Thanks to everybody who responded. I'm using the TIF images (Aerial photos)as charts in a navigation program. I've already incorporated one TIF as a usable chart. I'd like to join six of them to make a chart of a larger area. I don't know if it's best done by stitching or TIF combiner software. I've never used either one.

-----Original Message-----
>From: Don Penlington <[log in to unmask]>
>Sent: Apr 11, 2008 12:44 PM
>To: [log in to unmask]
>Subject: Re: [PCSOFT] Mosaic GIF images
>
>Rob wrote:
>>(Autostitch which Peter mentions does a great job...It's not infallible, =
>>but one of the best I've found)
>>
>>What's its fallibility.
>
>
>Along with other similar software, it can't always find sufficient points 
>of reference to enable it to join photos.
>
>That usually occurs if there's insufficient overlap, or insufficient 
>distinguishing points.
>
>But it can sometimes occur even where such points appear obvious to us.
>
>When I looked into this topic a year or so ago, Autostitch appeared to be 
>the only software that would stitch in both horizontal and vertical planes 
>at the same time over multiple photos. I imagine there are probably several 
>commercial derivatives of Autostitch by now.
>
>Don Penlington
>
>
>
>
>
>
> From the Beach at Surfers Paradise in sunny Queensland.
>Computer tutorials, local scenery,  and other things at my website:
>http://users.tpg.com.au/deepend/index1.html
>
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