世界土壤数据库(Harmonized World Soil Database version 1.2 )(HWSD V1.2).其中，中国地区数据源为全国第二次土地调查由南京土壤所所提供的1:1,000,000土壤数据。数据格式:grid栅格格式，投影为WGS84。采用的土壤分类系统主要为FAO-90。
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001104s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.100006s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001738s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002001s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001165s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003450s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000986s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.005159s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.020738s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.017388s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 338176 [ RunTime:0.011305s ]
