Three-dimensional Spatial Analysis Techniques In Digital Waterway

In recent years, with the development of navigable channel construction, it put forward a higher request to the level of channel management. The visualization in scientific computing is widely adopted in science and engineering calculation field for its advantage of explaining a lot of data effectively and iconically. In the channel digital domain, using terrain 3d visualization technology can reproduce the beds of 3d information quickly and provide effective means of channel analysis like the river channel evolution. This paper is based on the visualization technology and does the 3d modeling for Sunan canal channel. It analysis and researched the data on channel with the method of 3d spatial analysis.This paper is based on the analysis of the original measured data of Sunan canal channel. It researched the method of changing the grid form and vector form of the original section measured data into the digital elevation DEM data, and it completed the 3d modeling of the Sunan canal channel; It used the DEM data to generate channel surface model, channel isopleth diagram showing and channel any the sectional drawing. And it put forward the method of generating channel section by using the DEM data. Thus it can show multiple channel bed forms; This paper did the section comparative analysis based on the channel section data and provided the technical means for the analysis of the evolution process of river. At the same time, it put forward the method of blunt in quantity calculation that based on the body element. Compared to the method of engineering calculation before, the result of calculation is more accurate. Combined with real-time water level, velocity, wind speed data of digital waterway in the application system, it designed a kind of the method of analysising the channel section's ability of having some ship passing. And it provided the decision of the ability of ship navigation tool for the shipping administration management departments.