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

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2answers
2k views

How to style geojson polygon using L.mapbox.featureLayer()

I have this code: var SupIncend = L.mapbox.featureLayer().addTo(map); var ArbolesAntes = L.mapbox.featureLayer().addTo(map); var ArbolesX = L.mapbox.featureLayer().addTo(map); var ...
2
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0answers
132 views

Multiple Leaflet maps on website in different divs

I'm pretty new to leaflet.js and I'm trying to figure out how to assign the same map with the same set of options and layers to a different HTML container instead of having to remove and add a new one ...
4
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1answer
519 views

ogr / osr for node.js / javascript

I use a python module I created that does tests for point in polygon. It uses the python osgei/ogr and osr modules. Specifically, I use the following elements of these modules: ...
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0answers
131 views

OpenLayers supported image formats

I need to display ImageLayer in OpenLayers. Which image formats are supported in OpenLayers?
2
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1answer
70 views

How to detect other objects are on which side of an object based on lat long

I am working on a system that detects the lat/long of vehicles. I want to track other vehicle's position: left, top-left, right, top-right, bottom-right, bottom-left etc based on lat/long. I have ...
2
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1answer
760 views

OpenLayers - cannot set layer opacity

I have the following problem: by default, you can simply change the opacity of layer by writing for example: layer.setOpacity(0.3); But when I add it to my map SelectFeature controls, my layer is ...
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0answers
44 views

Leaflet: Is there a way to use click event just like mouseout?

I made a map with leaflet by following the official Leaflet tutorial on interactive choropleth maps. I would like to make the map compatible with smartphones, so I added a click event, which acts ...
2
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0answers
340 views

OpenLayers: Switch layer off when switching another layer on

As the title says, I want to turn layers off when turning another layer on. I wrote a function that works. However, I have to click the layer twice in the LayerSwitcher to turn the layer on that I ...
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0answers
169 views

How to change dialog box with jQuery Mobile on OpenLayers

I have a problem with dialog box made with jQuery Mobile on OpenLayers. I want to make a popup box instead of a dialog box, but when i click the point the info for the point appears at different ...
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1answer
337 views

QGIS 2.4 plugin PyQT qWebview javascript interface problem

I have a QGIS plugin which contains a qtwebview and Javascript communication between the page and the plugin. It is working perfectly with QGIS 2.2 but not with 2.4 (both QGIS versions share the ...
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1answer
328 views

How can I measure area in square kilometres from lat / lon gps coordinates?

I have code from openlayers that I cannot quite handle because I am so new for these kind of codes. My main goal is to measure area from n amount of lat/lon gps coordinates and convert the result into ...
2
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1answer
100 views

How to display MousePosition outside map container? [closed]

I am a new to OpenLayers. By Default the MousePosition displays the coordinates within the map. I need to display the coordinates outside the map is a specific place. How do I do this?
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0answers
434 views

Callback method geocode items nominatim not work

function addr_search() { var inp = document.getElementById("addr"); $.getJSON('http://nominatim.openstreetmap.org/search?format=json&limit=5&q=' + inp.value, function(data) { ...
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0answers
288 views

javascript/jQuery getJSON very slow with a inner loop

asked here too http://stackoverflow.com/q/25024466/528884 I'm using OpenLayers to render DOM for layerswitcher, with about 1200 divs. The problem can be simplified as follows. This is very fast (3 ...
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1answer
1k views

Changing list-item css class using ng-class when mousing over Leaflet Map Markers

I've got a doozy of an ng-class problem. So I have an app with a map/markers on the right and a list-item menu on the left with info about the markers (like Yelp or Foursquare). With some of my ...
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3answers
142 views

How to draw polygons from watershed boundary dataset?

