[OpenLayers-Users] adding feature to vectorlayer from wkt

[karsten vennemann]

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 
 <http://www.terragis.net/> www.terragis.net

_______________________________________________
Users mailing list
Users at openlayers.org
http://openlayers.org/mailman/listinfo/users





-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.osgeo.org/pipermail/openlayers-users/attachments/20090918/4d670030/attachment.html