this function produces an interactive view of the specified spatial object(s) on top of the specified base maps.
# S4 method for RasterLayer
mapView(
x,
map = NULL,
maxpixels = mapviewGetOption("mapview.maxpixels"),
col.regions = mapviewGetOption("raster.palette"),
at = NULL,
na.color = mapviewGetOption("na.color"),
use.layer.names = mapviewGetOption("use.layer.names"),
map.types = mapviewGetOption("basemaps"),
alpha.regions = 0.8,
legend = mapviewGetOption("legend"),
legend.opacity = 1,
trim = mapviewGetOption("trim"),
verbose = mapviewGetOption("verbose"),
layer.name = NULL,
homebutton = mapviewGetOption("homebutton"),
native.crs = mapviewGetOption("native.crs"),
method = mapviewGetOption("method"),
label = TRUE,
query.type = mapviewGetOption("query.type"),
query.digits = mapviewGetOption("query.digits"),
query.position = mapviewGetOption("query.position"),
query.prefix = mapviewGetOption("query.prefix"),
viewer.suppress = mapviewGetOption("viewer.suppress"),
hide = FALSE,
...
)# S4 method for stars
mapView(
x,
band = 1,
map = NULL,
maxpixels = mapviewGetOption("mapview.maxpixels"),
col.regions = mapviewGetOption("raster.palette"),
at = NULL,
na.color = mapviewGetOption("na.color"),
use.layer.names = mapviewGetOption("use.layer.names"),
map.types = mapviewGetOption("basemaps"),
alpha.regions = 0.8,
legend = mapviewGetOption("legend"),
legend.opacity = 1,
trim = mapviewGetOption("trim"),
verbose = mapviewGetOption("verbose"),
layer.name = NULL,
homebutton = mapviewGetOption("homebutton"),
native.crs = mapviewGetOption("native.crs"),
method = mapviewGetOption("method"),
label = TRUE,
query.type = mapviewGetOption("query.type"),
query.digits = mapviewGetOption("query.digits"),
query.position = mapviewGetOption("query.position"),
query.prefix = mapviewGetOption("query.prefix"),
viewer.suppress = mapviewGetOption("viewer.suppress"),
pane = "auto",
hide = FALSE,
...
)
# S4 method for stars_proxy
mapView(
x,
band = 1,
map = NULL,
maxpixels = mapviewGetOption("mapview.maxpixels"),
col.regions = mapviewGetOption("raster.palette"),
at = NULL,
na.color = mapviewGetOption("na.color"),
use.layer.names = mapviewGetOption("use.layer.names"),
map.types = mapviewGetOption("basemaps"),
alpha.regions = 0.8,
legend = mapviewGetOption("legend"),
legend.opacity = 1,
trim = mapviewGetOption("trim"),
verbose = mapviewGetOption("verbose"),
layer.name = NULL,
homebutton = mapviewGetOption("homebutton"),
native.crs = mapviewGetOption("native.crs"),
method = mapviewGetOption("method"),
label = TRUE,
query.type = mapviewGetOption("query.type"),
query.digits = mapviewGetOption("query.digits"),
query.position = mapviewGetOption("query.position"),
query.prefix = mapviewGetOption("query.prefix"),
viewer.suppress = mapviewGetOption("viewer.suppress"),
pane = "auto",
hide = FALSE,
...
)
# S4 method for RasterStackBrick
mapView(
x,
map = NULL,
maxpixels = mapviewGetOption("mapview.maxpixels"),
col.regions = mapviewGetOption("raster.palette"),
at = NULL,
na.color = mapviewGetOption("na.color"),
use.layer.names = TRUE,
map.types = mapviewGetOption("basemaps"),
legend = mapviewGetOption("legend"),
legend.opacity = 1,
trim = TRUE,
verbose = mapviewGetOption("verbose"),
homebutton = mapviewGetOption("homebutton"),
method = mapviewGetOption("method"),
label = TRUE,
query.type = c("mousemove", "click"),
query.digits = mapviewGetOption("query.digits"),
query.position = mapviewGetOption("query.position"),
query.prefix = "Layer",
viewer.suppress = mapviewGetOption("viewer.suppress"),
hide = FALSE,
...
