Data Sharing and Interoperability Technology Data sharing is a core issue in digital cities. Data conversion is the simplest solution for data sharing. It can convert data from different systems into the internal data format of the system. In general, if you follow China's geospatial data exchange format standard, then you can perform effective data conversion, but this is a low-level method; the advanced method is direct real-time data sharing, which allows users to arbitrarily transfer to digital cities. Systematic data, interoperability between different systems, is a problem that is being studied internationally.
Compression technology and hyperlink technology Digital city night lighting planning also involves the management and application of a large number of lighting construction engineering graphics. Computer digital image data compression technology is also one of the key technologies to realize digital city. Only with advanced compression technology can the telecommunication network have a very large data file called from the remote spatial data exchange center for image display. The hyperlink technology used by the Internet has hyperlinked IP addresses to local websites, which has solved the problem of hypertext links. However, digital city night lighting planning needs to involve a large amount of data such as graphics and images, which requires interoperability technology. And compression technology to solve.
Color information communication technology Cathode ray tube (CRT) is widely used in the field of image technology. For example, cathode ray tubes are widely used in televisions and computer monitors, but there are dozens of standards for this type of display technology. The color standards of different devices of the manufacturer are not necessarily the same; and because the color gamuts of different display media are different, for example, the color gamut of color television (CTV) and color film (CFL) is wider than that of color printing (CPT), and different displays The white field balance chromaticity coordinates are inconsistent.
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