[OpenLayers-Users] Make vector layer from JSON

[Arnd Wippermann]

Hello Robert,
 
I don't know ArcGis Server, but I would look, if you can get your data in
gml or kml. Otherwise you have to write your own parser.
 
Arnd

  _____  

Von: Robert Sanson [mailto:SansonR at asurequality.com] 
Gesendet: Sonntag, 7. März 2010 21:09
An: 'Hugo'; Arnd Wippermann
Cc: users at openlayers.org
Betreff: Re: [OpenLayers-Users] Make vector layer from JSON


I am wrestling with a similar problem. I am trying to read in data coming
from an ArcGIS Server in JSON format. Unfortunately, ArcGIS Server doesn't
serve GeoJSON. Here is a sample of what the data looks like:
 
{
  "results" : [
    {
      "layerId" : 0, 
      "layerName" : "Main_Gates", 
      "displayFieldName" : "road_name", 
      "foundFieldName" : "farm_id", 
      "value" : "AS00136", 
      "attributes" : {
        "point_location_id" : "232495", 
        "farm_id" : "AS00136", 
        "rapid_no" : "104", 
        "road_name" : "Winslow Willowby Rd", 
        "locality" : "Null", 
        "x_nztm" : "1492934.61", 
        "y_nztm" : "5131545.29", 
        "Shape" : "Point"
      }, 
      "geometryType" : "esriGeometryPoint", 
      "geometry" : 
      {
        "x" : 1492934.61, 
        "y" : 5131545.29, 
        "spatialReference" : {
          "wkid" : 2193
        }
      }
    }
  ]
}

Any ideas how to get OL to read this into a Vector layer?
 
Thanks,
 
Robert
>>> "Arnd Wippermann" <arnd.wippermann at web.de> 7/03/2010 10:43 a.m. >>>

Hi,
i would think, that you have to use geojson instead of json, to get the
geometry for the features.
Arnd

  _____  

Von: users-bounces at openlayers.org [mailto:users-bounces at openlayers.org] Im
Auftrag von Hugo
Gesendet: Samstag, 6. März 2010 19:14
An: openlayers
Betreff: [OpenLayers-Users] Make vector layer from JSON


Hello all,

I'm trying to create a vector layer based on a php query (which includes
the_geom) encoded in JSON. Until the moment i haven't been able to achieve
this.
Following, is the relevant part of the code:

var connect = new Ext.data.Connection();
connect.request({
    url: 'mfbase/geoquery.php',
    params: {
        species: species,
        datai: datai,
        dataf: dataf
    },
    success: function(response){
        var resp = response.responseText;
        var json = new OpenLayers.Format.JSON();
        var data = json.read(resp);
        //console.log(data[0].the_geom);
        
        var querylayer1 = new OpenLayers.Layer.Vector(
            'Query1',
            {
                isBaseLayer: false,
                projection: wgs,
                geometryName: 'the_geom',
            }
        );
        
        querylayer1.addFeatures(data);
        map.addLayer(querylayer1);
    }
})

Any suggestions are more than welcomed :)
Thanks to you all!

Cheers,


-- 
Hugo Martins
FMV-UTL
CIISA-Epidemiologia e Saúde Pública Veterinária
Av. da Universidade Técnica
1300-477 Lisboa
N 38°42'49.54", W 9°11'43.42"




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