[Cartoweb-users] AW: Cartoweb Ajax and performance, Cartoweb-users Digest, Vol 32, Issue 22

Lauber Christoph ch.lauber at geo-thun.ch
Fri Dec 28 14:33:19 EST 2007

Hello Giu

I use orthophotos as well in my projects. I allways use the gdal_translate and gdaladdo functions to prepare the images. So i get zoomfactor independent a good picture in a reasonable response time. Usually i have several pictures for one orthophoto layer. So i put them with the gdaltindex function together.

I hope my answer helps you.


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Betreff: Cartoweb-users Digest, Vol 32, Issue 22

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Today's Topics:

   1. Cartoweb Ajax and performance (giuseppe.derossi at email.it)


Message: 1
Date: Fri, 28 Dec 2007 14:48:57 +0100
From: giuseppe.derossi at email.it
Subject: [Cartoweb-users] Cartoweb Ajax and performance
To: cartoweb-users at lists.maptools.org
Message-ID: <82f39bea12f14963ea0ca9109e14d142 at>
Content-Type: text/plain; charset="iso-8859-1"

the performances of a project of mine have been dramatically decreased after
applying new ajax feature about displaying an orthophoto (.Tiff about 150
Megabyte): in previous version the response timing was about 7 second
(already a lot of time) but becouse the image was loaded into different
bursts the delay was not too heavy, now the same image takes 25 seconds,
during this time the page is steady and this is annoying. 
Is there a way in order to load a very heavy layer such as an orthophoto in
few time?  is there the possibility to set that layer so it goes beyond ajax
function ? Can I change the format ?
any idea is well accepted .

Thanks and best regards.

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