老虎普查数据中的Shape_area和ALAND AWATER [英] Shape_area and ALAND AWATER in Tiger census data
本文介绍了老虎普查数据中的Shape_area和ALAND AWATER的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
Shape_area是什么意思?我注意到这不是Aland和Awater的总和.这三个单位分别是什么?
What does Shape_area mean? I noticed that it is not the sum of Aland and Awater. What are the units of these three?
推荐答案
ALAND和AWATER的单位为平方米.例如，tl_2015_us_county.dbf在Cuming County记录了ALAND = 1477895811和AWATER = 10447360.来自
The units of ALAND and AWATER are square meters. E.g., tl_2015_us_county.dbf has a record for Cuming County with ALAND = 1477895811 and AWATER = 10447360. From Wikipedia the area is 575 mi^2. If you convert 575 mi^2 to sq. meters you get same result as ALAND + AWATER
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