)
# S4 method for Satellite
mapView(
x,
map = NULL,
maxpixels = mapviewGetOption("mapview.maxpixels"),
col.regions = mapviewGetOption("raster.palette"),
at = NULL,
na.color = mapviewGetOption("na.color"),
map.types = mapviewGetOption("basemaps"),
legend = mapviewGetOption("legend"),
legend.opacity = 1,
trim = TRUE,
verbose = mapviewGetOption("verbose"),
homebutton = mapviewGetOption("homebutton"),
method = c("bilinear", "ngb"),
label = TRUE,
hide = FALSE,
...
)
# S4 method for sf
mapView(
x,
map = NULL,
pane = "auto",
canvas = useCanvas(x),
viewer.suppress = mapviewGetOption("viewer.suppress"),
zcol = NULL,
burst = FALSE,
color = mapviewGetOption("vector.palette"),
col.regions = mapviewGetOption("vector.palette"),
at = NULL,
na.color = mapviewGetOption("na.color"),
cex = 6,
lwd = lineWidth(x),
alpha = 0.9,
alpha.regions = regionOpacity(x),
na.alpha = regionOpacity(x),
map.types = mapviewGetOption("basemaps"),
verbose = mapviewGetOption("verbose"),
popup = TRUE,
layer.name = NULL,
label = zcol,
legend = mapviewGetOption("legend"),
legend.opacity = 1,
homebutton = mapviewGetOption("homebutton"),
native.crs = FALSE,
highlight = mapviewHighlightOptions(x, alpha.regions, alpha, lwd),
maxpoints = getMaxFeatures(x),
hide = FALSE,
...
)
# S4 method for sfc
mapView(
x,
map = NULL,
pane = "auto",
canvas = useCanvas(x),
viewer.suppress = mapviewGetOption("viewer.suppress"),
color = standardColor(x),
col.regions = standardColRegions(x),
at = NULL,
na.color = mapviewGetOption("na.color"),
cex = 6,
lwd = lineWidth(x),
alpha = 0.9,
alpha.regions = regionOpacity(x),
map.types = mapviewGetOption("basemaps"),
verbose = mapviewGetOption("verbose"),
popup = NULL,
layer.name = deparse(substitute(x, env = parent.frame())),
label = makeLabels(x),
legend = mapviewGetOption("legend"),
legend.opacity = 1,
homebutton = mapviewGetOption("homebutton"),
native.crs = FALSE,
highlight = mapviewHighlightOptions(x, alpha.regions, alpha, lwd),
maxpoints = getMaxFeatures(x),
hide = FALSE,
...
)
# S4 method for character
mapView(
x,
map = NULL,
tms = TRUE,
color = standardColor(),
col.regions = standardColRegions(),
at = NULL,
na.color = mapviewGetOption("na.color"),
cex = 6,
lwd = 2,
alpha = 0.9,
alpha.regions = 0.6,
na.alpha = 0.6,
map.types = mapviewGetOption("basemaps"),
verbose = FALSE,
layer.name = x,
homebutton = mapviewGetOption("homebutton"),
native.crs = FALSE,
canvas = FALSE,
viewer.suppress = mapviewGetOption("viewer.suppress"),
...
)
# S4 method for numeric
mapView(x, y, type = "p", grid = TRUE, label, ...)
# S4 method for data.frame
mapView(
x,
xcol,
ycol,
grid = TRUE,
aspect = 1,
popup = leafpop::popupTable(x, className = "mapview-popup"),
label,
crs = NA,
...
)
# S4 method for XY
mapView(
x,
map = NULL,
pane = "auto",
canvas = useCanvas(x),
viewer.suppress = mapviewGetOption("viewer.suppress"),
color = standardColor(x),
col.regions = standardColRegions(x),
at = NULL,
na.color = mapviewGetOption("na.color"),
cex = 6,
lwd = lineWidth(x),
alpha = 0.9,
alpha.regions = regionOpacity(x),
map.types = mapviewGetOption("basemaps"),
verbose = mapviewGetOption("verbose"),
popup = NULL,
layer.name = deparse(substitute(x, env = parent.frame(1))),
label = makeLabels(x),
legend = mapviewGetOption("legend"),
legend.opacity = 1,
homebutton = mapviewGetOption("homebutton"),
native.crs = FALSE,
highlight = mapviewHighlightOptions(x, alpha.regions, alpha, lwd),
maxpoints = getMaxFeatures(x),
hide = FALSE,
...
)
# S4 method for XYZ
mapView(x, layer.name = deparse(substitute(x, env = parent.frame(1))), ...)
# S4 method for XYM
mapView(x, layer.name = deparse(substitute(x, env = parent.frame(1))), ...)
