At a routine briefing on Aug. 27 the Ministry of Natural Resources released
China’s first national geometric reference imagery dataset. The dataset,
produced jointly with provincial natural-resources departments, is a
national-level imagery baseline covering all land and designated as a public
geospatial product to support Digital China and the surveying and mapping
sector’s upgrade. Two market-relevant features: nationwide spatial resolution
reaches 0.5m using national and local high-resolution sources; and positioning
accuracy has been improved by more than double after technical breakthroughs in
accuracy control for mountains, plateaus, sparse-control zones and uninhabited
areas, addressing long-standing low orthorectified-image geometric precision in
western China.
