U of S | Mailing List Archive | alt-photo-process-l | Re: Remote Sensing

Re: Remote Sensing

Your use of multispectral imaging is a good idea for archeology. First, I suggest you read a book or two on remote sensing. See, for example, Remote Sensing: Principles and Interpretations by Floyd F. Sabins. He was involved in design of the first multispectral imaging system on Landsat while working for Chevron Research and I had a class from him as an undergrad (I'm a hydrogeologist).

You can't use photographic techniques for thermal IR. Thermal imaging requires a special theromographic camera (Google "thermal IR imaging"). The thermal cameras are sensitive to longer wavelengths than photographic sensors or IR film.

You can use photographic IR with black & white or color IR film plus filters, or a converted digital camera (check out the Fuji IS-1). You can purchase IR filters from Hoya, B+W, and other manufacturers. Photo IR has typically been used to look for stressed vegetation, which may be used as an archeological indicator.

Regarding the blue, green, and red filters on Landsat--the multispectral scanner was a black & white camera; the filters were used for making composite color images.

One other thought, you might want to try purchasing images or digital files from the USGS or other vendors of satellite images to take a first-cut look at the area you are interested in. Resolution today is much improved over what was available 30 years ago, so you may get some useful information from readily available sources.

Glen Wyatt

From: Yves Gauvreau <gauvreau-yves@cgocable.ca>
Reply-To: alt-photo-process-l@usask.ca
To: alt-photo-process-l@usask.ca
Subject: Re: Remote Sensing
Date: Mon, 11 Aug 2008 07:46:30 -0400


I just saw Nova science now yesterday and it sowed how they used satellite images to discover new Mayen archeological site. The accuracy was nearly perfect from what I could see.

But before you jump to any conclusions, you need to know that all Mayen site where build in limestone and it would seem that the dissolution of limestone affect surrounding vegetation in a detectable manner. This is most likely not the exact same case with different construction materials and different surrounding. I assume you would need to study similar known constructions and their effect on similar surrounding to those you are looking for before anything else.

----- Original Message -----
From: Mustafa Umut Sarac
To: alt-photo-process-l@usask.ca
Sent: Monday, August 11, 2008 3:28 AM
Subject: Remote Sensing

Hi List ,

I am an archeologist and want to take multispectral pictures of plains with the hope of finding underground remainings of Hittite Kings Tombs.
And I want to give a gift to my vineyard owner friend for to follow vegetation health of his plants.
Another idea is to hoping to see the inside heat of the Achilles Tumulus near Troy in Turkey.
Etc Etc
I want to do this with taking many same area picture with different narrow band filters.and merge together with false colors
I got a list from the Landsat Satellite sensor and I learned that I need green , yellow and red filters .
And I need many diffrent IR filters.
Astrophotographers uses many different filters but they are specialised on deep sky or removing light pollution.
Who produces filters special for remote sensing ?
And I need to take different band IR photography . I need many IR filters .
Who produces them ?

Best ,

Mustafa Umut Sarac