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How to add feature to vector layer in OpenLayers 3?
I am using the following code to add a feature to a vector layer in OpenLayers 3 (OL3):
How does the event handler work in OpenLayers?
The callback gets passed 2 arguments: the feature and the layer the feature is in. Good to know is the .getEventPixel (event) function, if you don’t work with openlayers event handlers but with handlers on the viewport.
How to check if a feature got clicked?
For checking if a feature did get clicked, there is the .forEachFeatureAtPixel (pixel, callback) function of ol.Map. ( http://openlayers.org/en/master/apidoc/ol.Map.html#forEachFeatureAtPixel ) The callback is executed on every feature at the pixel. The callback gets passed 2 arguments: the feature and the layer the feature is in.
How to add event handler in OpenLayers 3?
And it has some unintuitive caveats caused by openlayers internally moving the selected features to another so called unmanaged layer. Anyhow this works by adding a listener to the collection belonging to the interaction. The collection can be retrieved with .getFeatures ().
How to retrieve the source features in OpenLayers?
For 1, to retrieve the source features, if I understand correctly you need to monitor the change event like this: If it is ‘ready’ you have asynchronously retrieved the source, correct?
How to add features outside of foreach in OpenLayers?
This creates a huge stack size, so something is clearly going wrong. Try to add features outside of forEach. Because features of the source are increasing every loop in your code. Try to code like this:
How to use hover and click events in OpenLayers?
This example from a userlist was very helpful in showing how to have both hover and click events assigned to a vector layer. this example shows a popup after you draw a polygon, then click on it, but you should be able to change it to respond to hover instead. http://openlayers.org/dev/examples/select-feature-openpopup.html
Which is the latest version of OpenLayers for hit detection?
This example uses OpenLayers v 6.6.1. The latest is v 6.6.1 . Example of hit detection on a countries vector layer with country information. The countries are loaded from a GeoJSON file.
Do you need The OpenLayers 3 API documentation?
Don’t be afraid to use OpenLayers 3 API documentation: Although it’s overwhelming at first, it’s vital to learn how to do new things with OpenLayers. Thanks! Thanks for submitting a tip for review!
How to use vector layer and tile layer together?
To use a vector layer and a tile layer together on the same map means we have to transform the layers from one projection to another. Put the features into an array. We start by putting the features we want to transform together into an array that we can iterative through. Write the transform function.
How do you set a point in OpenLayers?
Set the point’s geometry. To tell OpenLayers where to place the point, you need to create a geometry and give it a set of coordinates, which is an array in the form of [longitude (E-W), latitude (N-S)].
Which is the best way to use OpenLayers?
1. Getting Started with OpenLayers 1.1. Creating your first map 2. Key Concepts in OpenLayers 2.1. Creating a map 2.2. Overlaying information 2.3. Using bindTo 3. Charting the Map Class
How to use foreachfeatureatpixel in OpenLayers 3?
Using OSM layer and MapQuest layers to create a map 4.3. Creating a Stamen layer 4.4. Creating a Bing Maps layer 4.5. Creating tiles and adding Zoomify layer 4.6. Playing with various sources and layers together 4.7.
Which is an example of an OpenLayers map?
When using Single-click or Click you can hold do Shift key to toggle the feature in the selection. Example of a map with a semi-transparent layer. The three maps, one WebGL, one Canvas, one DOM, share the same center, resolution, rotation and layers.
Which is an example of OL3 and D3?
Example of using ol3 and d3 together. Example of using the drag-and-drop interaction with a ol.source.ImageVector. Drag and drop GPX, GeoJSON, IGC, KML, or TopoJSON files on to the map. Each file is rendered to an image on the client.