I'm working on a web map using esri arcgis javascript api. I'd like to use the NHD Watershed Boundary Data to draw polygons based on the boundaries of the watersheds. Does anyone have any ideas of how ...
0
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1answer
215 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 ...
2
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1answer
728 views

Check if line crosses a polygon

What I'm trying to do is with JSTS to check with lineGeom.crosses(polygonGeom) function if a line is crossing completely a polygon. The problem is that both cases from the picture returns true. I ...
1
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1answer
154 views

image rectification with Mercator projection

I have written an image rectification function which allows a user to select 2 points on an image and 2 points on a map. The function will then rectify the image so it is translated, scaled and ...
1
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0answers
84 views

Calculate distance in point collection algorithm

I've got collection of points which are sorted by x,y and distance between n and n+1 (array of objects [{x:0,y:0},{x:1,y:1}....] I would like to calculate distance between all points (point 1 distance ...
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0answers
50 views

How to go about creating a custom tool/adding special functionality for a web app

In my soon to be developed web app, I will have an image service and also a feature service that is essentially an index to the image service, with all kinds of attributes. I would like for the user ...
2
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1answer
435 views

How do I use Proj4Leaflet projections correctly?

I'm loading data layers from a WMS server into a Leaflet map, and I need to give the user a choice of projections. For the WMS server requests, I just need to change the CRS parameter to a different ...
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1answer
2k views

How to reduce the opacity of a Google Maps layer in CartoDB.js

I have a CartoDB.js-App where I load my vis using cartodb.createVis (I do not manually define Leaflet layers). How can I reduce the opacity of the Google Maps base layer? I tried the following, as ...
3
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1answer
2k views

Make Leaflet Map Background Transparent

How can i make the background of the leaflet map transparent. I see opacity controls from the layers, but not the map background. Should the be changed just with plain CSS? Thanks
0
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1answer
469 views

Draw arc in Geo map WGS84 coordinate system

im trying to draw an arc in OpenLayers, in non Geo map it works well and here is my code: function calculateArcPointsNonGeo(center, radius,startAngle,endAngle,segments) { var pointList = ...
0
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0answers
479 views

ArcGIS Circle Buffer

I am stuck, trying to draw a simple circle buffer using ArcGIS. Here is how I set up my base map: dojo.require("esri.map"); dojo.require("esri.tasks.servicearea"); dojo.require("dijit.dijit"); ...
2
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1answer
1k views

How to apply weight to Google heatmap?

I am trying to plot a Google heatmap based on the JSON objects returned. Here is my JavaScript: function getHeatMap() { heatLayer = new HeatmapLayer({ config: { "useLocalMaximum": true, ...
4
votes
4answers
2k views

How can I find closest point on a polygon from a point

I have a point that may be inside or outside of a polygon, I need to find the nearest point on the polygon boundary from the point. Point(x,y) may be inside or outside of the polygon, shortest ...
1
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1answer
946 views

Using Google Map Spatial Reference to plot HeatMap?

Basically I am trying to plot a Google heatmap based on the JSON objects returned. Here is my JavaScript: function getHeatMap() { var gradient = [ 'rgba(185, 185, 203, 0)', ...
2
votes
0answers
107 views

How to simulate events from Openlayers 2?

I am working on a GIS API that uses OpenLayers. I am testing it using QUnit. The problem is I need to simulate clicks and trigger some events to be able to test the whole code. For example, I have a ...
5
votes
3answers
674 views

Guidance when to style your features in Tilemill vs. Leaflet?

I've found this generally to be dependent on each project's goals (or what the client wants), but when you have the options, what any rules of thumb or guidelines do use you in a project to determine ...
0
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1answer
255 views

Syntax for using ArcGIS for Server layer with WMS service?

I am having some issues with getting an image/png format from an ArcGIS Server. The console returns: Resource interpreted as Image but transferred with MIME type application/vnd.ogc.se_xml: ...
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1answer
476 views

ESRI Javascript API QueryTask error handling

I'm struggling to find the proper way to handle errors in a QueryTask. Particularly if the user clicks outside the feature layer. My current QueryTask looks at a field (bare_earth) populated with ...
0
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1answer
215 views

Kml not overlaying onto Google Map

I created a basic dashboard with MVC 4, visual studio 2012, The dashboard displays a Google map. Here is an image of the dashboard: My intention is to be able to take this Kml file: And ...
1
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1answer
277 views

