如何根据数据框中的列将列名称添加到空间多边形?

How to add columns names to a spatialpolygon based on column from a dataframe?

虚拟空间多边形:

x_coord <- c(16.48438,  17.49512,  24.74609, 22.59277, 16.48438)
y_coord <- c(59.736328125, 55.1220703125, 55.0341796875, 61.142578125, 59.736328125)
xym <- cbind(x_coord, y_coord)

library(sp)
p = Polygon(xym)
ps = Polygons(list(p),1)
sps = SpatialPolygons(list(ps))
plot(sps)

虚拟数据帧:

df <- data.frame (date= c("2021", "2015", "2018"),
                  value= c(100, 147, 25))

基本问题,但如何将数据框的列名称添加到空间多边形? (我不需要添加一些值,我只希望我的空间多边形具有字段“日期”和“值”)

您可以使用 addAttrToGeom

扩展您的对象(在本例中为空间多边形)
library(sp)
spsCRS <- CRS(SRS_string = "EPSG:4326")
p = Polygon(xym)
ps = Polygons(list(p),1)
sps = SpatialPolygons(list(ps))
proj4string(sps) <- spsCRS
plot(sps)

df <- data.frame("ID" = 1, "Name" = "MyNewPolygon", "URL" = "http://example.org")
spsDf <- addAttrToGeom(sps, df, match.ID = "ID")

创建一个新对象:

An object of class "SpatialPolygonsDataFrame"
Slot "data":
  ID         Name                URL
1  1 MyNewPolygon http://example.org

Slot "polygons":
[[1]]
[...]