GML (Geography Markup Language) is an XML-based format used for describing geospatial features and their attributes. It is commonly used in GIS (Geographic Information Systems) and other geospatial applications to encode and exchange geographic data. GML allows for the creation and sharing of complex geospatial data sets, including both vector and raster data.... including points, lines, polygons, and surfaces, along with...information about points, lines, polygons, and other spatial features...