AW: [OpenLayers-Users] OpenLayers.Layer.GML and showing name= of OSMdata

[Arnd Wippermann]

You can get access to the attributes by feature.attributes["amenity"] ...

To get some labels from two attributes use a styleMap with context. With the
below code you should be able to show your labels.

Arnd

var styleMapLabelDS; //DS default and select style

function set_styleMapLabelDS()
{
    var context = {
        getName : function (ft){
            var label1 = "";
            var label2 = "";
            var theLabel = "";
            if(ft.attributes.name != undefined)
                label1 = ft.attributes.name;
            if(ft.attributes["karuia:CAP"] != undefined)
                label2 = ft.attributes["karuia:CAP"];
            if(label1 != "" && label2 != "")
                theLabel = label1 + ", " + label2;
            else if(label1 != "")
                theLabel = label1;
            else if(label2 != "")
                theLabel = label2;

            return theLabel;
        }
    };
    var template = {
        strokeColor: "#0000FF",
        strokeOpacity: 1,
        strokeWidth: 3,
        fillColor: "#00AAFF",
        fillOpacity: 1,
        pointRadius: 5,
        pointerEvents: "visiblePainted",

        label : "${getName}",

        labelXOffset: "10",
        labelYOffset: "-10",
        fontColor: "blue",
        fontSize: 10,
        fontFamily: "Arial",
        fontWeight: "bold",
        labelAlign: "lt"
    };
    var templateB = {
        strokeColor: "#FFFF00",
        strokeOpacity: 1,
        strokeWidth: 3,
        fillColor: "#FFFF00",
        fillOpacity: 1,
        pointRadius: 5,
        pointerEvents: "visiblePainted",

        label : "${getName}",

        labelXOffset: "10",
        labelYOffset: "-10",
        fontColor: "red",
        fontSize: 10,
        fontFamily: "Arial",
        fontWeight: "bold",
        labelAlign: "lt"
    };
    styleMapLabelDS = new OpenLayers.StyleMap( { "default" : new
OpenLayers.Style(template, {context:context}), "select" : new
OpenLayers.Style(templateB, {context:context}) } );
}

set_styleMapLabelDS();
Transports["styleMap"]=styleMapLabelDS;
Transports.redraw();


-----Ursprüngliche Nachricht-----
Von: openlayers-users-bounces at lists.osgeo.org
[mailto:openlayers-users-bounces at lists.osgeo.org] Im Auftrag von Hendrik
Oesterlin
Gesendet: Donnerstag, 26. Mai 2011 12:07
An: openlayers-users at lists.osgeo.org
Betreff: [OpenLayers-Users] OpenLayers.Layer.GML and showing name= of
OSMdata

Hello,

I'm trying to make an overlay to display some circle and the name of bus
stops using OpenStreetMap data.

I have extracted the amenity=bus_station and highway=bus_stop using osmosis.

I have figured out how to put some circle over the map to show the bus stops
using this code:

var Transports = new OpenLayers.Layer.GML("Transports", "arrets-bus.osm",
{format: OpenLayers.Format.OSM, styleMap:new OpenLayers.StyleMap({
"default": {
pointRadius: 4,
fillColor: "#00DD00",
strokeColor: "#ff0000",
fillOpacity: 0.2
}
})
});
map.addLayer(Transports);

An example is here: http://oesterlin.ile.nc/test/20110526atelier.html

I was not able to display any name= or other custom key beside or below the
circles. In this example, displaying "name=" and "karuia:MNCP=" would be
useful.

Is there a possibility to make OpenLayers filter by itself the required key
from an OpenStreetMap-XML file and display the contents?

Can someone give me some hints or even better some example how to do this?

Many thanks!

Hendrik Oesterlin

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