10.11.2017 Views

Scythian Culture - Preservation of The Frozen Tombs of The Altai Mountains (UNESCO)

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

PRESERVATION OF THE FROZEN TOMBS OF THE ALTAI MOUNTAINS<br />

Fig. 2 Map <strong>of</strong> the<br />

middle part <strong>of</strong> the<br />

Yustyd Valley, showing<br />

archaeological sites<br />

and 10m contour<br />

lines, based on the<br />

Corona satellite<br />

images.<br />

© University <strong>of</strong> Ghent.<br />

the high costs <strong>of</strong> topographic measurements and<br />

the absence <strong>of</strong> complete coverage by aerial photographs,<br />

this part <strong>of</strong> the work was executed with<br />

the help <strong>of</strong> satellite images, such as those taken by<br />

the CORONA satellite. This satellite took detailed<br />

images <strong>of</strong> various areas including the <strong>Altai</strong><br />

<strong>Mountains</strong> during the 1960s and 1970s. Over<br />

800,000 high-resolution black-and-white negatives<br />

<strong>of</strong> the Earth’s surface were taken, and part <strong>of</strong><br />

this formerly secret archive is now available to<br />

researchers. <strong>The</strong> images are well suited for<br />

archaeological research due to their very high<br />

resolution and low price, as well as to the fact that<br />

they document landscapes as they were 40 years<br />

ago, these having in many cases now been drastically<br />

changed or destroyed by urbanization,<br />

industry or large-scale agriculture.<br />

However, the greatest advantage <strong>of</strong> the<br />

CORONA images is the fact that the satellite originally<br />

took two stereoscopic images. By combining<br />

these in the right way, a 3D view <strong>of</strong> the landscape<br />

can be obtained (Fig. 1). By inserting the<br />

geographical coordinates <strong>of</strong> certain points<br />

(Ground Control Points, or GCPs) into the digitized<br />

images using the correct s<strong>of</strong>tware it is even<br />

possible to generate precise orthophotos, height<br />

models, contour lines and detailed topographic<br />

maps from them (Fig. 2). Part <strong>of</strong> the University<br />

<strong>of</strong> Ghent’s fieldwork, therefore, was devoted<br />

to gathering useable GCPs. Using a Global<br />

Positioning System (GPS) receiver, geographers<br />

Dr. Rudi Goossens and Dr. Alain De Wulf from<br />

the Geography Department <strong>of</strong> the University <strong>of</strong><br />

Ghent located visible points in the CORONA<br />

images, such as crossroads, old farm houses and<br />

sharp outcrops, etc. With the maps made as a<br />

result <strong>of</strong> this used as background for the archaeological<br />

inventory survey, a campaign was<br />

launched to document the archaeological<br />

heritage and to pinpoint the locations <strong>of</strong> the<br />

<strong>Scythian</strong> tombs.<br />

Archaeological sites and structures were first<br />

located using GPS receivers accurate to a few<br />

decimetres. <strong>The</strong>se structures were described on a<br />

standard information card, measured and photographed.<br />

A tentative date for each structure<br />

was assigned, based on the structure’s morphology,<br />

the relevant literature and comparisons with<br />

other sites. A description <strong>of</strong> the geographical context,<br />

and especially <strong>of</strong> indications <strong>of</strong> permafrost<br />

56

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!