JavaScript is a prototype-based, object-oriented scripting language that is dynamic, weakly typed and has first-class functions.

learn more… | top users | synonyms (1)

0
votes
0answers
170 views

Leaflet vs Openlayers vs Geoserver for overlapping polygons application

I have 3 layers of vector polygons(about 80 polygons - 1MB geojson each but I haven't simplified any yet) displaying school territories (kindergardens, primary and secondary education) and I want to ...
2
votes
1answer
60 views

Create Chart from Query Task

I need to create a chart from the result of a query task using Esri JS API. Note, the chart does not have to be created with Esri API, but the query runs in that. The result is written to the DOM ...
0
votes
0answers
16 views

line chart similar to Esri Histogram Time Slider [duplicate]

I am looking for a solution similar to the one provided by the Esri DIGIT class "HistogramTimeSlider" but instead of a histogram, I would like to use a line chart. Anybody seen a suitable reference?
1
vote
1answer
86 views

Openlayers dynamic viewport width and height assignment

I display an openlayers map in a html page by placing it in a tag and assigning a css class to it so as to set its dimensions (map size and map bounds). i then attempt to dynamically create a style ...
0
votes
0answers
62 views

How to Show the Lat/Long of Marker in a Textbox if it has been clicked

function getInfo() { $.getJSON("get_info.php", function (data) { for (var i = 0; i < data.length; i++) { var location = new L.LatLng(data[i].lat, data[i].lng); ...
0
votes
0answers
32 views

How to add 'title' or tooltip to navigationHistory in openlayers

I want to add tooltip/title to NavigationHistory Control in openlayers. I tried 'title' property but its not working. My code is var pDiv=document.getElementById("maptools"); var ...
3
votes
1answer
186 views

How to get/pass token with ajax call to secured ArcGIS REST Service

I have a web map application that was written in HTML & JavaScript (using the ArcGIS JavaScript API). It desplays a few services that reside on an ArcGIS Server (10.2). It also has a custom legend ...
1
vote
1answer
124 views

Using Odyssey.js with Cartodb.js

I'm looking to use Odyssey to create an interactive introduction to various data layers on an interactive web map I've created using CartoDB.js. I'd like to have different data layers turned on / off ...
1
vote
2answers
298 views

Openlayers 3 spyglass example (advanced functionality)

I would like to use openlayers 3 spyglass example inside my project. The problem is when I want to use selection for layer, which will be inside spyglass circle. I can't get it working, I don't know ...
0
votes
1answer
274 views

Transfer Data from Database to Leaflet POP UP

Good Day too all! I just wanna ask a little question. Ahmm how do you show data from database to leaflet pop up? Here is my code in php select command <?php $db = new ...
2
votes
1answer
64 views

OpenLayers Only draw features in a vector layer within view

I am dealing with a kml that I am importing into openlayers as a vector layer. This kml has many features so it dramatically slows down the web app. I would like to make it so only the features within ...
1
vote
1answer
62 views

Can't Get my legend on a swipe layer map

I'm having trouble getting a legend on my swipe layer map. I'm new to Javascript and took most of the code from the API reference but can't get the legend to show up for either layers. I'm Hoping ...
1
vote
1answer
50 views

How to create a infotemplate that displays automatically

I have created a postcode search that that highlights a polygon and zooms in. but I would like it to display a infoTemplate box with having to click in it. I want it to show when the function runs. ...
1
vote
1answer
138 views

Can I plot points on a map using JSON data from a Node.js API?

I am new to the arcGIS JavaScript API. I have a Node API that is providing geographical information in JSON. I have google'd for examples and searched for solutions on this web site. Can anyone ...
0
votes
0answers
121 views

Apply css styles to layers in openlayers3

define layers and styles using openlayers3 API. i need 2 apply css styles for layers.for that code is in below used //applying styles for wms layer var fill = new ol.style.Fill({color: 'rgba(237, ...
1
vote
0answers
23 views

Using statisticdefintion in a querytask

I have a question about using QueryTask to accomplish to jobs: Identify unique value for a county in a graphics layer via mouseover. This unique county value (from a specified field) is used to ...
1
vote
0answers
97 views

How to get bounds coords by center LatLng point, width and height in pixels and zoom?

