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

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2
votes
1answer
94 views

Why my Shapefile is not loaded into OpenLayers?

This is my website for test: http://www.cv.nctu.edu.tw/tonywang/shapefile-js-openlayers/ol_simple.html I want to put my Shapefile in OpenLayers. I found an example at ...
3
votes
1answer
49 views

Define a circle extent using the circle tool - arcgis javascript api

I have the following script for drawing a circle and I want to limit the user to a predefined radius: $('#circle').click(function () { clearPreviousSearch(); ...
0
votes
0answers
110 views

How do I determine programmatically what values to add to the proj4js constructor for a CRS or SRS such that I can iteratively render proper overlays

I think this is primarily a GIS based question as far as for example: var crs = L.CRS.proj4js('EPSG:2154', '+proj=lcc +lat_1=49 +lat_2=44 +lat_0=46.5 +lon_0=3 +x_0=700000 ...
0
votes
1answer
96 views

Different results of fullscreen mode in OpenLayers 3

anyone here have already met similar problem like me? My original application is not viewing correctly (in all browsers) in fullscreen mode, which is openlayers 3 functionality. The problem is with ...
0
votes
2answers
126 views

Open Layers Label styling (font size)

I have a polygon dataset that I am symbolizing in OpenLayers using a context to determine the correct color, and also a label for each polygon that I want to alter depending on the zoom level. But ...
1
vote
0answers
54 views

Limit Nominatim results tp specific country

I want to limit the search in Nominatim to a specific country and was trying this code: mapPanel = new GeoExt.MapPanel({ border: true, region: "center", map: map, zoom: 7, ...
0
votes
1answer
57 views

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

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 ...
0
votes
0answers
175 views

How to add WMS Layer from Mapserver( localhost) on Cesium Globe?

I am trying to add WMS layer from mapserver i.e. from localhost on Cesium Globe with the following HTML code. But I am not able to load or connect Cesium with the Mapserver and nothing is displayed on ...
1
vote
1answer
80 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
32 views

Prevent rendering of a layer until time definition is applied

I want to add layers to a map, with some criteria. Before the layer is drawn, I want to a set a time definition on the client-side to limit the data being rendered. I've tried setting the time ...
133
votes
16answers
50k views

How do various JavaScript mapping libraries compare?

I am working on a web-based mapping system and I'm trying to figure out the best/most appropriate library to use. There are a few of them about and they each have pros and cons. Even after trying a ...
1
vote
0answers
130 views

Waiting on AJAX result in main JS function

So .... my main init()Javascript function has these 3 lines: sarea = GetArea(Uname,UIDfield,Table, document.getElementById("Source").value); darea = GetArea(Uname,UIDfield,Table, ...
1
vote
2answers
38 views

Including js file in openlayer.js file

I have this code for showing markers on map: function addUserLayerCSV(){ layer1 = new OpenLayers.Layer.Vector("CSV", { projection: epsg6316, strategies: [new ...
0
votes
1answer
143 views

Finding the closest facility in a feature layer from a webmap

I have created a webmap on which a feature layer is displayed and I'm trying to find the closest facility when the user clicks on the map. Based on Find closest facilities in the Javascript API ...
1
vote
1answer
51 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. ...
3
votes
0answers
47 views

simple raster format to use in Web applications?

I'm building a Web application in which users create and edit very coarse raster data. They're assigning values to cells in a georeferenced grid. Right now I'm storing the values in a multidimensional ...
2
votes
1answer
59 views

Control to select data source on Leaflet map

I am building a map using leaflet. My data source looks something like this: var districts = {"type": "FeatureCollection", "features": [ {"type":"Feature", "geometry": ...
0
votes
1answer
212 views

Adding drop-down menu on leaflet map instead of L.control

I have created a choropleth map including several layers from the same geojson layer which is turkeyData in my case.I actually did it and it works fine. But I like to change the standart leaflet ...
0
votes
1answer
32 views

Automatically select the default feature in TemplatePicker ARCGIS Javascript

I am using this example to implement the editing on my map. Editing Without Widget ARCGIS Javascript The code employs a templatepicker which uses the layers on the map to show the features which can ...
0
votes
1answer
97 views

