R code for dissolved overlapping polygons and retained larger areas for polygons
时间: 2024-04-29 16:21:28 浏览: 14
Here's an example using the `sf` package in R:
```R
library(sf)
# Create example polygons
poly1 <- st_polygon(list(rbind(c(0,0), c(0,1), c(1,1), c(1,0), c(0,0))))
poly2 <- st_polygon(list(rbind(c(0.5,0.5), c(0.5,1.5), c(1.5,1.5), c(1.5,0.5), c(0.5,0.5))))
polys <- st_as_sf(data.frame(id = c(1,2), geometry = st_sfc(poly1, poly2)))
# Dissolve overlapping polygons and retain larger areas
polys_dissolved <- st_union(polys)
polys_largest <- polys_dissolved[which.max(st_area(polys_dissolved)), ]
```
In this example, we first create two polygons (`poly1` and `poly2`) that overlap. We then combine them into a single `sf` object (`polys`) and use the `st_union()` function to dissolve the overlapping polygons. Finally, we use `which.max()` to find the largest area polygon in the resulting object (`polys_dissolved`) and assign it to `polys_largest`.