Running examples in ‘geosed-Ex.R’ failed
The error most likely occurred in:

> base::assign(".ptime", proc.time(), pos = "CheckExEnv")
> ### Name: geo_midpoint
> ### Title: Point of Equidistance to Up to Three Longitude, Latitude Points
> ### Aliases: geo_midpoint
> ### Keywords: circle disk enclosing geo latitude longitude sed smallest
> 
> ### ** Examples
> 
> 
> # Load required packages
> require(mapview)
Loading required package: mapview
Warning in library(package, lib.loc = lib.loc, character.only = TRUE, logical.return = TRUE,  :
  there is no package called ‘mapview’
> require(sp)
Loading required package: sp
The legacy packages maptools, rgdal, and rgeos, underpinning the sp package,
which was just loaded, will retire in October 2023.
Please refer to R-spatial evolution reports for details, especially
https://r-spatial.org/r/2023/05/15/evolution4.html.
It may be desirable to make the sf package available;
package maintainers should consider adding sf to Suggests:.
The sp package is now running under evolution status 2
     (status 2 uses the sf package in place of rgdal)
> 
> # Create sample geo dataset
> sample_coord <-
+    matrix(
+         c(
+             sample(327131680:419648450, 3) / 10000000,
+             sample(-1147301410:-1241938690, 3) / 10000000
+         ),
+         ncol = 2
+     )
> 
> # Generate circumcenter and radius
> gmp <- geo_midpoint(sample_coord)
> 
> # Find distance to circumcenter
> radius <- geo_point_dist(rbind(sample_coord[1, ], gmp))
> 
> # Create 80 sided polygon based on gmp's center and radius
> gmp_poly <- geo_surround_poly(gmp, radius, 80)
> 
> # Join all the points into a single matrix
> bound_poly <- rbind(sample_coord, as.vector(gmp), gmp_poly)
> 
> # Create SpacialPoints object and pass to mapview for visualization
> mapview(
+     SpatialPoints(
+         bound_poly[,c(2, 1)],
+         proj4string = CRS("+proj=longlat +datum=WGS84")
+     )
+ )
Error in mapview(SpatialPoints(bound_poly[, c(2, 1)], proj4string = CRS("+proj=longlat +datum=WGS84"))) : 
  could not find function "mapview"
Execution halted