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Forests Sourcebook - HCV Resource Network

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Box 7.20<br />

Using Remote Sensing for Real-Time Monitoring<br />

Annual, and even quarterly, large-scale assessments are<br />

very possible using satellite data, if the imagery is being<br />

collected. However, there is no guarantee that the necessary<br />

imagery is being collected. The spatial resolution<br />

of MODIS is not high enough to be of real value—too<br />

much forest area needs to be cleared for it to be recognized<br />

by the free MODIS data. Landsat-like sensors, or<br />

better, are needed. Next-generation techniques and<br />

technologies are being developed.<br />

Weekly or monthly assessments require a very specialized<br />

satellite capability (Quickbird imagery) or aircraft.<br />

Both are viable options with different budgetary<br />

implications:<br />

■<br />

■<br />

Quickbird satellite data are for smaller areas of forest<br />

(

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