On Wed, Jun 10, 2015 at 7:41 PM, Martin Davis <mtnclimb@anonymised.com> wrote:
We're looking for ways to improve performance of Identify operations in a
web map client (using OpenLayers). We are seeing poor performance due to
the network latency of retrieving large GetFeatureInfo reponses. Is there
any way to reduce the size of geometries returned in GetFeatureInfo
responses?
In order of decreasing preference, things that might work for us include:
1. simplify the geometry
2. provide only the bounding box rather than full geometry
3. eliminate the geometry entirely
Does the WMS vendor parameter propertyName [1] allow removing the geometry
from the response? In any case this isn't ideal for us, because we'd
prefer to not have to specify the required properties explicitly.
Yeah, you can get whatever property you want, but you have to list
explicitly the ones you require
The #2 option of returning only BBOX would be ideal - is that possible?
Not without changing the code, I guess you could roll a new vendor option,
e.g., &geometry=none|bbox|standard
Simplifying would require yet another param to specify how much to simplify
it.
Cheers
Andrea
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