ArcGIS Javascript API Editing - Create Feature from Geometry Object

I'm interested in passing a geometry object with certain attributes to an exposed feature class for committed edits. Essentially, I want to manually create a new feature without the template pane or ...
1
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0answers
307 views

Openlayers Map Marker / Popup Behaviour Mobile Devices

Quick overview. i am creating a site with a map using Openlayers and Open Street Maps. User clicks on map and fills out a popup form and submits form. Markers appear at lonlat points where map was ...
2
votes
1answer
204 views

Openlayer3 basemap appears white block in Chrome

i faced interesting an issue on Chrome. im using google's 4 number base layer (street, hybrit, etc.) When my tiles are loading over baselayer, baseLayer becomes white block. Why? No any issues on ...
1
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1answer
77 views

How do I cycle through the available Overlays and Base Layers using OpenLayers

I would like to have my map cycle through the display of loaded overlays and base layers using Javascript or jQuery. I would like to do this with a delay of 5 seconds between cycling. Does anyone ...
0
votes
1answer
825 views

Reproject WKT Polygon with Javascript

I have a polygon in WKT in EPSG:4326: polygonWKT = 'POLYGON((13.215179443359373 52.588032137196755,13.42803955078125 52.592620721000365,13.454132080078125 52.46897854656702,13.347015380859375 ...
0
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1answer
534 views

CartoDB or Leaflet.js get coordinates of point clicked?

Using CartoDB or Leaflet.js is it possible to retrieve the coordinates of the point on the map clicked when opening an infowindow?
4
votes
2answers
2k views

Leaflet highlight feature by ID

I have a map application where: I load polygons as GeoJSON objects I draw all polygons in a single layer I highlight a polygon on mouse hover What I need to do is the following: on mouse hover, I ...
1
vote
1answer
95 views

Basemap Widgets

I am looking for a fancy Basemap plugin to use with the ArcGIS Javascript API. Something along the lines of the Basemap Widget (see image below) available in the Flex Viewer would be great. Anyone ...
4
votes
1answer
228 views

How to offset/displace overlapping lines in a web map?

I have a dataset of points representing a To/From status - something like distribution centres and delivery addresses. When the user clicks on a point I'd like to show the relationships between this ...
0
votes
1answer
222 views

Accessing organisational webmap using downloaded Basic Viewer of ArcGIS Online?

I have downloaded the Basic Viewer of ArcGIS Online (AGOL) to my web- and arcgis server within my organisation. Now I want that copied basicviewer to access a webmap on agol that I made accessible to ...
0
votes
2answers
370 views

Simulate a mouse-click inside an ArcGIS Online JavaScript Application

I have a JavasScript application consuming an ArcGIS Online Web Map. I want to open a default popup at a specific coordinate. Is there a way to simulate a mouse-click at that point, or a better ...
0
votes
1answer
155 views

Using a tree menu beside openlayers

Is there an aplication to add tree menu for the map showed with openlayers? I mean show a map on my site exactly how is showing in google earth for example, my layers organized in folder/subfolder, ...
0
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1answer
202 views

Adding controls to OpenLayers maps - is this good code

I have multiple OpenLayers maps, each map gets a subset of controls that I use across all maps. In the past I have added controls in the traditional way, for each control. var control = new ...
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1answer
167 views

ArcGIS API for Javascript - InfoTemplate on a polyline

I have a web map with a few points and a single polyline. I have infoTemplate(s) attached to the points and tried to replicate this to the polyline however, I can't get it to work. I looked on the ...
0
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1answer
573 views

Geocortex Viewer: Running a Workflow with Arguments

I have a webpage with the Silverlight Geocortex Viewer embedded in it. Through the browser's developer console, I can run commands through it such as ...
1
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0answers
1k views

How can I get all the latitude, longitude coordinates/points inside a rectangular polygon drawn in google maps?

Google maps lets you obtain a valid address by clicking on houses or buildings one by one, but it would be much easier if you could draw a polygon on the map and get a list of all valid addresses ...