Hmmmm... the mystery deepens. Turns out, when I do the following
var lyrs = map.getLayersByName("a_layer");
map.removeLayer(lyres[0]);
The layer does get removed from the layer switcher, but its features remain
drawn on the map. That's not good because subsequent drawing of that layer
results in twice as many features on the map.
On the other hand, if I do the following
var lyrs = map.getLayersByName("a_layer");
lyrs[0].removeAllFeatures();
Then the features get removed from the layer but the layer itself remains in
the layer switcher. That's not good because while my map now looks fine, the
layer switcher now has two layers (and more if I rinse, lather, repeat) called
"a_layer".
I am not sure what the right terminology is, but I effectively want to remove
the layer so its features disappear. Then I can redraw that layer.
Suggestions?
On Sep 25, 2011, at 9:42 PM, Puneet Kishor wrote:
> Am at my wit's end trying to remove a layer. Would welcome any suggestion on
> the following. Essentially, I want to remove a layer called "foo" from my
> map, so I may redraw "foo" with new data.
>
>
> On Sep 25, 2011, at 9:04 AM, Mr. Puneet Kishor wrote:
>
>> I spoke too soon...
>>
>> On Sep 24, 2011, at 3:58 PM, Mr. Puneet Kishor wrote:
>>
>>> I would like to remove a layer by name. The only method I see for removing
>>> layer seems to take a layer object, which implies something like so
>>>
>>> var lyr_list = map.getLayersByName(name);
>>>
>>> Why does the above return a list? Under what use case would one have more
>>> than one layer by the same name? In any case, I have all layers with unique
>>> names, so the list would always have only one element.
>>>
>>> map.removeLayer(lyr_list[0]);
>>>
>>> The above works, but is there a more efficient or better way?
>>
>>
>> Here is my code that does not work
>>
>> var lyrs = map.getLayersByName("a_layer");
>> alert("got " + typeof(lyrs[0]) +
>> " called " + lyrs[0].name +
>> " with id " + lyrs[0].id);
>> map.removeLayer(lyrs[0]);
>>
>> The alert window shows the correctly that it got an object with the right
>> layer name and id. Yet, the layer is not removed from the map... at least,
>> it is still visible, so when the new layer draws, I see a mess of features.
>>
>> What is my error?
>>
>> Thanks,
>>
>> Puneet.
>
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