[OpenLayers-Users] simple gazetteer test with geojson

[Eric Lemoine]

On Thursday, September 20, 2012, Gery . wrote:

>
> Hello,
>
> I'm testing this very nice example:
> http://ian01.geog.psu.edu/geoserver/www/search/gazetteer.html(congratulations to the author btw) but using in the protocol geojson
> (without geojson) instead of the default configuration using WFS and XML
> (loaded in geoserver). It works actually nicely, the results appear in
> the map and the grid, but the problem is that once I look for one feature,
> it just appears the whole geojson in the map, so I understand that the code
> (formPanel and name_like) doesn't "fetch" actually the feature I searched
> for. I've read somewhere that this problem is either a filter in the
> geojson output or the geojson deserialization, but not sure if this is
> right. This is basically the part I changed in the original code:
>
>  // define the data source
>     var protocol = new OpenLayers.Protocol.HTTP({
>         url: '
> http://localhost/postgis_geojson.php?geotable=boreholes_point_wgs84&geomfield=geom
> ',
>         format: new OpenLayers.Format.GeoJSON({
>             ignoreExtraDims: true,
>             'internalProjection': new OpenLayers.Projection("EPSG:900913"),
>             'externalProjection': new OpenLayers.Projection("EPSG:4326")
>         })
>     });
>
> BTW, I'm using the cool script postgis_geojson.php to get my postgis table
> as geojson.
>
> Any help is appreciated, thanks in advance,
>


For name__like to be taken into account (1) your postgis_geojson.php script
needs to support comparison filters in the requests, and (2) Protocol.HTTP
object needs to have a filterToParams format. By default, if no
filterToParams format is passed to the constructor, an Protocol.HTTP
instance is configured with QueryStringFilter format, which, for example,
converts a LIKE filter on attribute "name" into name__like=%value% in the
query string.

Hope it helps

>

-- 
Eric Lemoine

Camptocamp France SAS
Savoie Technolac, BP 352
73377 Le Bourget du Lac, Cedex

Tel : 00 33 4 79 44 44 96
Mail : eric.lemoine at camptocamp.com
http://www.camptocamp.com
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