[Benchmarking] Coordination

Paul Ramsey pramsey at cleverelephant.ca
Mon Jun 15 13:50:24 EDT 2009


Devil is in the details, yes, I can see that's an interesting use
case. Where as two layers, one with a highways shape file, one with an
all-roads shape file -- less interesting. Make sure you describe the
storage set-up when you detail the use case.

P

On Mon, Jun 15, 2009 at 10:44 AM, Andrea Aime<aaime at opengeo.org> wrote:
> Paul Ramsey ha scritto:
>>>
>>> - using again the roads layer, what about a style dependent
>>>  on the zoom level test? Only highway scaled out, everything
>>>  deeper in?
>>
>> No, I think scale dependence doesn't tell us much.
>
> Consider the following situation:
> - highways are always displayed
> - other roads are displayed only as the zoom level reaches 1:100000
>
> What can a test jumping between the two levels tell
> us? Well, it can tell us:
> - if the map server is able to efficiently issue queries to
>  the storage so that only highways are retrieved when the
>  scale is lower than 1:100000 (e.g. 1:200000)
> - that shapefiles are no good for such an exercise because you
>  may need indexes on the attributes to quickly find highways?
>
> This may be obvious to us, maybe it's not as obvious to the audience?
> Cheers
> Andrea
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