I have to calculate bounds coordinates to query mongodb box on server side to get data before google maps is loaded. How can I get four LatLng corners by center LatLng point, window width and height ...
0
votes
1answer
83 views

OpenLayers/jQuery without CDN?

I was wondering what are the necessary files for hosting a webgis server with OpenLayers3 without using a CDN? I am testing on a localhost without internet access. It doesn't work to merely copy ...
2
votes
1answer
928 views

Layer loadstart & loadend events in OpenLayers 3

OpenLayers 2 has these layer events "loadstart & loadend." What is equivalent to them in OpenLayers 3? While a vector layer loads and is rendered, I need to show a loading icon.
0
votes
0answers
37 views

cannot figure out choloropleth map with kartograph.js

I am trying to make a very simple choropleth map uisng kartograph. i am able to create simple svg world map but i cannot figure out how to create a choropleth map with kartograph.js. The map falls ...
1
vote
1answer
398 views

How to get list of all markers from selected Polygon using OpenLayer MAP v2

I am able to run following features on OpenLayers Map Version 2.x Put Markers on Map Draw Polygon on Map Select Polygon on Map Now my requirement is when i select any polygon then i would like to ...
0
votes
0answers
154 views

What is the best way to escape/encode special characters for a CartoDB insert GET request?

I have a simple web app that uses CartoDB.js. I have a data entry form and use jQuery to pull data from my inputs and textareas. I then form my SQL insert statement and insert it into my CartoDB ...
1
vote
1answer
52 views

How to get spatial reference in ArcGIS Server identify response

I'm using the ArcGIS API for JavaScript to query features in a web map. After sending an identify request to my ArcGIS Server 10.2.2 Map Service (added as ArcGISDynamicMapServiceLayer, the response is ...
1
vote
0answers
185 views

OpenLayers 3 modify end event

I want to save the geometry data after I modify it, so I need an event that fire after I finish to modify the feature. I use the following from this post: listener modify interaction var ...
0
votes
1answer
244 views

openlayers 3 get feature location

After I am using the drawing interaction or modify interaction I have a listener that returns the feature that modified or added. for example: (draw interaction): draw.on('drawend', function (event) ...
1
vote
1answer
51 views

Disabling a map in Javascript API

Here is my code for my map: omap = new Map("overviewMap", { extent: initExtent, logo: false, slider: false }); tmoverview = new ArcGISDynamicMapServiceLayer(mylayer, { "opacity": 1.0, "visible": ...
1
vote
0answers
34 views

Overlap feature's style with layer style

I have a Vector layer, where each feature is created using a image with different rotations. var point = this.__getFeaturePoint(); featureStyle = { externalGraphic: this.__getImageURL(), ...
1
vote
0answers
57 views

Legend not removed when layer changed

I made this webpage with JavaScript and CartoDB. The layer selector works like I expected it to but I noticed that the legend are stacking on top of each other and not being removed when the layer is ...
1
vote
1answer
285 views

Cant get infoWindow to show in CartoDB dynamic layer

Heres my very simple code. <title>Leaflet multilayer example | CartoDB.js</title> <meta name="viewport" content="initial-scale=1.0, user-scalable=no" /> <meta ...
1
vote
1answer
78 views

Show Cartodb Maps infowindow on hover programatically

How do i get to show the cartodb infowindow when one hovers over a point? I see that it is possible via the gui but how can one do it via code? what method should i call on the on('featureOver') ...
0
votes
1answer
51 views

Adding geometry.type circle

I have to amend the following code so that on the map it's possible to draw a second circle graphic as well as a line, polygon and point. I've tried to add an else if statement much like the polygon ...
0
votes
0answers
80 views

How to send parameter to mapfile from javascript with query to show map in browser?