Configurable map viewer (CMV) - Find the area of drawn polygon

I am trying to get the area of a polygon and divide that by 16.94 ft^2. I have plugged in a Template I found. I am missing something. I am trying to get the template and my original code to talk. ...
1
vote
1answer
53 views

CartoDB SQL and returning values

Right I've got this JS function function AreaCompare(sql, UIDfield, Geogname, Table, sourceName, sourceID, destName, destID){ CompareObj = {}; CompareObj.sName = sourceName; ...
2
votes
2answers
90 views

Create a layer selector when making a map at runtime for CartoDB

Using the same theory to create a search box at runtime, (such as here), I wrote this code: var l = cdb.vis.Overlay.create('layer_selector', map.viz, {}) l.show(); $('#map').append(l.render().el); ...
0
votes
1answer
127 views

insert update delete wfs layer to gesoerver on openlayers3

i am using geoserver 2.5.2 and openlayers3 i can show geojson wfs data from geoserver with geojson and edit with interactions on map (function () { showData= function () { var format = ...
1
vote
1answer
3k views

Openlayers get coordinates of a circle vector after draw

I have made a openlayers map. I have made two features on the map. Navigate DRAW POLYGON I have made 40 sides to my polygon which turns out to be a circle. After I have drawn my circle I want to ...
0
votes
0answers
29 views

Get latlong at a distance on a path

I have 2 decimal point in lat/lon. I want to divide the line drawn by lat/lon into parts each at a specified distance, lets say 'x' -- all except the last segment will be of length x -- and I need the ...
1
vote
2answers
349 views

Getting value coded of domain from map layer with arcgis javascript api

I'm trying to read domain values on a map, how to achieve this objective in arcgis javascript api? any help?
2
votes
4answers
2k views

Formula to Check Latitude & Longitude is within Area without Google Maps Api

I got this Example Map SampleMap: http://techinfo.co.id/test/map.php I make Boundary Polygon shape , -6.875165174925262, 107.56293296813965 -6.882663904407988, 107.66730308532715 ...
0
votes
1answer
133 views

Problem with Cesiumjs sand castle live editor

I have saved a html file from Cesium SandCastle live editor, but I am not able to run that file on a web browser afterwards, even after loading all the JavaScript files correctly. How to make it run ...
0
votes
2answers
112 views

Javascript + ESRI + Dropdown menu with layers

Dear people of stackoverflow, I have a script that generates a basemap with a layer that I have put on top of it. I am trying to create a dropdown menu in which the user of my HTML5 page can select ...
1
vote
1answer
50 views

The ordering of layers with CartoDB/Leaflet

Just want to get a bit of clarity about this query from before: Layer order in CartoDB I have a map with a Basemap and I want to draw points between features based on layer featureclicks, The good ...
0
votes
1answer
120 views

Setting properties of geoJSON in OpenLayers

I have a map with layers that have similar attributes. I want to add a function that when you select a feature in a layer, it searches for a feature with similar properties in another feature (in this ...
0
votes
1answer
55 views

esri JavaScript Spatial Analysis Services: Select appropriate helper services url from Portal for requested operation

About 6 months ago I built a prototype JavaScript app which uses the spatial analysis service; FindNearest. Find Nearest. I've posted this on GeoNet but haven't had much joy there. The app ran fine ...
1
vote
1answer
64 views

set definition expression based on slider values

Using the Esri JavaScript API I want to control the set.DefinitionExpression values based on a user controlled range slider. The data is loaded from REST as ondemand using: var POP_Total = new ...
0
votes
3answers
266 views

Measure Widget Issue - ArcGIS Javascript API 3.11

I am having an issue with the Measure Widget in my application after updating to 3.11. The widget does not appear after the application loads. I have checked my code and do not see an issue, also ...
1
vote
1answer
69 views

Showing link for every city at different zoom levels using Leaflet?

