings();
// always update Cesium externs before adding a property
var hierarchy = {};
var polygonHierarchy = hierarchy;
goog.asserts.assert(rings.length > 0);
for (var i = 0; i < rings.length; ++i) {
var olPos = rings[i].getCoordinates();
var positions = olcs.core.ol4326CoordinateArrayToCsCartesians(olPos);
goog.asserts.assert(positions && positions.length > 0);
if (i == 0) {
hierarchy.positions = positions;
} else {
hierarchy.holes = {
// always update Cesium externs before adding a property
positions: positions
};
hierarchy = hierarchy.holes;
}
}
var fillGeometry = new Cesium.PolygonGeometry({
// always update Cesium externs before adding a property
polygonHierarchy: polygonHierarchy,
perPositionHeight: true,
extrudedHeight: parseInt(feature.getProperties()['foo'])
});
var outlineGeometry = new Cesium.PolygonOutlineGeometry({
// always update Cesium externs before adding a property
polygonHierarchy: hierarchy,
perPositionHeight: true
});
var primitives = this.wrapFillAndOutlineGeometries(
layer, feature, olGeometry, fillGeometry, outlineGeometry, olStyle);
return this.addTextStyle(layer, feature, olGeometry, olStyle, primitives);
}
}
extend(olcs.FeatureConverter, test.FeatureConverter);
But it does not work... (and I do not know why...).
I want to create an app for airplane navigation. Since for pilots the Bing maps are useless I need to create my own map a texture of an aeronautical map.
I couldn't find any clue how to start on this. Is there an SDK for Bing maps where I can create my own texture/overlay?
Do I need to start from rock bottom and create a picture and change its position so the relevant part is in the visible area of the device?
I need the following features:
Show current position on the map.
Add some custom POIs via coordinates
After quite some research I figured it out myself.
Here is most of the code needed if you have the same scenario
Uri format:
"https://webserver/tiles/{zoomlevel}/{x}/{y}.png";
private void InitMap()
{
_gps = new Geolocator();
pointBuffer = cologne;
image = RandomAccessStreamReference.CreateFromUri(new Uri("ms-appx:///Assets/images/airplane.png"));
MyMap.Style = MapStyle.None;
//Setup Icao Layer
_icaoTileSource = new MapTileSource();
var _tileLayer = new HttpMapTileDataSource();
_tileLayer.UriFormatString = IcaoUri;
_icaoTileSource.DataSource = _tileLayer;
MyMap.TileSources.Add(_icaoTileSource);
//Setup VFR Layer
_vfrTileSource = new MapTileSource();
var _vfrtileLayer = new HttpMapTileDataSource();
_vfrtileLayer.UriFormatString = VfrUri;
_vfrTileSource.DataSource = _vfrtileLayer;
//Setup Low Level Layer
_lowlvlTileSource = new MapTileSource();
var _lowlvltileLayer = new HttpMapTileDataSource();
_lowlvltileLayer.UriFormatString = LowLvlUri;
_lowlvlTileSource.DataSource = _lowlvltileLayer;
airplane = new MapIcon()
{
Title = "My Position",
Image = image,
Visible = true,
Location = cologne,
NormalizedAnchorPoint = new Point(0.5, 0.5)
};
_tileLayer.AllowCaching = true;
MyMap.MapElements.Add(airplane);
systemSetCenter = true;
MyMap.Center = cologne;
MyMap.ZoomLevel = 10;
_vm.ZoomLevel = MyMap.ZoomLevel;
MyMap.ZoomLevelChanged += (s, e) =>
{
if(s.ZoomLevel > maxZoomLevel)
{
s.ZoomLevel = maxZoomLevel;
}
_vm.ZoomLevel = s.ZoomLevel;
};
}
I need to replace multiple value in JSONStore of IBM Worklight.
In this way is saved only first value. Why?
.then(function() {
for (var index = 0; index < elencoSpese.length; index++) {
var spesa = elencoSpese[index];
var spesaReplace = {_id: spesa.id, json: spesa};
spesa.id_nota_spesa = idNotaSpesa;
spesa.checked = true;
WL.JSONStore.get(COLLECTION_NAME_SPESE).replace(spesaReplace);
}
})
You want to build an array of JSONStore documents and pass it to the replaceAPI. For example:
.then(function() {
var replacementsArray = [];
for (var index = 0; index < elencoSpese.length; index++) {
var spesa = elencoSpese[index];
var spesaReplace = {_id: spesa.id, json: spesa};
spesa.id_nota_spesa = idNotaSpesa;
spesa.checked = true;
replacementsArray.push(spesaReplace);
}
return WL.JSONStore.get(COLLECTION_NAME_SPESE).replace(replacementsArray);
})
.then(function (numOfDocsReplaced) {
// numOfDocsReplaced should equal elencoSpese.length
})
I assume this happens in the JavaScript implementation of the JSONStore API, if that's the case the answer is in the documentation here. The JavaScript implementation of JSONStore expects code to be called serially. Wait for an operation to finish before you call the next one. When you call the replace multiple times without waiting, you're calling the API in parallel instead of serially. This should not be an issue in the production environments (i.e. Android, iOS, WP8 and W8).