-------- Original Message --------
Subject: Re: Georeferencing software
Date: Wed, 1 Apr 2009 09:44:57 -0700
From: Matt Fox <[log in to unmask]>
To: [log in to unmask], [log in to unmask]
References: <[log in to unmask]>
If you don't mind spending a few dollars, I would highly recommend
GlobalMapper (www.globalmapper.com <http://www.globalmapper.com>). I
think it's about $290, but maybe you can work out a deal with them for
an ad banner or something. It is very good at handling large images and
has very powerful georeferencing capabilities that are simple to use.
You can either georeference by known points on the map (for example if
you know lat/lon of the corners) or you can georeference one map using
another map that is already georeferenced. It can also handle just
about any image format and just about any projection/datum. It's also
very simple to use and don't need to be a GIS expert to figure out.
GlobalMapper can also export to GoogleEarth SuperOverlays (KML), Google
Maps, and several other web formats if you're interested in putting them
online.
A good open-source option is a program called MapWindows
(http://www.mapwindow.org/).
I've also been working on georeferencing historic topo maps for CA. At
last count, I have about 1,200 historic topos for CA that I've
georeferenced (I got most of them from your library and CSU Chico).
There is also a graduate student at CSU Chico that has contacted me
about a project she is working on to georereference CA topo maps as part
of thesis or something. Maybe there is some way we can help each other
out??
Lastly, one of the things I've also been doing is digitally enhancing
the topo maps as I georeference them. Here are a couple examples.
Example 1
Before: http://www.gelib.com/temp/Before1.jpg
After: http://www.gelib.com/temp/After1.jpg
Example 2
Before: http://www.gelib.com/temp/Before2.jpg
After http://www.gelib.com/temp/After2.jpg
Not sure if that's something you're interested in doing. I know some of
the historic authenticity is lost by doing this, but the process can
remove many of the effects of aging (fading, tears, tape marks, etc).
If you interested in this, let me know and I can explain process. It's
fairly quick and simple to do.
Matt Fox
www.gelib.com <http://www.gelib.com>
[log in to unmask] <mailto:[log in to unmask]>
On Tue, Mar 31, 2009 at 9:40 AM, Maps-L Moderator for John Ridener
<[log in to unmask] <mailto:[log in to unmask]>> wrote:
-------- Original Message --------
Subject: Georeferencing software
Date: Tue, 31 Mar 2009 12:37:50 -0400
From: John Ridener <[log in to unmask]
<mailto:[log in to unmask]>>
To: [log in to unmask] <mailto:[log in to unmask]>
Hi Maps-L,
The UC Berkeley Earth Sciences and Map Library staff are working toward
georeferencing many of the maps that are scanned here at the library. As
we're still in the planning stages for this undertaking, I was
wondering if
anyone had any experiences, good or bad, with specific
georeferencing software?
Ideally, we're looking for a solution that could be easily inserted
into the
scanning workflow and used by specialists and non-specialists alike.
Maybe
something lightweight and open source?
Any information or experiences you'd like to share is greatly
appreciated.
Thanks,
--
John Ridener
Technical Processing/Web - GIS Specialist
Earth Sciences and Map Library
UC Berkeley
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