Research on the application of ultra-small scale color IR Aerial Photography in investigation of renewable natural resources and environment
Analysis of Interpretation Capability
The ultra-small color IR aerial photos that possess the above mentioned high resolution has a capability to distinguish the following objects:
Mature forests, forest stands, shrub forests, patch of broadleaf-grass, patch of the grass family, aquatic vegetations scattered forest swamp, vegetation on flooded plains, rock outcrops, sand dunes and winderosion lands, large stracts of naked earth, dry earth, moist earth, broooks, hydrologic types, small stream of grade two and three, landscape structure, landscape tones, landscape limits, landscape morphology, drainage condition, area of sources of water, severe soil erosion, forest fire slash, fallen wood , litter layer, cutover area, forest boundary, firing of forest and farmalnad, finge of forest and wasteland, farmland vagetation of landuse, desease and insect influence, desease damage, hudrologic conditions, natural open terrain, tree ages, treecanopy coverage, site conditions, forest stock volume, maturation degree of grasses, types and classes of gmsses, narrow paths, houses etc.
Cost assement of ultra-small scale color IR aerial photography and prediction of its applicaton prospect
Compared with normal middle scale color IR aerial photography, the cost of the ultra-small one could be reduce by 90%, and is only 0.25%.
Its spatial resolution is 15 times higher than that of TM images, and its cost is only 2-4 times of the latter (in the same scale and same area) . Compared with SPOT image, the spatial resolution is 5 times higher, and the cost is only 56-100% of the latter.
Therefore, the property-cost ratio of the ultra-small scale color IR aerial photography is very high. Its application is attractive both technically and cost effectively. Its application prospect is estimated to be very good.
The application research of ultra-small scale color IR aerial photography conforms to the nee tendency of developemtnt of internatioal earial remote sensing. Its economic and technical sig. Nificance is also very great. The development it has obtained presages that the technology of aerial remote sensing and aerial survey would undergo important changes.
The production application research of the ultra-small scale and high altitude color IR aerial photography has revealed the prelude of application of such photography in China to the aerial remote sensing investigation of renewable natural resources and environment, and showed a broad application prospet. Such developments have provided a theoretical basis fore the further development of comprethensive remote sensing investigation techniques of resources and environment, and would have broad application value.
