*2.4. Acquisition of the Forest Distribution Pattern in the Helan Mountains*

The Global PALSAR-2/PALSAR Forest/Non-Forest Map product utilizes synthetic aperture radar (SAR) images obtained from the phased array type L-band synthetic aperture radar (PALSAR) on the ALOS-2 satellite to generate a global map of forest and non-forest areas. The classification accuracy of this map, in terms of forest and non-forest information, can reach 90%. This product is widely used for monitoring forest changes, assessing forest carbon storage, and providing information for forest management decisions. We downloaded this product using the GEE and extracted the pixels defined as forest areas within the Helan Mountains region, ultimately obtaining the forest distribution pattern of the Helan Mountains.
