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

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25 views

feature position on non-Geo-referenced Image

I use OpenLayers to show Map , when im creating the map, i want to show map image with an ImageLayer and VectorLayers, the image is non Geo-referenced. The use case: i receiving a map image url from ...
0
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0answers
97 views

Print OpenLayers map with osm as background and all the vectors

I looking for an answer for a while, and i could not find a working solution. I am trying to exeport the OpenLayers map to some file - image or pdf, and i need all the background, include OSM and all ...
2
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0answers
26 views

Make InfoTemplate moveable but still highlight attributes

I’m using the esri/InfoTemplate in the Javascript API to identify features. However, it gets anchored to the mouse click and cannot be moved around. Based on this answer I used dojo/dnd/Moveable to ...
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0answers
66 views

Land Parcel and JSON Data with onclick event

I currently am working on a school project and have been introduced to javascript with little knowledge. What the project entails is a webapp of land parcels that contain information about each one, I ...
4
votes
1answer
94 views

Show markers only at certain zoom levels

I'm building a cycle touring map in leaflet.js, with subjective information overlaid as markers, along the lines of "this is a great road", "this town is quite nice" etc. To avoid information ...
1
vote
1answer
64 views

Openlayers - ModifyFeature - How to label vertices with a progressive number

Apologize in advance as I am quite new in openlayer and javascript. I have a control ModifyFeature on a path vector layer. I would like the vertices to be rendered with a stylemap label showing ...
1
vote
1answer
158 views

Function to add layer with button click

I'm working with openlayers and geoserver to create a map and overlay layers. I need to add a layer when a button is clicked, but what I get is that the layer is added ( i can see it through the layer ...
1
vote
1answer
1k views

How to add a WMS layer on Cesium Globe?

I downloaded Cesium Java Script library for creating 3D Globes from "http://cesium.agi.com/". Also I found that, they are using Bing satellite map as default. But I need to display layer from My ...
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2answers
58 views

queryTask - execute vs executeForIds

When setting up a queryTask, what's the difference between queryTask.execute() and queryTask.executeForIds()? In ESRI's JS API Reference, they have the exact same descriptions: ...
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0answers
33 views

web map with arcGIS for server and javascript?

How would I go about creating a feature layer from Arcmap, and saving it as a service to arcGIS for server, which I could call from javascript API, so the web map will provide user interaction. For ...
0
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0answers
37 views

map stops at map.graphics.add(graphic);

function getLocRes(results) { //map.graphics.clear(); var symbol = new esri.symbol.SimpleFillSymbol(esri.symbol.SimpleFillSymbol.STYLE_SOLID, new ...
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0answers
38 views

Is there a way to create a named symbol in OpenLayers composed as either a multi-dimensional array or as a MultiPolygon?

OpenLayers provides a minimal set of "well-known" shapes which can be used as point icons: /** * Constant: OpenLayers.Renderer.symbol * Coordinate arrays for well known (named) symbols. */ ...
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1answer
38 views

ArcGIS JS - Feature Layer selection symbol before layers loaded

I have a feature layer that is dynamic and could pull a geometryType: esriGeometryPoint or geometryType: esriGeomertyPolygon I was wondering how would I know when to set the selection symbol to ...
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0answers
24 views

Display one of many rasters in Web Map

I would like to interactively add a georeferenced tif to my webmap. Use case is: I have a raster catalog of georeferenced tax maps. I would like to be able to select those tax maps (there are ...
0
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0answers
39 views

Query results feature set to a brand new Features set

Here what I am trying to do: 1) My overall goal is to query an extent and to extract data by this extent. I can successfully achieve the first part. 2) Here is my issue: The Dynamic layer queried has ...
1
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1answer
142 views

How do I plot a line on a map, or obtain the latitude and longitude coordinates of such a line, that is 120km north of the US-Canada border?

