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

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1answer
246 views

How to obtain elevation value from given SRTM data on mouse click in web browser? [closed]

I need JavaScript code for obtaining elevation data from SRTM tiff image. I have used Google APIs, but I need for downloaded SRTM tiff image. (SRTM file is being loaded on a base layer, and both ...
1
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0answers
37 views

Why reprojection GeoJSON with new.ol.View - not working?

I try to reproject GeoJSon file in OpenLayers 3 from : Geojson link With these JS in head : <script src="js/jquery-2.2.3.min.js" type="text/javascript"></script> <link ...
1
vote
1answer
1k views

How can I dynamically restrict pan extents on an image layer in OpenLayers 3?

I have been sandboxing with OpenLayers 3 and thus far have been happy with the results. I have used answers on this site to restrict my most zoomed out level from panning and to restrict the range of ...
9
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2answers
356 views

Instructor led Web mapping development courses? [closed]

I have been messing around with programing for a while now and have gotten proficient with Python and have some interest in HTML 5 and Javascript. I have recently received a request for an IRD ...
0
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0answers
37 views

Loading WFS from Geoserver to Leaflet

I use GeoServer 2.7.0 and Leaflet-0.7.7 and the jquery: <script type="text/javascript" src="http://code.jquery.com/jquery-1.9.1.js"></script>` for showing a WFS in my Geoserver. How do ...
0
votes
1answer
41 views

Read WKT geometry using JTS 1.13 in java

I want to create a shape file from coordinates, in the client side I take the coordinates of a polygon by opelayers, it send to a java class, in this class read the geometry of the polygon, when the ...
7
votes
3answers
2k views

Moveable ArcGIS Identify Popup Window (Dojo)

I'm trying to get a popup window that identifies a location to be moveable. My code is similar to the API example: var popupOptions = { fillSymbol: new ...
1
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2answers
827 views

Display photo in GeoExt popup

I have point feature with name PointPhoto. This feature have attribute: id area PhotoPath Now I am using GeoExt popup to display this attributes, but I cant find a way to display image from ...
0
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1answer
56 views

How to call the geojson dynamically according to area selection in openlayer 3

I'm trying to get geojson according to the selection of a particular area. For example, if I have selected a built up area it will only show that area . I'm calling geojson data through php page, and ...
0
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0answers
9 views

JavaScript API ArcGIS Combine Legend with On_Demand feature class query

I am having trouble adding a legend to my JavaScript code I have a basemap, scale bar, and a click on demand query info box for my feature class which displays the attribute fields but when I add the ...
0
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1answer
39 views

openlayer 3 popup on marker mouseover

I'm only able to get popup on click. Can we get popup on marker mouseover Here's the example link Like in this example popup start display onclick on marker..But i wanted popup will automatically ...
0
votes
1answer
51 views

Add and later access Leaflet.draw polyline index and a new property value

I am using the Leaflet draw plugin located at https://github.com/Leaflet/Leaflet.draw and what I want to do is when a person draws a new polyline to print in the console the index number of that ...
1
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0answers
39 views

GML to GeoJSON JavaScript parser

Is there a JavaScript parser to obtain GeoJSON from GML? I have found only Python and OGR solutions.
3
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0answers
61 views

How to get the best GPS position Geolocation API

I want to get the most accurate position of my mobile phone with android. I'm comparing accuracy value in 2 seconds interval and if value is less than last value I'm trying to keep the position in ...
1
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0answers
23 views

Open layers 3, map.on('moveend',..): Differentiate between user interaction and map.setCenter() calling

I am implementing OL for a GIS application and want to add a 20 seconds timeout when the user scrolled the map, after which the GPS auto track function should resume. For that I am utilizing the ...
1
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2answers
1k views

OpenLayers vector does not draw (or re-draw) on zoom level change or layerswitcher off/on

Here is the full code (i'll highlight the important parts after): jQuery(document).ready(function($) { // ...
0
votes
1answer
397 views

Plotting GeoJSON data on map using ArcGIS API for JavaScript?

