GPS technology in the Soil and Water Conservation
| nd water conservation engineering construction plans, soil erosion maps and other precision engineering. Mapping the control point through an encrypted, real-time dynamic GPS positioning application technology (RTK) and GPS mapping out the three-dimensional measuring tool can scale topographic maps of various soil and water conservation and soil and water conservation projects for the construction of loft.
3.2.2 In terms of soil and water conservation altimetry GPS altimeter, including: GPS measurement of high-ellipsoid; geoid model; normal height datum transfer mode to the other three aspects. First, find the height anomaly (H), GPS is the ellipsoid measured high (h), stripping out the elevation anomaly (N); the second is the determination of the distance, although the elevation datum geoid and the impact but still find the valid values between points; third is the global gravity field model (GGM) geoid model obtained, the relative accuracy can be controlled within a fraction m units. 4, GPS technology application in the Characteristics of Soil and Water Conservation 21 3S (RS, GPS, GIS) technology, that is, remote sensing, global positioning systems and geographic information systems in the Soil and Water Conservation has become the most attractive high-tech fields, after nearly 10 years of use shows that the various departments, GPS to all-weather, high precision, automation, high efficiency and other notable features, to win the trust of users, and successfully applied geodesy, engineering surveying, photogrammetry, resource exploration, and other disciplines, thereby mapping the field with soil and water conservation to a new technological revolution. 4.1 high positioning accuracy, observed speed. Currently using carrier phase relative positioning accuracy up to 1ppm, while the use of stand-alone positioning accuracy of better than 10 meters |
Last data update: 10.12.2011