[GIS] How to integrate OpenLayers and ArcGIS Server

arcgis-serverfeaturesopenlayers-2popup

I am using the OpenLayers JavaScript API within a web application. I am displaying non-base layers hosted on an ArcGIS server. When I load the ArcGIS layers, I load them using OpenLayers.Layer.ArcGIS93Rest and by specifying the export service URL. The layer loads perfectly. However, when the user clicks on a feature, I want to be able to display a popup showing information about the feature that the user clicked on. Can anyone explain the best way to retrieve feature information?

Thanks in advance!

Best Answer

rest will solve your problems with only parsing it then adding to map. the following link has a query with geometry which return to results json.

filter geometry is -125.4,35.2,-118.7,43.8

http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Specialty/ESRI_StateCityHighway_USA/MapServer/1/query?text=&geometry=-125.4%2C35.2%2C-118.7%2C43.8&geometryType=esriGeometryEnvelope&inSR=&spatialRel=esriSpatialRelIntersects&relationParam=&objectIds=&where=&time=&returnCountOnly=false&returnIdsOnly=false&returnGeometry=true&maxAllowableOffset=&outSR=&outFields=&f=pjson

you can get more information here ArcGIS Server REST API. and you can also get another info here ArcGIS Server REST API, OpenLayers

i hope it helps you...

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[GIS] How to add vertices to a polygon on mouse click in OpenLayers

I did the similar work but a more complex algorithm for lines, and I think I get some inspiration from it. Your requirements are pretty much the same as what modifyFeature control can do, but you want to do it in a simpler way (from user point of view). It's possible but there's some trade off between the simplicity of manual work and that of computational work. It's actually often the case when it comes to computational geometry.

The modifyFeature control requires you to select one of the virtual vertices on edges, which implies that the new vertex will be inserted into that selected edge, so it's a deterministic process. Without this selecting process (by only clicking), you will need some extra computation to decide which edge (probably the nearest one, and the distance calculation to each edge is the extra work) to insert. For a simple polygon, the calculation is not a big problem, but the real use cases could be complex, e.g. a polygon has many edges and many of there's some cross over between edges. In such cases, it's possible when you want to insert the vertex to edge A, but end up with edge B. Moreover you will get some limitations on reshaping the polygon, following picture is a example (blue cross is where you clicked).

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So I would suggest taking a deterministic way (maybe not exactly the same as how modifyFeature does), with less computation and you won't expect some 'special cases' (it's always about special cases). But if such special cases won't appear in your problem, then I don't see why not make users happy if it's a request from users or customers.

ArcGIS Maps SDK – How to Temporarily Disable a Feature Layer’s Popup and Restore It Later

The answer I came up with is to watch the view's popup, and close it where necessary:

view.popup.watch("visible", (visible) => {
  if (visible){
    view.popup.visible = condition_goes_here;
  }
});

Using this approach the popup is not shown when clicking on the feature layer when the condition is met. Otherwise, the popup shows as usual.

Best Answer

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[GIS] How to add vertices to a polygon on mouse click in OpenLayers

ArcGIS Maps SDK – How to Temporarily Disable a Feature Layer’s Popup and Restore It Later

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