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| GeoCommunity Mailing List |
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| Subject: | Re: [gislist] Photogrammetric corrections tools |
| Date: |
05/19/2004 02:40:01 PM |
| From: |
Brian Russo |
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That's called orthorectification: DMS Softcopy, RSI ENVI, LPS,
Geomatica, ER Mapper, et al can do this. I don't think there's anything
under ~$1500 that can do this and I don't know that I'd trust a cheap
package to do this. Not that price is a great metric, but still you get
what you pay for as they say. Certainly if you find something cheap
you'd want to test it out using a known set of gcps versus some other
software.
- bri
At Wed, May 19, 2004 at 12:07:20PM -0400, JuleC125@aol.com wrote:
> Dear Fellow Listers
>
> I recently purchased a popular Windows OS based raster GIS as a core of tools
> to set up a small GIS services capability. I am finding that the questions
> people want me to address require older aerial photography as one of the prime
> input data sources. I can obtain aerial photos as digital files from the USGS
> APFO and other sources. I can use common software, ie. PhotoShop, to load
> and manipulate the image files for easy viewing and interpretation, even in
> stereo, on-screen. I have enough computer power to easily load and manipulate
> the more than three GB of data that comprises a color stereo triplet of 9x9 inch
> format aerial photographs. The computer screen provides image magnification
> and quality that surpasses that of the highest quality hardcopy stereo photo
> interpretation stations I have ever used. Data interpretation from the
> photographs is thus fairly easy. Data capture and integration into the GIS is still
> problematic for me.
>
> I have used high quality (and high cost) software such as Leica Geosystems
> Orthobase Pro and Stereo Analyst. I do not need or want all the capability (or
> cost) these systems provide. I need something that provides capability to
> register a photograph to a map base, correcting for tip and tilt, for local
> topographic relief displacement, and, possibly, for camera lens characteristics. I
> want something better than "rubber sheet" correction, something that can
> utilize DEM data and/or GPS data for local topographic relief displacement
> correction. As an end product, I want to be able to overlay a historic photo data
> file onto a DOQ and have the (large scale) photo images locally register to
> those of the smaller scale geospatially accurate DOQ (and topographic map) images.
> I need then to be able to save the "corrected" photo image file in a format
> that can be imported into my GIS for further use.
>
> Does anyone know of inexpensive software that can do this?
>
> Thanks for any suggestions you might be able to provide.
>
> Jule A. Caylor
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--
Recursivity. Call back if it happens again.
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