# S4 method for XYZM
mapView(x, layer.name = deparse(substitute(x, env = parent.frame(1))), ...)
# S4 method for bbox
mapView(
x,
layer.name = deparse(substitute(x, env = parent.frame(1))),
alpha.regions = 0.2,
...
)
# S4 method for missing
mapView(map.types = mapviewGetOption("basemaps"), ...)
# S4 method for `NULL`
mapView(x, ...)
# S4 method for list
mapView(
x,
map = NULL,
zcol = NULL,
burst = FALSE,
color = mapviewGetOption("vector.palette"),
col.regions = mapviewGetOption("vector.palette"),
at = NULL,
na.color = mapviewGetOption("na.color"),
cex = 6,
lwd = lapply(x, lineWidth),
alpha = 0.9,
alpha.regions = lapply(x, regionOpacity),
na.alpha = lapply(x, regionOpacity),
map.types = mapviewGetOption("basemaps"),
verbose = mapviewGetOption("verbose"),
popup = TRUE,
layer.name = deparse(substitute(x, env = parent.frame())),
label = lapply(x, makeLabels),
legend = mapviewGetOption("legend"),
homebutton = mapviewGetOption("homebutton"),
native.crs = FALSE,
hide = FALSE,
...
)
# S4 method for ANY
mapview(...)
# S4 method for SpatialPixelsDataFrame
mapView(
x,
map = NULL,
zcol = NULL,
maxpixels = mapviewGetOption("mapview.maxpixels"),
col.regions = mapviewGetOption("raster.palette"),
at = NULL,
na.color = mapviewGetOption("na.color"),
use.layer.names = FALSE,
map.types = mapviewGetOption("basemaps"),
alpha.regions = 0.8,
legend = mapviewGetOption("legend"),
legend.opacity = 1,
trim = TRUE,
verbose = mapviewGetOption("verbose"),
layer.name = NULL,
homebutton = mapviewGetOption("homebutton"),
native.crs = FALSE,
method = mapviewGetOption("method"),
label = TRUE,
query.type = c("mousemove", "click"),
query.digits,
query.position = "topright",
query.prefix = "Layer",
viewer.suppress = mapviewGetOption("viewer.suppress"),
hide = FALSE,
...
)
# S4 method for SpatialGridDataFrame
mapView(
x,
map = NULL,
zcol = NULL,
maxpixels = mapviewGetOption("mapview.maxpixels"),
col.regions = mapviewGetOption("raster.palette"),
at = NULL,
na.color = mapviewGetOption("na.color"),
use.layer.names = FALSE,
map.types = mapviewGetOption("basemaps"),
alpha.regions = 0.8,
legend = mapviewGetOption("legend"),
legend.opacity = 1,
trim = TRUE,
verbose = mapviewGetOption("verbose"),
layer.name = NULL,
homebutton = mapviewGetOption("homebutton"),
native.crs = FALSE,
method = mapviewGetOption("method"),
label = TRUE,
query.type = c("mousemove", "click"),
query.digits,
query.position = "topright",
query.prefix = "Layer",
viewer.suppress = mapviewGetOption("viewer.suppress"),
hide = FALSE,
...
)
# S4 method for SpatialPointsDataFrame
mapView(x, zcol = NULL, layer.name = NULL, ...)
# S4 method for SpatialPoints
mapView(x, zcol = NULL, layer.name = NULL, ...)
# S4 method for SpatialPolygonsDataFrame
mapView(x, zcol = NULL, layer.name = NULL, ...)
# S4 method for SpatialPolygons
mapView(x, zcol = NULL, layer.name = NULL, ...)
# S4 method for SpatialLinesDataFrame
mapView(x, zcol = NULL, layer.name = NULL, ...)
# S4 method for SpatialLines
mapView(x, zcol = NULL, layer.name = NULL, ...)
a Raster* or Spatial* or Satellite or
sf or stars object or a list of any combination of those. Furthermore,
this can also be a data.frame, a numeric vector or a
character string pointing to a tile image folder or file on disk.
If missing, a blank map will be drawn. A value of NULL will return NULL.
an optional existing map to be updated/added to.
integer > 0. Maximum number of cells to use for the plot.
If maxpixels < ncell(x), sampleRegular is used before plotting.
color (palette) pixels.
See levelplot for details.
the breakpoints used for the visualisation.
