This paper uses land use data to analyze Guangzhou's temporal-spatial evolution in landscape pattern from 1995 to 2015, and employs geographic detector to discuss the influence of spatial factor on landscape pattern, aiming at providing revelation for allocating land resources. Guangzhou's construction land has largely increased, while other landscape areas have declined, with farmland, woods, waters, grass land, and unused land at a decreasing order. Transformation occurs frequently among farmland, woods, waters and construction land in landscape pattern, most concentrating in Huadu, Baiyun, Huangpu, Fanyu and southwestern Zengcheng. The changes are in reverse proportion to level, slope, distance to subway and major roads, and in an upside-down U shape to urban downtown. Woods, farmland and construction land changes are mainly subject to the distance to subway; grassland change is subject to level and slope; unused land change is subject to the distance to major roads. Landscape pattern changes happen more easily in two factors' interaction than one single factor.

Metallic ore resources are vital basis for industrial development and economy. Recently, as global new strategic industries develop, the industrial countries are in strong competition on metallic ore resources. This paper selects USA, a representative in industrialized country, to analyse its strategy, consumption regularity and structure over 9 decades in metallic ore resources, and finds out that since USA entered the post industrialized period non-ferrous metals like molybdenum, cobalt, tungsten and nickel showed a notable rising tendency, with strong and larger added consumption in rare and scarce metals, such as niobium, gallium, indium and zirconium concentrate, followed by tantalum, beryllium, germanium, hafnium, tellurium, selenium and rhenium. This paper presents suggestions for China's metallic ore resources development. 