mapview (version 1.1.0)

mapView: View spatial objects interactively

Description

this function produces an interactive view of the specified spatial object(s) on top of the specified base maps.

Usage

"mapView"(x, map = NULL, maxpixels = mapviewGetOption("mapview.maxpixels"), col.regions = mapviewGetOption("raster.palette")(256), at = NULL, na.color = mapviewGetOption("na.color"), use.layer.names = FALSE, values = NULL, map.types = mapviewGetOption("basemaps"), alpha.regions = 0.8, legend = mapviewGetOption("legend"), legend.opacity = 1, trim = TRUE, verbose = mapviewGetOption("verbose"), layer.name = deparse(substitute(x, env = parent.frame())), ...)
"mapView"(x, map = NULL, maxpixels = mapviewGetOption("mapview.maxpixels"), col.regions = mapviewGetOption("raster.palette")(256), at = NULL, na.color = mapviewGetOption("na.color"), values = NULL, map.types = mapviewGetOption("basemaps"), legend = mapviewGetOption("legend"), legend.opacity = 1, trim = TRUE, verbose = mapviewGetOption("verbose"), ...)
"mapView"(x, map = NULL, maxpixels = mapviewGetOption("mapview.maxpixels"), col.regions = mapviewGetOption("raster.palette")(256), at = NULL, na.color = mapviewGetOption("na.color"), values = NULL, map.types = mapviewGetOption("basemaps"), legend = mapviewGetOption("legend"), legend.opacity = 1, trim = TRUE, verbose = mapviewGetOption("verbose"), ...)
"mapView"(x, zcol = NULL, ...)
"mapView"(x, zcol = NULL, ...)
"mapView"(x, map = NULL, map.types = mapviewGetOption("basemaps"), zcol = NULL, burst = FALSE, color = mapviewGetOption("vector.palette"), alpha = 0.8, col.regions = color, alpha.regions = 0.2, na.color = mapviewGetOption("na.color"), at = NULL, cex = 8, lwd = 4, popup = popupTable(x), label, legend = mapviewGetOption("legend"), legend.opacity = 1, layer.name = deparse(substitute(x, env = parent.frame())), verbose = mapviewGetOption("verbose"), ...)
"mapView"(x, map = NULL, zcol = NULL, color = mapviewGetOption("vector.palette")(1), na.color = mapviewGetOption("na.color"), cex = 8, lwd = 4, alpha = 0.9, alpha.regions = 0.4, map.types = mapviewGetOption("basemaps"), verbose = mapviewGetOption("verbose"), layer.name = deparse(substitute(x, env = parent.frame())), label, ...)
"mapView"(x, map = NULL, map.types = mapviewGetOption("basemaps"), zcol = NULL, burst = FALSE, color = mapviewGetOption("vector.palette"), alpha = 0.8, col.regions = color, alpha.regions = 0.2, na.color = mapviewGetOption("na.color"), at = NULL, cex = 8, lwd = 2, popup = popupTable(x), label, legend = mapviewGetOption("legend"), legend.opacity = 1, layer.name = deparse(substitute(x, env = parent.frame())), verbose = mapviewGetOption("verbose"), ...)
"mapView"(x, map = NULL, color = mapviewGetOption("vector.palette")(1), na.color = mapviewGetOption("na.color"), map.types = mapviewGetOption("basemaps"), lwd = 2, alpha = 0.8, alpha.regions = 0.2, verbose = mapviewGetOption("verbose"), layer.name = deparse(substitute(x, env = parent.frame())), label, ...)
"mapView"(x, map = NULL, map.types = mapviewGetOption("basemaps"), zcol = NULL, burst = FALSE, color = mapviewGetOption("vector.palette"), alpha = 0.8, col.regions = color, alpha.regions = 0.2, na.color = mapviewGetOption("na.color"), at = NULL, cex = 8, lwd = 2, popup = popupTable(x), label, legend = mapviewGetOption("legend"), legend.opacity = 1, layer.name = deparse(substitute(x, env = parent.frame())), verbose = mapviewGetOption("verbose"), ...)
"mapView"(x, map = NULL, zcol = NULL, color = mapviewGetOption("vector.palette")(1), na.color = mapviewGetOption("na.color"), lwd = 2, alpha = 0.8, map.types = mapviewGetOption("basemaps"), verbose = mapviewGetOption("verbose"), layer.name = deparse(substitute(x, env = parent.frame())), label, ...)
"mapView"(map.types = mapviewGetOption("basemaps"), easter.egg = FALSE)
"mapview"(...)

