How to georeference an image?

[S.Nicolas - Webmaster]

Yes, sorry for the wrong title.
So yes, I need to georeference a illustrator world map to use with mapserver
after saving it as a tif file.

Stéphane 



-----Original Message-----
From: UMN MapServer Users List [mailto:MAPSERVER-USERS at LISTS.UMN.EDU] On
Behalf Of Bart van den Eijnden
Sent: 03 March 2005 10:08
To: MAPSERVER-USERS at LISTS.UMN.EDU
Subject: [UMN_MAPSERVER-USERS] How to georeference an image?

Okay,

so actually what you are looking for is a tool to georeference a raster
image. Many proprietary GIS systems can do this, but I don't know of any
Open Source GIS system to do this (could be my lack of knowledge in this
department for sure ...).

Maybe others do though, I have changed the thread subject accordingly, so
hopefully you will get some feedback.

Best regards,
Bart

> Yes,
>
> I would like to convert this illustrator worldmap into a a tif file to 
> use in mapserver as a ratsre image.
> I already tried this, but some of the point projected on the map are 
> not correctly placed. For example, I project a "dot" on a city and 
> there is slight difference of location.
> I think it comes from the extent of the map that is not correct.
>
> Stéphane
>
>
> -----Original Message-----
> From: bartvde at xs4all.nl [mailto:bartvde at xs4all.nl]
> Sent: 03 March 2005 09:46
> To: S.Nicolas - Webmaster
> Cc: mapserver-users at lists.umn.edu
> Subject: Re: [UMN_MAPSERVER-USERS] Map Extent
>
> Hi,
>
> I don't know if I understood your question correctly ....
>
> These type of files are not geo-referenced, so they don't come with 
> extent information.
>
> Since you are calling it a worldmap, is the extent not just the whole 
> world (-180,-90,180,90 in deegrees)? What do you want to do with it, 
> show it in Mapserver (after conversion)? If it does not show the whole 
> world, just take an atlas or worldmap on internet to find out the 
> coordinates,
> eg:
>
> http://www.wmsviewer.com/main.asp
>
> Best regards,
> Bart
>
>> Hi,
>>
>> Could somebody direct me to a simple example to calculate the correct 
>> map extent of an illustrator worldmap I have.
>>
>> Thanks in advance
>>
>> S. NICOLAS
>>
>
>