We are developing the portal in which we are using Arcgis javascript APIs.The requirement in our project is one of the weather provider is going to publish the webservice which will return the weather ...
1
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0answers
24 views

Change maxZoom option in runtime to ol.View in Openlayers 3

Im trying to change the maxZoom option once a functionality of the map is activated. So it has to be during runtime so it can be rolled back to the original maxZoom. Creating the ol.View you ...
0
votes
1answer
442 views

google.maps.InfoWindow is not working

If anyone encountered the same problem and come up with the solution please give me an idea if what's wrong with this code. The InfoWindow is not working when i click the map polygon. All parts ...
0
votes
1answer
230 views

Date field formatting as number in ESRI popup window

We are using the Park and Recreation Locator from ArcGIS for State Government and trying to put a date field into the popup info window. The field is pulling the correct data, but it's formatting it ...
1
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0answers
18 views

How can I ask for location and display it on map on my website? [closed]

I have added a map to my website. Now I want to add a feature to it wherein when a user clicks on the add event button on the header a popup should appear which ask for event name and location and as ...
2
votes
1answer
36 views

Add Links to Leaflet Choropleth Map

I'm making a choropleth map based on this example I would like to add links to the map, so that when a user clicks on a state they will be taken to a specific page. For example, a user clicks on ...
0
votes
0answers
13 views

Symbols not Rendering if more than 100 records

I have a link in the infowindow that displays all sale records in a particular area. The link work fine if there are less than 100 records. If there are more than 100 records then nothing happens ...
1
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0answers
23 views

Labels overlaps and more spaces between letters in cesium

I have a geojson loaded in cesium and also i had added labels for the layer with below code positions = entity.polygon.hierarchy['_value'].positions; //console.log(positions); center ...
3
votes
1answer
45 views

Geotools 12.3 creating shape file from coordinates

I want to export a vector layer to a shape file (create a zip file with .dbf, .fix. prj and .shp), but when the exported .shp file is opened in a Desktop GIS it doesn't show anything. For the ...
1
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1answer
39 views

Viewing a point geojson layer as markers in cesium

I have a point geojson layer and i would like to add and view it using cesium. I tried with the below code var dataSource1 = new Cesium.GeoJsonDataSource(); var roads = ...
1
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1answer
514 views

Using sql SELECT DISTINCT in Fusion Tables API

How do I go about using sql SELECT DISTINCT in fusion tables API?
0
votes
0answers
36 views

Cannot draw two layers at once using Leaflet

I have two map layers that I want to show at once: One is the full data, the other is a filtered version of the data. The map will draw with each of these layers, but not with both at the same time. ...
1
vote
1answer
34 views

Checking if point is inside irregular polygon?

I'm using Javascript (https://github.com/substack/point-in-polygon) to test if a point is inside polygon, however I think it's adapted from ...
1
vote
1answer
349 views

problem with popup conclusion on pressing a marker

I have markers on pressing to which popup has to be brought. how to make it? (coordinates of markers undertake from a DB) var map; var markers; function ejecutar() { init(3); ...
2
votes
1answer
76 views

Leaflet map draggable marker events

Everytime I click on the map I create a draggable marker with a drag function. It works great, however everytime I release the mouse after I dragged some marker, the click event of the map is ...
0
votes
0answers
36 views

Adding intelligent search box to cesium for implementing search within layer from server side?

There is a default search box in cesium to search by address or by landmark. Now i want to add a intelligent search box to search within the layer. I would like to know how to add such search box and ...
0
votes
0answers
8 views

Using IDW method and its output raster in a web app

I am creating an web app and needs to interpolates between some points- Weather data- (with IDW method) and show the results as a raster (like the output from ArcGIS) so a user can click on raster and ...
1
vote
1answer
161 views

Using AndNav tiles storage as input for OpenLayers.TMS

Is there a possibility to use map tiles from AndNav (created wit Mobile Atlas Creator) that are in format: Mapnik\12\2241\1369.png.andnav (I know that 12 is the zoom level but don't have idea what is ...
4
votes
1answer
65 views

Better (faster) way to join a csv to a geojson in Leaflet?