How do I plot a line on a map, or obtain the latitude and longitude coordinates of such a line, that is 120km north of the US-Canada border, including parts of the border that cross water? (I managed ...
0
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0answers
30 views

Access multiple feature servers through ArcGIS REST API

we are adapting a web app to support an ArcGIS server back end through the use of Javascript ajax calls which in turn display the data using Leaflet. The current version of the application runs ...
9
votes
4answers
993 views

what is the right way to delete all features from featureLayer

I have a featureLayer and I don't want to kill it and create another one. I want to delete all features from the current featureLayer. I found that I can use applyEdits method but in order to use it I ...
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0answers
20 views

How to run GeoAdmin3

I coloned Geoadmin repo from github. I tried tu run this localy but no sucess. I have my own rc_ file but still it's not working. Anyone can help me?
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0answers
77 views

Customizing map.on(“click”) while using default editor widget

My question is whether or not it is possible to use the default editor widget in my case given the needs of my application. My map consists of points displayed from four different FeatureLayers. They ...
0
votes
2answers
100 views

ArcGIS Javascript API - switch case to display attributes in a popup

var vliTemplate = new InfoTemplate("Visual", "<tr><b>VLI Number:</b> <td>${VLI_VLI_NO} </tr></td>"+ "<br><tr><b>Not Greened Up ...
0
votes
1answer
51 views

Drop Marker with 3857 projection in leafletjs

Is it possible in leaflet to drop marker with 3857 projection on map? I fond a solution where first translate point to 4326 using proj4js and than drop it on map. var source = new ...
1
vote
1answer
77 views

Opacity contrl for mapbox map with several layers

This is an example of how opacity can be changed for a Mapbox.JS map: https://www.mapbox.com/mapbox.js/example/v1.0.0/opacity/ The example shows only one layer used. With barely any experience in ...
0
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1answer
65 views

get and change style property openlayers

i need to change the property of some style after its created, and i need to change it with knowing only the string of the property name. i am getting string like "fillColor" and value like "blue", ...
0
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0answers
29 views

Customize LabelLayer extent based on density/location using ArcGIS JavaScript API

I'm using a LabelLayer that can be seen only within a certain minScale - maxScale window. I'm trying to display labels of census tract IDs within Illinois, and the difference in label density between ...
0
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0answers
37 views

Openlayers WFS change featureType

I am trying to change wfs featuretype "on the fly" in openlayers. (This method http://dev.openlayers.org/docs/files/OpenLayers/Protocol/WFS/v1-js.html#OpenLayers.Protocol.WFS.v1.setFeatureType) This ...
1
vote
1answer
332 views

ESRI JS API - How to get event object from Draw Toolbar onDrawEnd

I am using the Draw Toolbar in the Esri Javascript API v3.4 and connecting to the onDrawEnd event using aspect.after(drawingToolbar, "onDrawEnd", drawEndHandleFunction, true); I am using the Draw ...
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0answers
41 views

GP clip and ship crash. Any idea?

I have been trying to implement this code for a few weeks but always run into new issues. It seems like everything is working fine now except my clip and ship GP. It always returns the GPerrorFailed ...
0
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0answers
43 views

Handling Popups in Leaflet with Overlapping Features

I am new to Leaflet as well as Javascript, and I'm looking for some advice on a basic topic. Currently, I am trying to create a spatial index of library holdings for old topographic maps that people ...
0
votes
2answers
86 views

MapServer: Symbol color is set in mapfile. Is there a way to change it using javascript (ie not in mapfile)?

I have a mapfile where the symbol color is set to blue. In my html I have a hover event that brings a popup when the user puts their cursor over the symbol. Working as intended. Now on that same ...
0
votes
1answer
43 views

How can i figure out to convert this points to latlong?

I got below data in sql server, Learned that data is collected under zone IIIa considering Lambert Conformal conic projection in India. The data is generated from Spatial Cadastre Software. Also ...
2
votes
2answers
164 views

District border join in Google maps

I am developing a district editor for cities. The idea is that we divide the city into districts. I am using GoogleMaps, but any other js library is acceptible. Problem 1: districts are connected ...
0
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0answers
28 views

How can I use the SLD and SLD_body arguments?

How can I use the SLD and SLD_body arguments of a GetMap request with the mapA.overlayMapTypes.ImageMapType object? var wmsOptions = { alt: "", getTileUrl: function (tile, zoom) { return ...
0
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0answers
164 views

Help needed with query task results to show in dojo Grid?

