[Geotiff] Easier way to Georeference TIF's?

[Ted Florence]

Have a look at Geographic Imager www.avenza.com
With Geographic Imager you can do all this right in Adobe Photoshop.

Gary Stephenson wrote:

> If you have AutoCAD available, Raster Design runs on top of AutoCAD or 
> AutoCAD Map and can georeference your charts and export to GeoTiff 
> readily.
>
>  
>
> Gary
>
>  
>
> ------------------------------------------------------------------------
>
> From: geotiff-bounces at lists.maptools.org 
> [mailto:geotiff-bounces at lists.maptools.org] On Behalf Of Dennis Megarry
> Sent: Tuesday, April 18, 2006 10:41 AM
> To: geotiff at lists.maptools.org
> Subject: [Geotiff] Easier way to Georeference TIF's?
>
>  
>
> I've spent a great deal of money trying to find the best solution for 
> georeferencing my scanned charts without much luck.  I'm hoping 
> someone on this list may have a better solution..
>
>  
>
> I scan 47 charts every 56 days, I have about 2 days to get these 
> georeferenced out out the door.  Each chart has lat/lon lines and I 
> have all the projection info for them. 
>
>  
>
> What I have done so far:
>
>  
>
> Global Mapper:
>
>  
>
> This is a very good package, but takes about 1/2 an hour to rectify a 
> scan chart, doesn't have any options for what math it uses when 
> generating the Georeferenced chart, so the edges fall off sharply if 
> you can not get the edges rectified close enough.  Also, takes FOREVER 
> to generate a GeoTIFF!  anywhere from an hour to 1.5 hours.  I though 
> it was may machine, so I built a box with the latest and greatest AMD 
> CPU I could find ($1200 ouch!), put 2GB's of fast RAM in there and a 
> 300GB 7500RPM drive with a dual monitor graphics card.   Still takes 
> an hour or more.. ARGH!
>
>  
>
> ESRI ArcGIS 9.1
>
>  
>
> Tried rectifying a chart in ArcMAP, was VERY fast and easy.  Lets me 
> choose what methode it uses to calculate the reference points.  Only 
> problem is, you can't export a GeoTIFF in any resolution other than 
> screen resolution..  And I then have to go back and add the coordinate 
> system to each chart.  Tried writing VB code using ArcObjects to 
> export, but still having problems exporting (mainly the extends).
>
>  
>
> I found a photshop plugin from another company that lets you 
> georeference charts in PhotoShop CS, but ARGH!  Way to difficult, and 
> lacks the ability to bring in another chart as a reference.
>
>  
>
> Anyone know of something better that I can use to speed up this 
> process?  I haven't tried Manifold yet (no eval version).    Or better 
> yet, does anyone offer plugin's for ArcMAP that will solve me problems?
>
>  
>
> Thanks!
>
>  
>
> Dennis
>
>------------------------------------------------------------------------
>
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>

-- 
Ted Florence
ted at avenza.com

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