I try to send parameter to mapfile but it's seem it didn't work very well. Can anyone help me find solution please? Here's my mapfile webgis.map MAP NAME "Banda_Aceh" SIZE 2000 900 UNITS dd ...
0
votes
1answer
140 views

Openlayers event cluster feature id does not appear on layer vector feature id list

My application's objective is to click on a cluster and produce a popup with a list of all placemarks clustered there where every entry is a hyperlink that closes current popup and opens a new ...
0
votes
1answer
358 views

OpenLayers 3 zooming to layer when source is ImageWMS

When I create a layer using a vector source I can force the map to zoom to the layer using //stuff including setting up defaultStyle var vectorSource = new ol.source.GeoJSON({ url: geoJsonUrl, ...
0
votes
0answers
70 views

Adding an extra tooltip for addLine

I'm using the following code to include tooltips for drawing a point. I want to include a tootip for drawing a line - how can this be done? Can I just add an extra line for addLine at the end? ...
1
vote
1answer
261 views

Convert Multipolygon Geojson to multiple geojson polygons?

I see a lot of questions going from Polygons to MultiPolygon, but is there some easy way to go the other way around? It would also be useful to preserve the attributes from the MultiPolygon to apply ...
-1
votes
1answer
50 views

How to create if else statement for two combo boxes?

I have an ArcGIS JS API application where I have an "origin" combo box that must be populated for request type, in the following series of combo boxes I would like for a value to be chosen based on ...
0
votes
0answers
135 views

Postgresql , PHP JS and Json and Google Maps

I try to make a dikstra pgrouting query in a php file i retrive the coordinates and pass them in the Javascript code as o JSON object and visual in the map use this Script from google api to draw the ...
3
votes
1answer
243 views

OpenLayers Map From QGIS Server

I am creating my first map using OpenLayers and I am having trouble. The map was created with QGIS Desktop 2.6, and I am using Ubuntu 12.04. The WMS service is QGIS Service. This is my first try doing ...
3
votes
1answer
132 views

Show an ArcGIS InfoWindow on Map Init

I have created a map with a simple marker at a specified location but I cannot figure out how to have an infowindow attached to the position open automatically on page load. This is my init function: ...
1
vote
1answer
312 views

Google Streetview API overlays

Does anyone know if I can draw georeferenced polygons in the streetview api. I'm curious to know if anyone has successfully tried this. I see that custom overlays are allowed but I'm not sure if this ...
0
votes
1answer
366 views

Google Maps Api , PHP, Javascript and Postgresq-Postgis

I'm trying to make a web application, where I take the start/end city from a text box, geocode the city, use the coordinates to query my database in PHP, and return the features to be drawn in the ...
1
vote
0answers
233 views

ESRI Javascript - Print Task GP Service - Symbology Issue

I am using the ESRI js API, and using a python GP service to run a print task to PDF with custom layouts. This works great, except when i have any map service enabled in the map. The layer in the ...
1
vote
1answer
116 views

Openlayers 3 draw set name

I have following simple draw interaction: draw = new ol.interaction.Draw({ features: featureOverlay.getFeatures(), type: (type) }); Now I would like to add attributes like a name and id to ...
1
vote
0answers
36 views

My map looks wierd and “pixly” in OL3

I'm trying to present a mapserver with OL3, it doesnt work well. The documentation of the mapserver is non-existent and the GetCapabilities to the mapserver responds with a very short (not so good or ...
1
vote
1answer
41 views

Is it possible using JavaScript and cartodb.js to get the layer's total amount of visible data in a certain moment?

I am working with a torque layer and I would like to know for each moment the amount of data points shown in the visualization.
0
votes
0answers
12 views

Trying to build website which shows different satellite images? [duplicate]

Basically i want to build website which shows different satellites images of cities and as i hover my mouse the lat/long should change. Sorry for such a basic question, as i am new to javascript, if ...
2
votes
1answer
2k views

OpenLayers 3 - draw multiple lines/paths based on coordinates

I am trying to draw a line(s) based on give coordinates (starting and ending point). Googled , found few examples but non of them seem to work probably because they are for OL2, so this is my last ...
1
vote
1answer
96 views

Color Blend Mode for OpenLayers Vector Feature

Currently I'm developing a WebGIS app using OpenLayers 2.13.1, GeoServer, and PostGIS. The app has buffer analysis feature which is working fine like the picture below. What I'm looking for is: is ...
3
votes
2answers
118 views

Geocode an address and then buffer

I have a script which geocode an address and buffer that address by 1, 5 and 10 mile radius. The problem I am having is that the address on the map shows 4 different points not sure what's causing it. ...