ESRI官方白皮书，shapefile文件格式的完整解析，包含Shapefile Technical Descr iption、Organization of the Main File、Main File Record Contents、Organization of the Index File、Organization of the dBASE File
ESRI Shapefile Technical Descr iption Position Field Value Type Number Order Byte 0 Shape Type 31 Integer 1 Little Byte 4 Box Box Double 4 Little Byte 36 NumParts NumParts Integer 1 Little Byte 40 NumPoints NumPoints Integer 1 Little Byte 44 Parts P