I am trying to create a search widget where the HTML tempalte of the search is as follows: <div class="gis_SearchDijit"> <div class="formContainer"> <div ...
1
vote
1answer
110 views

Web API for reverse geocoding geographic features

Is there a free web API that can reverse geocode geographic feature names? I'm currently using the Google API, which will return political and street address info, but I would like to return the names ...
0
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0answers
34 views

ArcGIS ApplyEdits w/ JavaScript

I'm new to ArcGIS API. In a form, how can you submit data to modify a feature using applyEdits? No map is involved with this. I have a form that populates the editable data with javascript. When the ...
0
votes
1answer
38 views

Select all features close to clicked

I have an openlayers map with more then 20000 features not in wms, only in vector layer. I have a control to select features, but sometimes it's really hard to select, specially the lines, and also ...
0
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0answers
39 views

openlayers setCenter issue (other posts on this do not solve it)

I can't get map.setCenter to display an OSM layer (via openlayers) centered at my specified coordinates. Instead it defaults to the West Coast of Africa. The zoom level does however work. Both of ...
1
vote
1answer
95 views

CartoDB/Javascript - Layer Selection Buttons help

I'm trying to make my own layer selector (due to the CartoDB one not appearing on mobile devices) and I'm having issues, mainly due to my lack of experience with Javascript. The issue seems to be ...
2
votes
2answers
1k views

Animated lines and line styles in Javascript

I'm using Leaflet library and Mapbox. I need to create animated line from one city to another, slow motion "travelling" from one point to another point. Is that possible in javascript and how? I can ...
1
vote
2answers
518 views

How to prevent automatic new line when labeling point feature class?

I have a point feature class that I am labelling with the string "EXIT" for a majority of points, but some points will be longer, such as "EXIT into Pacific". I wrote a labeling script that will ...
1
vote
1answer
111 views

Add line break to ArcMap 10.2 label expression

How can I add a line break to a jscript label expression? My expression so far looks like this function FindLabel ( [NAME] ) { return [NAME]+'National Forest'; } I would like to add a break after ...
0
votes
1answer
18 views

Decarta - how to refresh map

I am using the Decarta JS API. I am displaying a map with layers. I want to refresh the map and redraw new layers, but I see no way to do this in the documentation. Is there a way to refresh the ...
0
votes
0answers
36 views

ArcGIS JavaScript problem with legend to show attributes

I'm running a geoprocessing task in my webapplication. When the task generated some results i destroy an existing legend and build up a new one that shows the legend for the resulting layers. That is ...
3
votes
3answers
1k views

How to add a polygon from PostGIS ST_AsGeoJSON into Leaflet?

I try to use the following function to add polygons to my Leaflet map. function polygon(geojson) { alert(geojson); // alert for testing layer = L.geoJson(geojson); layer.addTo(map); } ...
1
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0answers
44 views

Multi layer, multi control

I am new to GIS technolgies. I'm working on the final project of my career. I need to have a background map of somewhere on this map I need to create 1 .. N layers in which a particular user can ...
0
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0answers
706 views

Acess control allow origin header is present on the request resource. Origin null is therefore not allowed acess

I'm trying to use the openlayers vector class. And the error occurred: Acess control allow origin header is present on the request resource. Origin null is therefore not allowed acess I've put ...
0
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1answer
55 views

OpenLayers/Leaflet render world borders

I am trying to show all world borders. Either using OpenLayers or Leaflet. World borders are taken from here. This code does not work. What I am doing wrong? var Map = { map: null, layer: null, ...
6
votes
3answers
1k views

tiny JS discretization library for choropleth representation

I would like to know if a tiny stat/discretization js library ready to use exists. I do know about the existence of jStat (which I may explore a little bit more thoroughly), and I know that mapfish ...
4
votes
5answers
1k views

How to get a Leaflet app with a big GeoJSON file to work on mobile devices?

I have a leaflet app which displays a GeoJSON file as a layer. It works fine in the web browser. On the mobile browser it starts up, but quits after panning around on the map. I think the reason for ...