[postgis-devel] GIS problem

Markus Schaber schabi at logix-tt.com
Thu Dec 14 02:17:41 PST 2006

Hi, zhang,

"zhang Jackie" <jackieict at gmail.com> wrote:

> not exactly. My problem is about behaviour of human. When some person use a
> GIS application, do behavour of  person have laws. and when their operation
> in GIS application is mapped to spatial computing :interset , contains ,
> distance, ...defined by OpenGIS, Do same computing operation on same spatial
> object is performed regularly, and then I can cache the result of these
> computing operations.

You can simly use some LRU-alike caching scheme, and then you will
automatically get a very good caching behaviour. And you get the proof
or disproof of your assumption by looking which operations live long in
the cache.


Markus Schaber | Logical Tracking&Tracing International AG
Dipl. Inf.     | Software Development GIS

Fight against software patents in Europe! www.ffii.org

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