[Featureserver] How to save polylines/linestrings from OL?

Josh Livni josh at umbrellaconsulting.com
Tue Oct 14 02:21:30 EDT 2008


Are you using the refactor branch of featureserver?  Try upgrade to
http://svn.featureserver.org/branches/refactor/ -- Unlike the trunk, the
refactor branch uses the 1.0 geojson spec, which may be the cause of the
issue.

  -Josh

On Tue, Oct 14, 2008 at 2:04 AM, Frederik Ramm <frederik at remote.org> wrote:

> Hi,
>
>    I've been using OpenLayers for a while and am now starting to play
> with FeatureServer.
>
> I have two layers in OpenLayers, each with one Polyline on it. I want
> to save this full picture to FeatureServer. I generate an array
> containing the two polylines from the two layers:
>
> var feature_array = new Array();
> feature_array.push(first_layer.features[0]);
> feature_array.push(second_layer.features[0]);
>
> and let this run through OpenLayer's GeoJSON formatter, yielding:
>
>
> {"type":"FeatureCollection","features":[{"type":"Feature","id":"OpenLayers.Feature.Vector_429","properties":{},"geometry":{"type":"LineString","coordinates":[[946549.6300834444,6275193.970668824],[946534.0453547356,6275193.970668824],[946531.8189649201,6275173.60840275],[946371.5188982,6275046.345351336],[946337.009856059,6275002.227940855],[946163.3514504456,6274818.973470214],[946072.0694680078,6274812.186343908]]}},{"type":"Feature","id":"OpenLayers.Feature.Vector_456","properties":{},"geometry":{"type":"LineString","coordinates":[[946550.0753614076,6275195.83721234],[946550.6284395837,6275198.850473554],[946545.9565402488,6275200.842944701],[946547.6374645595,6275161.2553185765],[946527.655615965,6275159.100318105],[946502.9315570632,6275149.818550694],[946456.5001974597,6275115.016255822],[946350.2346115634,6274999.156698926],[946289.9328434088,6274939.802198524],[946174.0937813055,6274819.397665788],[946110.8309146966,6274812.932927536],[946072.4274498615,6274811.742776
> 886],[946072.4034264801,6274813.543768735]]}}]}
>
> If I try to save this to FeatureServer, I get an error message about the
> geometry type "LineString" that was created by OpenLayers:
>
> Unable to determine bounding box for feature with geometry LineString
>
> (this is from Feature.py). I then modified Feature.py to also accept
> LineString instead of Line, but then the same problem occurs again in
> the storage backends:
>
> An error occurred: Couldn't create WKT from geometry of type LineString
> ({u'type': u'LineString', u'coordinates': ... ). Only Point, Line,
> Polygon are supported.
>
> (this is from the SQLite backend but I have verified that neither does
> the PostGIS backend support the a GeoJSON type of "Linestring").
>
> Somehow this must work - http://featureserver.org/demo.html perfectly
> manages to upload polylines! So where is my mistake? (My FeatureServer
> installation is a few months old but I have confirmed that current SVN
> versions don't expect to receive LineString either. I'm using OpenLayers
> directly from http://openlayers.org/api/OpenLayers.js.)
>
> Bye
> Frederik
>
> --
> Frederik Ramm  ##  eMail frederik at remote.org  ##  N49°00'09" E008°23'33"
> _______________________________________________
> Featureserver mailing list
> Featureserver at openlayers.org
> http://featureserver.org/mailman/listinfo/featureserver
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.osgeo.org/pipermail/featureserver/attachments/20081014/75f80c26/attachment.html


More information about the Featureserver mailing list