See levelplot for details.
color for missing values
should layer names of the Raster* object be used?
character spcifications for the base maps. see https://leaflet-extras.github.io/leaflet-providers/preview/ for available options.
opacity of the fills of points, polygons or raster layer(s)
should a legend be plotted
opacity of the legend
should the raster be trimmed in case there are NAs on the edges
should some details be printed during the process
the name of the layer to be shown on the map.
By default this is the character version of whatever is passed to x.
NOTE: This is being passed to underlying leaflet functions as the group argument.
So if you use mapview to set up a map and want to refer to a certain layer
later on, this is what you should refer to in group.
logical, whether to add a zoom-to-layer button to the map. Defaults to TRUE
logical whether to reproject to web map coordinate reference system (web mercator - epsg:3857) or render using native CRS of the supplied data (can also be NA). Default is FALSE which will render in web mercator. If set to TRUE now background maps will be drawn (but rendering may be much quicker as no reprojecting is necessary). Currently only works for simple features.
for raster data only (raster/stars). Method used to compute
values for the resampled layer that is passed on to leaflet. mapview does
projection on-the-fly to ensure correct display and therefore needs to know
how to do this projection. The default is 'bilinear' (bilinear interpolation),
which is appropriate for continuous variables. The other option, 'ngb'
(nearest neighbor), is useful for categorical variables. Ignored if the raster
layer is of class factor in which case "ngb" is used.
For vector data (sf/sp) a character vector of labels to be
shown on mouseover. See addControl for details. For raster
data (Raster*/stars) a logical indicating whether to add image query.
for raster methods only. Whether to show raster value query
on 'mousemove' or 'click'. Ignored if label = FALSE.
for raster methods only. The amount of digits to be shown
by raster value query. Ignored if label = FALSE.
for raster methods only. The position of the raster
value query info box. See position argument of addLegend
for possible values. Ignored if label = FALSE.
for raster methods only. a character string to be shown
as prefix for the layerId. Ignored if label = FALSE.
deprecated.
Use mapviewOptions(viewer.suppress = TRUE/FALSE) instead.
if TRUE the layer will be hidden (i.e. unchecked) in the rendered map.
additional arguments passed on to respective functions.
See addRasterImage, addCircles,
addPolygons, addPolylines for details.
Furthermore, you can pass hidden arguments to some methods. See Details for
a list of supported hidden arguments.
for stars layers, the band number to be plotted.
name of the map pane in which to render features. See
addMapPane for details. Currently only supported for vector layers.
Ignored if canvas = TRUE. The default "auto" will create different panes
for points, lines and polygons such that points overlay lines overlay polygons.
Set to NULL to get default leaflet behaviour where allfeatures
are rendered in the same pane and layer order is determined automatically/sequentially.
whether to use canvas rendering rather than svg. May help performance with larger data. See https://leafletjs.com/SlavaUkraini/reference.html#canvas for more information. Only applicable for vector data. The default setting will decide automatically, based on feature complexity.
attribute name(s) or column number(s) in attribute table of the column(s) to be rendered. See also Details.
whether to show all (TRUE) or only one (FALSE) layer(s). See also Details.
color (palette) for points/polygons/lines
attribute name(s) or column number(s) in attribute table of the column(s) to be used for defining the size of circles
line width
opacity of lines
opacity of missing values
either logical, character vector or a list
of HTML strings with the popup contents, usually created from
popupTable. See addControl for details.
If FALSE or NULL no popups will be created, if TRUE
a table with all feature attributes/columns will be created.
If a character vector of column names, the table will only show the
respective column entries.
either FALSE, NULL or a list of styling
options for feature highlighting on mouse hover.
See highlightOptions for details.
the maximum number of points making up the geometry. In case of lines and polygons this refers to the number of vertices. See Details for more information.
whether the tiles are served as TMS tiles.
numeric vector.
whether to render the numeric vector x as a
point "p" or line "l" plot.
whether to plot a (scatter plot) xy-grid to aid interpretation of the visualisation. Only relevant for the data.frame method.
the column to be mapped to the x-axis. Only relevant for the data.frame method.
the column to be mapped to the y-axis. Only relevant for the data.frame method.
the ratio of x/y axis corrdinates to adjust the plotting space to fit the screen. Only relevant for the data.frame method.
an optional crs specification for the provided data to enable
rendering on a basemap. See argument description in st_sf
for details.
