AW: RE: [mapguide-users] MG Error Out of memory, bad allocation

Tue Jul 21 11:23:35 EDT 2009

<Can you confirm if your TIFF files are tiled tiff? If they aren't then the system will be slow as it converts them on 
the fly.
I will try to convert the files to tiled TIFF with MG Rasterworkshop (MG 6.5)

<How many tiles should be shown at the 1:2000 scale? I'm guessing this should only be a small subset and hence it 
should be quick.

max. 4 files

<I think Stefan's suggestion is a good one, in particular for the ecw.

<What tool are you using to convert the files? Are people using FW Tools or something else?

created with ImageMagick, converted to jpg with Photoshop, to ecw with ER-Mapper 

<Dave

Jürgen

-----Original Message-----

From: mapguide-users-bounces at lists.osgeo.org [mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of Stefan 
Dalakov

Sent: Tuesday, July 21, 2009 6:30 AM

To: juergen.konradt at bluewin.ch; MapGuide Users Mail List

Subject: Re: [mapguide-users] MG Error Out of memory, bad allocation

Hi Jürgen

One of the options may be to merge together files.

I have an image, 32000x16000 tiled RGB tiff, 1.7GB in size which is 

served like a lightning by an old computer, not even designed to be a 

server, with 1.5 GB of RAM.

Software configuration - same as yours.

By merging rasters you can reduce the number of files almost 60 times, 

which means that you will have 15-20 files, roughly.

Of course, you know better, if your project allows this, but in general, 

MGOS seems to handle easier a small number of big files, rather than a 

big number of small files.

Best regards : Stefan Dalakov

juergen.konradt at bluewin.ch wrote:

> Hi,

>

> I have a problem with a rasterlayer (not tiled).

> It is a layer using about 1000 TIFF-Files (RGB, 3000x3000 pixel, scale 1:1000).

> The visibility of the layer is 1:100 to 1:5000.

> If I load the map (sacle 1:2000) I get the error: Out of memory. bad allocation.

> If I reduce the number of tiff-files in the folder (500) I get no error but the map is loading very, very slow.

> If I change the format from tiff to jpg or ecw (all 1000 files) I get no error but the map is also very slow.

> I get the same error with Autodesk Raster FDO and OSGEO Gdal 

>

> MGOS 2.02 or MGOS 2.1.0 Beta

> W2003 Server SP2

> IIS 6.0

> AjaxViewer (JSP)

>

> is there any solution for this problem?

>

> Jürgen

>

>

>

>

> _______________________________________________

> mapguide-users mailing list

> mapguide-users at lists.osgeo.org

> http://lists.osgeo.org/mailman/listinfo/mapguide-users
>

>
>   

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