The problem of data heterogeneity is the major issue for consideration in geospatial domain. Numerous organizations have huge geo data but in heterogeneous data formats, which makes it difficult to utilize these data for an application on a common platform. To overcome such problems and to make data interoperable, many countries have developed their standard data formats. Government of India also has taken initiatives with the establishment of National Spatial Data Infrastructure (NSDI) and has recommended NSDE (National Spatial Data Exchange) data format to be used by “all the Indian GIS data providers”. With these specified standards, the problem of heterogeneity among data of different organizations could be solved, but easier and faster access of data is another requirement. This can only be achieved by transferring maps through Internet and hence this data should be encrypted into a language that can be understood by web browsers, like XML (Extensible Markup Language). The Open GIS Consortium (OGC) recommended Geography Markup Languag
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