The request may be adjusted to account for symboliser size at your current
scale. If you have a symbol of 16.x16 pixels, we want to expand the request
area for that layer by 8 pixels in each direction (in order to collect any
features that are "just" off-screen, but may end up being visible when drawn.
--
Jody Garnett
On 15 October 2013 at 2:08:59 AM, Jonathan Moules
(jonathanmou...@warwickshire.gov.uk) wrote:
Hi List,
While looking at my log for a single tile request, I see GeoServer is making
four separate requests to Oracle, one for each layer. This is as expected.
The weird thing is that for every one of the requests, a different bounding box
is supplied to Oracle. I have the following four (easiest to see with
wide-screen no word-wrap).
MDSYS.SDO_GEOMETRY(2003,27700,NULL,MDSYS.SDO_ELEM_INFO_ARRAY(1,1003,3),MDSYS.SDO_ORDINATE_ARRAY(410006.8,278115.6,411445.99999999994,279554.8))
MDSYS.SDO_GEOMETRY(2003,27700,NULL,MDSYS.SDO_ELEM_INFO_ARRAY(1,1003,3),MDSYS.SDO_ORDINATE_ARRAY(410002.6,278111.39999999997,411450.19999999995,279559.0))
MDSYS.SDO_GEOMETRY(2003,27700,NULL,MDSYS.SDO_ELEM_INFO_ARRAY(1,1003,3),MDSYS.SDO_ORDINATE_ARRAY(409999.8,278108.6,411452.99999999994,279561.8))
MDSYS.SDO_GEOMETRY(2003,27700,NULL,MDSYS.SDO_ELEM_INFO_ARRAY(1,1003,3),MDSYS.SDO_ORDINATE_ARRAY(409998.39999999997,278107.19999999995,411454.39999999997,279563.2))
The difference between them is 9metres on both width and height.
Two thoughts:
a) Doesn't this add scope for missing/adding features that shouldn't be there?
9m is several buildings zoomed out to 1:5000, the max denominator on our
detailed dataset.
b) Is there room for a (probably minor performance gain) optimisation to only
create it once?
Cheers,
Jonathan
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