Arguments

x

a Raster* or Spatial* object.

map

an optional existing map to be updated/added to

maxpixels

integer > 0. Maximum number of cells to use for the plot. If maxpixels < ncell(x), sampleRegular is used before plotting.

col.regions

color (palette) pixels. See levelplot for details.

at

the breakpoints used for the visualisation. See levelplot for details.

na.color

color for missing values

use.layer.names

should layer names of the Raster* object be used?

values

a vector of values for the visualisation of the layers. Per default these are calculated based on the supplied raster* object.

map.types

character spcifications for the base maps. see http://leaflet-extras.github.io/leaflet-providers/preview/ for available options.

alpha.regions

opacity of the fills or the raster layer(s)

legend

should a legend be plotted

legend.opacity

opacity of the legend

trim

should the raster be trimmed in case there are NAs on the egdes

verbose

should some details be printed during the process

layer.name

the name of the layer to be shown on the map

...

additional arguments passed on to repective functions. See addRasterImage, addCircles, addPolygons, addPolylines for details

zcol

attribute name(s) or column number(s) in attribute table of the column(s) to be rendered. See also Details.

burst

whether to show all (TRUE) or only one (FALSE) layer(s). See also Details.

color

color (palette) for points/polygons/lines

alpha

opacity of the lines or points

cex

attribute name(s) or column number(s) in attribute table of the column(s) to be used for defining the size of circles

lwd

line width

popup

a list of HTML strings with the popup contents, usually created from popupTable. See addControl for details.

label

a character vector of labels to be shown on mouseover. See addControl for details.

easter.egg

well, you might find out if you set this to TRUE

Methods (by class)

• RasterStackBrick: stack / brick
• Satellite: satellite
• SpatialPixelsDataFrame: SpatialPixelsDataFrame
• SpatialGridDataFrame: SpatialGridDataFrame
• SpatialPointsDataFrame: SpatialPointsDataFrame
• SpatialPoints: SpatialPoints
• SpatialPolygonsDataFrame: SpatialPolygonsDataFrame
• SpatialPolygons: SpatialPolygons
• SpatialLinesDataFrame: SpatialLinesDataFrame
• SpatialLines: SpatialLines
• missing: initiate a map without an object
• ANY: alias for ease of typing

Details

If zcol is not NULL but a length one character vector (referring to a column name of the attribute table) and burst is TRUE, one layer for each unique value of zcol will be drawn. The same will happen if burst is a length one character vector (again referring to a column of the attribute table).

The usage of big data sets is performed by loading local copies of json files from temporary storage. This works fine for most of the current browsers. If you are using Google's chrome browser you have to start the browser with the flag -allow-file-access-from-files (i.e for windows: "path_to_your_chrome_installation\chrome.exe --allow-file-access-from-files", for linux: "/usr/bin/google-chrome --allow-access-from-files"). See http://www.chrome-allow-file-access-from-file.com/ for further details.

Examples

## Not run: 
# mapview()
# 
# ### raster data ###
# library(sp)
# library(raster)
# 
# # SpatialPixelsDataFrame
# data(meuse.grid)
# coordinates(meuse.grid) <- ~x+y
# proj4string(meuse.grid) <- CRS("+init=epsg:28992")
# gridded(meuse.grid) <- TRUE
# 
# mapView(meuse.grid, zcol = "soil")
# 
# # raster stack
# m1 <- mapview(poppendorf[[5]])
# m1
# 
# ### point vector data ###
# ## SpatialPointsDataFrame ##
# data(meuse)
# coordinates(meuse) <- ~x+y
# proj4string(meuse) <- CRS("+init=epsg:28992")
# 
# # all layers of meuse
# mapview(meuse, burst = TRUE)
# 
# # only one layer, all info in popups
# mapview(meuse)
# 
# # one specific layer
# mapview(meuse, zcol = "soil") # one layer
# mapview(meuse, zcol = "soil", burst = TRUE) # three layers
# mapview(meuse, burst = "soil") # identical to above
# 
# ## SpatialPoints ##
# meuse_pts <- as(meuse, "SpatialPoints")
# mapview(meuse_pts)
# 
# 
# 
# ### overlay vector on top of raster ###
# mapview(meuse.grid, zcol = "ffreq") + meuse
# 
# ### polygon vector data ###
# data("gadmCHE")
# m <- mapview(gadmCHE)
# m
# 
# ## points on polygons ##
# centres <- data.frame(coordinates(gadmCHE))
# names(centres) <- c("x", "y")
# coordinates(centres) <- ~ x + y
# projection(centres) <- projection(gadmCHE)
# m + centres
# 
# ### lines vector data
# data("atlStorms2005")
# mapview(atlStorms2005)
# mapview(atlStorms2005, burst = TRUE)
# ## End(Not run)