Hi Jan,
I'm also still learning OL ;)
I'm using
displayOutsideMaxExtent: true
I believe it makes it possible to zoom beyond the extent.
I have no experience with geoJson and how to read it's values.
But if you've loaded it as a layer you can read the attributes:
showAttributes(yourLayer.features);
function showAttributes(features){ if (features.length == 0) {
document.getElementById('progress').innerHTML = 'Error no features
found!'; return; } var data = '<h2>Number of features: ' +
features.length + '</h2>'; data += "<table id='attributeInfo'
class='tablesorter'>"; data += getTableHeaders(features[0]); data +=
'<tbody>'; var featureID; for (featureID in features) { var
myFeature = features[featureID]; data += '<tr>'; var key = 0;
for(key in myFeature.attributes) { data += '<td>' +
formatString(myFeature.attributes[key],2) + '</td>'; } data +=
'</tr>'; } data += "</tbody></table>";
document.getElementById('attributen').innerHTML = data; }
I hope it helps.
Your from Germany, right? Interested in going to the 4-day Open Source GIS
conference in Velp (near Arnhem)?
Regards
Paul Meems
Organizing the International Open Source GIS conference in The Netherlands:
http://www.mapwindow.org/conference/2012/
Op 22 april 2012 18:51 schreef Jan Tappenbeck <[email protected]> het
volgende:
> Hi !
>
> thanks - and i read something about geojson at this weekend and i have
> some additional questions:
>
> * if a bbox is define - is it possible to zoom extant to this by ol ? how ?
>
>
> is it possible to iterate through the geojson-data -> get a list of all
> name-properties
>
> is it correct to define a name-property like this:
>
> ...
> { "type": "Feature",
> "geometry": {
> "type": "Polygon",
> "coordinates": [
> [ [100.0, 0.0], [101.0, 0.0], [101.0, 1.0],
> [100.0, 1.0], [100.0, 0.0] ]
> ]
> },
> "properties": {
> "name": "[the name]", <<<<<<<<<<<<---------------
> "prop1": {"this": "that"}
> }
> }
> ....
>
>
> regards Jan :-)
>
>
> Am 20.04.2012 13:05, schrieb Paul Meems (Top-X):
>
>> Hi Jan,
>>
>> I'm using a filter for this:
>>
>> filter: new OpenLayers.Filter.Comparison({
>> type: OpenLayers.Filter.Comparison.**EQUAL_TO,
>> property:"_adresid",
>> value:"-1"})
>>
>> and some javascript
>>
>> function changeFilter(newValue)
>> {
>> wfsLayer.destroyFeatures();
>> document.getElementById('**progress').innerHTML ="..";
>> wfsLayer.filter = new OpenLayers.Filter.Comparison({
>> type: OpenLayers.Filter.Comparison.**EQUAL_TO,
>> property:"_adresid",
>> value: newValue});
>> wfsLayer.refresh({force: true});
>> }
>>
>>
>> Regards
>>
>>
>> Paul Meems
>> Organizing the International Open Source GIS conference in The
>> Netherlands:
>> http://www.mapwindow.org/**conference/2012/<http://www.mapwindow.org/conference/2012/>
>>
>> Op 20 april 2012 11:33 schreef Jan Tappenbeck
>> <[email protected]
>> <mailto:[email protected]>> het volgende:
>>
>> hi !
>>
>> i want to make a map with a function to show streets via a search
>> dialog.
>>
>> when a user select a way-name it should be show via a openlayer-vector.
>>
>> i only found examples to define elements by the geojson-format and
>> show all elements in a bundle - but i only want to show the element
>> with the id=xxxx.
>>
>> did anyone now an expample for this situation ?
>>
>> regards Jan :-)
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>> >
>>
>>
>>
>>
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>
>
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