[mapguide-users] Performance on prerendering tiles by use of MgCooker

[Trevor Wekel]

For a rough estimate of the number of tiles at 1:1000,

Assuming the computer monitor has a 0.25mm pixel size, there are 4000 pixels in one meter of "monitor space".  At 1:1000, there are 4 pixels per meter (25 cm or ~1 foot raster resolution).

If each tile is 300x300 pixels, then each tile will represent a 75m x 75m area at 1:1000.

Lower left x=713333 y=90707
Upper right x=716225 y=94906

The width and height of the target area is 2892m by 4200m assuming the coordinates are in meters.

2892/75 x 4200/75 = 2159 tiles.

Assuming it takes 5 seconds to render a tile, 2159*5 / 3600 = 3 hours.

Something seems odd here.  500 hours is two orders of magnitude longer than what I would expect.
 
Regards,
Trevor

-----Original Message-----
From: mapguide-users-bounces at lists.osgeo.org [mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of Francesco Sozzi
Sent: January 4, 2011 4:46 AM
To: 'MapGuide Users Mail List'
Subject: R: [mapguide-users] Performance on prerendering tiles by use of MgCooker

I am trying on a server (on an Oracle VM Virtual Box) with the following
parameters:
Windows Server 2003
Intel Xeon X3440 2.53GHz
RAM 2.98 GB

The features are on Ticino, Switzerland

Best regards

Francesco

-----Messaggio originale-----
Da: mapguide-users-bounces at lists.osgeo.org
[mailto:mapguide-users-bounces at lists.osgeo.org] Per conto di Zac Spitzer
Inviato: martedì, 4. gennaio 2011 12:25
A: MapGuide Users Mail List
Oggetto: Re: [mapguide-users] Performance on prerendering tiles by use of
MgCooker

in terms of state, country?

how big is your server as well?

On Tue, Jan 4, 2011 at 10:11 PM, Francesco Sozzi <fsozzi at intercad.ch> wrote:
> Lower left x=713333 y=90707
> Upper right x=716225 y=94906
>
> -----Messaggio originale-----
> Da: mapguide-users-bounces at lists.osgeo.org
> [mailto:mapguide-users-bounces at lists.osgeo.org] Per conto di Zac Spitzer
> Inviato: martedì, 4. gennaio 2011 12:01
> A: MapGuide Users Mail List
> Oggetto: Re: [mapguide-users] Performance on prerendering tiles by use of
> MgCooker
>
> how big an area are you mapping?
>
> On Tue, Jan 4, 2011 at 9:28 PM, Francesco Sozzi <fsozzi at intercad.ch>
wrote:
>> Hi List,
>>
>>
>>
>> I have problems on generating  tiles on a project based on many shp
files.
>>
>> Themes are very simple and are not conditioned by scales.
>>
>> The project should be zoomed from about 1:200 to 1:40000.
>>
>> For tiles, I've configured four display scales (1000, 1200, 2900, 25000).
>>
>> When I try to build tiles by use of MgCooker, it estimates 500 hours!
>>
>>
>>
>> 20 days to prepare a prerender is really too much, is it normal to take
so
>> long?...
>>
>> Do I try to build too much tiles scales for my zoomin range?...
>>
>> Are there any documentation on the meaning of parameters of MgCooker (I
>> leave all defaults)?...
>>
>>
>>
>>
>>
>> Best regards
>>
>>
>>
>> Francesco
>>
>> _______________________________________________
>> mapguide-users mailing list
>> mapguide-users at lists.osgeo.org
>> http://lists.osgeo.org/mailman/listinfo/mapguide-users
>>
>>
>
>
>
> --
> Zac Spitzer
> Solution Architect / Director
> Ennoble Consultancy Australia
> http://www.ennoble.com.au
> http://zacster.blogspot.com
> +61 405 847 168
> _______________________________________________
> mapguide-users mailing list
> mapguide-users at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/mapguide-users
>
> _______________________________________________
> mapguide-users mailing list
> mapguide-users at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/mapguide-users
>



-- 
Zac Spitzer
Solution Architect / Director
Ennoble Consultancy Australia
http://www.ennoble.com.au
http://zacster.blogspot.com
+61 405 847 168
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