stars: stars
stars_proxy: stars_proxy
RasterStackBrick: stack / brick
Satellite: satellite
sf: st_sf
sfc: st_sfc
character: character
numeric: numeric
data.frame: data.frame
XY: st_sfc
XYZ: st_sfc
XYM: st_sfc
XYZM: st_sfc
bbox: st_bbox
missing: initiate a map without an object
NULL: initiate a map without an object
list: list
ANY: alias for ease of typing
SpatialPixelsDataFrame: SpatialPixelsDataFrame
SpatialGridDataFrame: SpatialGridDataFrame
SpatialPointsDataFrame: SpatialPointsDataFrame
SpatialPoints: SpatialPoints
SpatialPolygonsDataFrame: SpatialPolygonsDataFrame
SpatialPolygons: SpatialPolygons
SpatialLinesDataFrame: SpatialLinesDataFrame
SpatialLines: SpatialLines
Tim Appelhans
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).
NOTE: if XYZ or XYM or XYZM data from package sf is passed to mapview,
dimensions Z and M will be stripped to ensure smooth rendering even though
the popup will potentially still say something like "POLYGON Z".
maxpoints is taken to determine when to switch rendering from svg
to canvas overlay for perfomance. The threshold calculation is done as follows:
if the number of points (in case of point data) or vertices (in case of
polygon or line data) > maxpoints then render using special render
function. Within this render function we approximate the complexity of
features by
maxFeatures <- maxfeatures / (npts(data) / length(data))
where npts determines the number of points/vertices and length
the number of features (points, lines or polygons). When the number of
features in the current view window is larger than maxFeatures then
features are rendered on the canvas, otherwise they are rendered as svg objects
and fully queriable.
Hidden arguments that can be set via ...:
* hide: hide all but the first layer when rendering a RasterStackBrick.
if (FALSE) {
mapview()
## simple features ====================================================
library(sf)
# sf
mapview(breweries)
mapview(franconia)
# sfc
mapview(st_geometry(breweries)) # no popup
# sfg / XY - taken from ?sf::st_point
outer = matrix(c(0,0,10,0,10,10,0,10,0,0),ncol=2, byrow=TRUE)
hole1 = matrix(c(1,1,1,2,2,2,2,1,1,1),ncol=2, byrow=TRUE)
hole2 = matrix(c(5,5,5,6,6,6,6,5,5,5),ncol=2, byrow=TRUE)
pts = list(outer, hole1, hole2)
(pl1 = st_polygon(pts))
mapview(pl1)
## raster ==============================================================
if (interactive()) {
library(plainview)
mapview(plainview::poppendorf[[5]])
}
## spatial objects =====================================================
mapview(leaflet::gadmCHE)
mapview(leaflet::atlStorms2005)
## styling options & legends ===========================================
mapview(franconia, color = "white", col.regions = "red")
mapview(franconia, color = "magenta", col.regions = "white")
mapview(breweries, zcol = "founded")
mapview(breweries, zcol = "founded", at = seq(1400, 2200, 200), legend = TRUE)
mapview(franconia, zcol = "district", legend = TRUE)
clrs <- sf.colors
mapview(franconia, zcol = "district", col.regions = clrs, legend = TRUE)
### multiple layers ====================================================
mapview(franconia) + breweries
mapview(list(breweries, franconia))
mapview(franconia) + mapview(breweries) + trails
mapview(franconia, zcol = "district") + mapview(breweries, zcol = "village")
mapview(list(franconia, breweries),
zcol = list("district", NULL),
legend = list(TRUE, FALSE))
### burst ==============================================================
mapview(franconia, burst = TRUE)
mapview(franconia, burst = TRUE, hide = TRUE)
mapview(franconia, zcol = "district", burst = TRUE)
### ceci constitue la fin du pipe ======================================
library(poorman)
library(sf)
franconia %>%
sf::st_union() %>%
mapview()
franconia %>%
group_by(district) %>%
summarize() %>%
mapview(zcol = "district")
franconia %>%
group_by(district) %>%
summarize() %>%
mutate(area = st_area(.) / 1e6) %>%
mapview(zcol = "area")
franconia %>%
mutate(area = sf::st_area(.)) %>%
mapview(zcol = "area", legend = TRUE)
breweries %>%
st_intersection(franconia) %>%
mapview(zcol = "district")
franconia %>%
mutate(count = lengths(st_contains(., breweries))) %>%
mapview(zcol = "count")
franconia %>%
mutate(count = lengths(st_contains(., breweries)),
density = count / st_area(.)) %>%
mapview(zcol = "density")
}
Run the code above in your browser using DataLab