My goal: Store the attributes of a geojson in a csv file Allow a non-GIS user to edit a cloud-hosted csv file which then updates a webmap Have the web map be a static app with no GIS/PostGIS/SQL etc ...
2
votes
1answer
38 views

Using Multiple Versions of ArcGIS API for JS in Same Application

We've a large web based GIS application running which uses an older version of ArcGIS API (v3.7) for JS. The ArcGIS JSAPI v3.7 is lacking some functionality which are available in v3.15. Now I also ...
1
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0answers
39 views

Azimuthal Equidistant Projection - Rotate projection

I am using Azimuthal Equidistant Projection to plot points in a map being drawn in an Android application. The origin is the centre of the map. I have the formulas from here and here. I am getting ...
0
votes
0answers
17 views

Caching 10.1 to 10.3.1 version change caused issue?

In an ArcGIS Server 10.3.1 website we have two cached web services that will not display. A separate Server 10.1 shows them both without issue. Any ideas why the one Server will not show the ...
1
vote
1answer
44 views

ESRI Print Task (export web map) returns 500

I tried to export web map(Esri) with print task service. it works in localhost and in staging.xxx.com(http) too.But in preview.xxx.com(https) , it throws the error 500: Error performing execute ...
0
votes
0answers
7 views

CartoDB infowindow stuck at the top of the browser page

I am trying to put infowindows in my CartoDB.js map, but currently my infowindow is stuck displaying in the top lefthand corner of the browser window instead of over the points clicked. This is my ...
2
votes
1answer
1k views

Programatically add feature to Feature Layer with ArcGIS JavaScript API

I've so far been able to add a feature layer from an ArcGIS server, and I've also been able to add an editor widget which allows me to draw to feature with the mouse. The added features are being ...
0
votes
0answers
9 views

Want map layer colors to change with button clicks… One of them isn't working correctly!

I have three buttons that show different queries on a data set. I want them each to also display in a different color. When the map loads, I have the default layer in blue. However, After clicking the ...
1
vote
1answer
70 views

Viewing a geojson as 3D in cesium

I have a geojson with height informations in it. I tried adding the geojson to the scene using var viewer = new Cesium.Viewer('cesiumContainer', { sceneMode : Cesium.SceneMode.SCENE3D, timeline : ...
0
votes
1answer
31 views

Arguments not working in cartoDB createLayer method

I added a cartoDB layer to an existing map using createLayer method and it loaded properly. Thereafter, created a variable params and parsed the arguments as sees on the code snippet below. ...
1
vote
0answers
27 views

Changing layer color with a button click

I am trying to change the color of my map layer when filter buttons are selected. So, the goal is: the user sees all of the data in one color. Then, when they click on a filter button, only a subset ...
0
votes
0answers
39 views

OpenLayers 3 : ol.View setMinZoom or setMinResolution?

I'm working with OpenLayers 3.14 and still have the same problem that should be so simple. I'd like to change the ol.View object properties, but not in the same declaration than the var map = new ...
0
votes
1answer
40 views

Error with popup overlay in OpenLayers 3?

In OpenLayers (OL) 3.15.0 I declare a popup contains like : popup = $(eval('<div id="popup"><p>My contain</p></div>')); And after, I declare my overly with this popup ...
0
votes
0answers
19 views

Building layer not showing any attribute when using feature grid plugins in gxp app.js?

I am following the OpenGeo suite 4.8 building complete web application tutorial. In that tutorial I am trying to add feature grid of a layer as mentioned in tutorial. But I am not getting any ...
0
votes
0answers
23 views

Draw point turns into panning for Openlayers 3?

I've been trying to use the draw interaction on OL3, and as soon as I drop the point on my map and leave the on draw.on('drawend function, the map starts panning like its bound to the pointermove ...