针对一些通用的空间数据的数据交换格式进行了研究,并就不同数据格式的数据量进行了对比实验。结果表明,在栅格数据中,.bmp格式的数据量最大,.jpg格式和.gif格式的数据量较小;矢量格式的数据量的大小与空间数据的属性有关,在几种常用的矢量格式中,.e00格式的数据量最大。
The spatial data quantity of different formats for a map are compared by experiments. Storaging map by raster format, its spatial data quantity is equal to the other of same size map if not be compressed. If only be compressed, the raster format data quantity has relation to chart speckle area size., bmp file spatial data quantity is the most large in several raster formats, . jpg file and. gif file data quantity are less. But storaging map data quantity by vector format has relation to spatial data attribute., e00 file spatial data amount is the most large in several vector formats.