Warning: file_put_contents(): Only 0 of 6469 bytes written, possibly out of free disk space in /home/www/wwwroot/zidian/201990.com/index.php on line 55 thematic classification map是什么意思，thematic classification map的翻译，thematic classification map音标、读音、用法和例句_耀久九英英词典
Based on the previous research of classification, stratified two-stage sampling is introduced into the accuracy assessment of thematic map. 在以上分类研究的基础上，引入分层二阶随机抽样方法改善专题图的精度评价效果。