I have a Leaflet map that I am using to render a map of the U.S. The map will have specific zoom levels. For example, when the map first loads it will show major U.S. cities. Then if you zoom in it ...
0
votes
1answer
71 views

Configurable Map Viewer (CMV) - average the values of the points

I have been able to select points and find the sum of the points. What I really need is to average the points. Here is my (acquired from someone else) code for finding the sum. define([ ...
0
votes
0answers
37 views

Custom tile area in OpenLayers for every zoom level with a custom tile resolution

For an extend min_x, min_y, max_x, max_y in EPSG:3857 somewhere on the map (eg. france) I have an image cut into n x m tiles and requestable under an URL: http://localhost/map/{x}/{y}.jpeg How do I ...
0
votes
0answers
71 views

API for Java and JavaScript app integration

Are there any APIs to make calls or integrate JavaScript functions to a Java written application? I have come across Rhino's liveconnect.js, but this is uncharted territory for me, and would like a ...
2
votes
2answers
100 views

Javascript API: How can I change renderer on the fly with feature layer hosted on ArcGIS Online?

I am new to Javascript and somewhat new to GIS (especially web applications of GIS). I'm trying to understand how I can have a drop down menu or html buttons to change which data is rendered in my ...
2
votes
1answer
93 views

SQL query as part of featureClick in CartoDB.js

I am a complete novice at both Javascript and SQL so am learning as I'm going with this! I have made a webpage that shows a map with a layer of points on the left hand side of the page. What I want ...
0
votes
0answers
39 views

Any way to make leaflet.draw polyline finite (i.e. max) distance?

Does anyone have an idea of how I could force a maximum distance when creating a polyline with leaflet.draw? In other words, I would like for the user to only be able to draw a line UP TO 1000 miles. ...
0
votes
0answers
121 views

Adding and removing OpenLayers 3 layers based on a key

I have a map with potentially tens of thousands of areas on it so I draw the map using an ImageWMS layer via GeoServer. I want the user to be able to click on the map and then highlight the area if it ...
0
votes
0answers
106 views

ArcGIS API Javascript Server creating a dropdown menu

I am trying to rebuild this ESRI example with my own feature layers: https://developers.arcgis.com/javascript/jssamples/dataadapterfeaturelayer.html Since I just want a dropdown menu existing out of ...
1
vote
1answer
67 views

Projection Transform in OpenLayers3

I am trying to transform a GeoJSON object of a certain transformation (EPSG:28992) into my current map coordinate system (EPSG:4326). I have been trying to do a couple of things but none seem to work. ...
2
votes
2answers
91 views

How to prevent ArcGIS JS map from failing when using a Bootstrap “hidden” class?

I'm trying to put an ArcGIS Server JS API map within a div with a hidden-sm class in Bootstrap 3, so that the map is not shown on small devices. <div class="row"> <div class="col-md-4 ...
1
vote
1answer
373 views

select tolerance or snapping in OL3 (Openlayers 3)

I'm using openlayers3 in a mobile application , my problem is that I find a big difficulties to select features using my finger even with a touch pen (I have to be more precise in my click or ...
0
votes
0answers
35 views

Legend label failed to send to the print service using ArcGIS javascript

I am try to print my map with legend to PDF format; however, the legend label in the PDF is saying Override 1 instead of the label I specified in class breaks. There are other maps I can print ...
1
vote
1answer
88 views

Configurable Map Viewer (CMV) - select by drawing polygon around points, then average the values of the points

I have seen this question and have tried the code suggested: Adapting ESRI ArcGIS API for JavaScript Feature Layer With Selection sample for use in Configurable Map Viewer (CMV) But I have been ...
0
votes
1answer
375 views

Line dash not working OL3 (Openlayers 3)

I want to display a dashed line in a vector layer, as the it's shown in the Documentation there is a propriety called lineDash , but it didn't work for me here my code : var iconStyle_line = new ...
1
vote
1answer
244 views

Leaflet.js add/remove control from Map

I am attempting to combine two fine plugins Leaflet Easy Button and Leaflet Routing Machineand i can't quite get it to work. what I want seems simple enough, I would like to have a button that when ...