[OpenLayers-Users] adding feature to vectorlayer from wkt

[Michael Shishcu]

OpenLayers.Geometry.fromWKT( ) recieves string as parameter
try  var thestreetgeom = new
OpenLayers.Geometry.fromWKT("LINESTRING((-1930473.64430529 1513488.44352758,
-1646969.91778704 1155135.05969326)));



2009/9/18 karsten vennemann <karsten at terragis.net>

>  ok added this in:
> var options1 = {units: 'm', projection: "EPSG:102003", maxExtent: new
> OpenLayers.Bounds(-2500000,-1500000,2500000,1500000)};
> vectorlayer = new OpenLayers.Layer.Vector("Vector Layer",{layers:
> 'basic'},options1);
> var thestreetgeom = new OpenLayers.Geometry.fromWKT({type:"LineString"},
> {coordinates:[[-1930473.64430529, 1513488.44352758], [-1646969.91778704,
> 1155135.05969326]]},{ style: "default" });
> vectorlayer.addFeatures(thestreetgeom);
> also added
>
> bounds1 = thestreetgeom.geometry.getBounds();
> map.zoomToExtent(bounds1);
>
> Still nothing shows. I was not sure which bounds to take since the wkt will
> be dynamically selected form the roads layer out of postgis. So I added the
> bounds ofr the whole map - no idea if this is valid but no errors there.
>
> To check the bounds again I added the two lines above to get the actuakl
> bounds and to zoom to the feature location.
>
> Using Firebug I found that the inital syntax of the linestirng had one
> point that was not recognized - no idea why but it said 'NaN' . The result
> was that
> thestreetgeom was undefined.
> Thus I changed it to the above notation for thestreetgeom and got an object
> now. However I get an error now:
> thestreetgeom.geometry is undefined
>
> So my feature  object has no geometry defined - no idea why...
> Karsten
>
>  ------------------------------
> *From:* Michael Shishcu [mailto:micklesh at gmail.com]
> *Sent:* Friday, September 18, 2009 00:17
>
> *To:* karsten vennemann
> *Cc:* users at openlayers.org
> *Subject:* Re: [OpenLayers-Users] adding feature to vectorlayer from wkt
>
> well, try to add the max extend of the layer and map units (the next is for
> meters)
> var options1 = {units: 'm', projection: "EPSG:102003", maxExtent: new
> OpenLayers.Bounds(xmin, ymin, xmax, ymax)};
>
> 2009/9/18 karsten vennemann <karsten at terragis.net>
>
>>  hmm I tried now
>>
>> var options1 = {projection: "EPSG:102003"};
>> vectorlayer = new OpenLayers.Layer.Vector("Vector Layer",{layers:
>> 'basic'},options1);
>> map.addLayer(vectorlayer);
>> var thestreetgeom = new
>> OpenLayers.Geometry.fromWKT("LINESTRING((-1930473.64430529 1513488.44352758,
>> -1646969.91778704 1155135.05969326))", { style: "default" });
>> vectorlayer.addFeatures(thestreetgeom);
>>
>>
>> but still nothing shows and no error...
>>
>> Karsten
>>
>>  ------------------------------
>> *From:* Michael Shishcu [mailto:micklesh at gmail.com]
>> *Sent:* Thursday, September 17, 2009 23:55
>> *To:* karsten vennemann
>> *Cc:* users at openlayers.org
>> *Subject:* Re: [OpenLayers-Users] adding feature to vectorlayer from wkt
>>
>>   Hi, Karsten
>> maybe your layer does not have the correct projection?
>> try
>>         var options = {..., projection: "EPSG:102003", ... };
>>         vectorlayer = new OpenLayers.Layer.Vector("Vector Layer",{layers:
>> 'basic'},options );
>>
>> regards, michael
>>
>> 2009/9/18 karsten vennemann <karsten at terragis.net>
>>
>>>  I am trying to add line features to a vector feature layer in my map
>>> (projection is EPSG:102003, as are the coordinates of the wkt below)
>>>
>>> vectorlayer = new OpenLayers.Layer.Vector("Vector Layer");
>>> map.addLayer(vectorlayer);
>>> var thestreetgeom = new
>>> OpenLayers.Geometry.fromWKT("LINESTRING((-1930473.64430529 1513488.44352758,
>>> -1646969.91778704 1155135.05969326))", { style: "default" });
>>> vectorlayer.addFeatures(thestreetgeom);
>>>
>>> I do not get any error but nothing shows on my map. Could this still be a
>>> projection problem or am I missing something else ?
>>>
>>> Karsten
>>> Terra GIS LTD
>>> Seattle, USA
>>> www.terragis.net
>>>
>>> _______________________________________________
>>> Users mailing list
>>> Users at openlayers.org
>>> http://openlayers.org/mailman/listinfo/users
>>>
>>>
>>
>
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