Shapefile dBase 数据 (naturalearthdata.com)
我正在研究在一个软件项目中使用自然地球,因此我下载了一个示例数据文件并查看了它的 dBase 文件,即 ne_50m_admin_0_countries.dbf
以下是该文件中的一个示例行:
ScaleRank = 1
LabelRank = 1
FeatureCla = Admin-0 countries
SOVEREIGNT = South Africa
SOV_A3 = ZAF
ADM0_DIF = 0.00
LEVEL = 2.00
TYPE = Sovereign country
ADMIN = South Africa
ADM0_A3 = ZAF
GEOU_DIF = 0.00
GEOUNIT = South Africa
GU_A3 = ZAF
SU_DIF = 0.00
SUBUNIT = South Africa
SU_A3 = ZAF
NAME = South Africa
ABBREV = S.Af.
POSTAL = ZA
NAME_FORMA = Republic of South Africa
TERR_ =
NAME_SORT = South Africa
MAP_COLOR = 2.00
POP_EST = 49052489.00
GDP_MD_EST = 491000.00
FIPS_10_ = 0.00
ISO_A2 = ZA
ISO_A3 = ZAF
ISO_N3 = 710.00
现在,到底是什么这个东西?我可以猜出“SOVEREIGNT”和“NAME”等字段是什么,但“ISO_A3”、“MAP_COLOR”或“ScaleRank”到底是什么?
我尝试在naturalearthdata.com 和其他地方的各个地方查找文档,但我似乎找不到任何文档。我究竟应该如何理解所有这些领域?
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ISO 内容 A2、A3、N3 都与 ISO-3166 全球国家/地区代码等相关。看看
http://www.unc.edu/~rowlett/units/codes/country.htm
但不确定 map_color 或比例等级。
ISO stuff A2, A3, N3 are all associated with ISO-3166 global country codes and such.. Take a look at
http://www.unc.edu/~rowlett/units/codes/country.htm
Not sure of map_color or scale rank though.
形状文件附带的 dbf 文件存储每个要素(多边形、线、点等)的属性。这完全取决于创建形状文件的人。所以如果你猜不出它是什么,你就必须问创造它的人。
我访问了该网站,我想您得到了这些数据 管理员 0 – 国家/地区。如果那里写的还不够,你就得问那里的人,因为数据不会描述他们。有时形状文件附带有 xml 文件,该文件记录了数据是什么,但对于这个特定数据,我只看到 shp(定义多边形)dbf(每个多边形的属性)prj(正在使用的地图投影)和 shx(我不知道它是什么)是...索引吗?)。
the dbf file that came with shape file stores attribute of each of feature (a polygon, a line, a point etc). And it is totally upto person who created the shape file. So if you cannot guess what it is, you have to ask guys who created it.
I went to the website, and i guess you got this data Admin 0 – Countries. If what's written down there is not enough, you have to ask those guys there, as the data wont describe them. Sometimes shape file is accompanied with xml file which document what the data is, but for this particular data i saw only shp (defines polygons) dbf (attributes of each polygon) prj (map projection being used) and shx (i dont know what it is... indexing?).