The evolution of Geography Markup Language (GML) compression model

This paper will discuss about the evolution of Geography Markup Language (compression model.GML is a type of XML files normally used to store spatial data from database.However due to the huge size processing and transferring this type of file will cost performance and storage issue. Throughout the years several GML file compression model has been developed to help in addressing this problem.Four GML file compression model which are GPress, Delta Sp Compression and Extrapolation Model, GMill, and GPress++ has been selected to be discussed in this paper.In addition a comparison and the enhancement done in each model will be discussed in here.From the assessment GPress++ compression model h significant file compression rate on synthetic dataset with 77.10% improvement on gzip compressor