Saturday 30 March 2019

Integrate GeoJSON file with openlayers.protocol.http


I've got a problem with (the title says it) integrating a geojson file in my openlayers map. I have to use the openlayers.protocol.http way. I examined lots of examples on the web (and on stackexchange) but I cannot figure out what the problem with my exact code is. it shows the layer in the layerswitcher, but it doesn't show the features.


I hope someone can find the error. Here's my code (relating geojson):


WebMapping - Übung 12












Ihr Browser unterstützt keine Inlineframes



Wikipedia-Integration in OpenLayers








Answer



Well, here is my working example. First of all, your code have some errors. Read carefully this to discover what was changed, because I don't have time to comment and explain in details.








And the file with GeoJSON:



{"type":"FeatureCollection",
    "features":[
        {"type":"Feature",
            "properties":{
                "name":"TRON-02",
                "color":"green",
                "size":15
            },
            "geometry":{
                "type":"Point",

                "coordinates":[8.692, 49.412]
            }
        }
    ]
}

Feel free to ask anything you don't understand. 1) Format your HTML correctly. 2) Your map don't call the correct DIV tag to render. 3) I put a projection in the vector. 4) CHanged the coordinates to my country (eheh) so you will know where to go the next Football World Cup.


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