To permanently set any of these options, you can add them to <your R installation>/etc/Rprofile.site>. For example, to change the default number of pixels to be visualised for Raster* objects, add a line like this: options(mapviewMaxPixels = 700000) to that file.
mapviewOptions(
platform,
basemaps,
raster.palette,
vector.palette,
verbose,
na.color,
legend,
legend.opacity,
legend.pos,
layers.control.pos,
leafletWidth,
leafletHeight,
viewer.suppress,
homebutton,
homebutton.pos,
native.crs,
raster.size,
mapview.maxpixels,
plainview.maxpixels,
use.layer.names,
trim,
method,
query.type,
query.digits,
query.position,
query.prefix,
maxpoints,
maxpolygons,
maxlines,
pane,
cex,
alpha,
default = FALSE,
console = TRUE,
watch = FALSE,
fgb
)mapviewGetOption(param)
character. The rendering platform to be used. Current options are "leaflet" and "mapdeck".
character. The basemaps to be used for rendering data. See https://leaflet-extras.github.io/leaflet-providers/preview/ for possible values
a color palette function for raster visualisation.
Should be a function that takes an integer as input and returns a vector of colors.
See colorRampPalette for details.
a color palette function for vector visualisation.
Should be a function that takes an integer as input and returns a vector of colors.
See colorRampPalette for details.
logical. Many functions in mapview provide details about their behaviour. Set this to TRUE if you want to see these printed to the console.
character. The default color to be used for NA values.
logical. Whether or not to show a legend for the layer(s).
opacity of the legend.
Where should the legend be placed? One of "topleft", "topright", "bottomleft", "bottomright".
character. Where should the layer control be placed? One of "topleft", "topright", "bottomleft", "bottomright".
height and width of the htmlwidget in px.
whether to render the map in the browser (TRUE)
or the RStudio viewer (FALSE).
logical, whether to add a zoom-to-layer button to the map.
character. Where should the homebutton(s) be placed? One of "topleft", "topright", "bottomleft", "bottomright".
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).
numeric. see the maxBytes argument in addRasterImage
numeric. The maximum amount of pixels allowed for Raster*
objects to be rendered with mapview. Defaults to 500000.
Set this higher if you have a potent machine or are patient enough to wait a little.
numeric. The maximum amount of pixels allowed for Raster*
objects to be rendered with plainview. Defaults to 10000000.
Set this higher if you have a potent machine or are patient enough to wait a little.
whether to use layer names when plotting raster layers.
should the raster be trimmed in case there are NAs on the edges.
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 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.
numeric. Maximum number of points allowed for leaflet overlay rendering. If this number is exceeded rendering will be done using special functionality which will provide much more speed and better handling. This means that standard functionality is reduced. For example adding layers via "+" is not possible anymore.
numeric. Maximum number of polygons allowed for leaflet overlay rendering. If this number is exceeded rendering will be done using special functionality which will provide much more speed and better handling. This means that standard functionality is reduced. For example adding layers via "+" is not possible anymore.
numeric. Maximum number of lines allowed for leaflet overlay rendering. If this number is exceeded rendering will be done using special functionality which will provide much more speed and better handling. This means that standard functionality is reduced. For example adding layers via "+" is not possible anymore.
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.
numeric or attribute name(s) or column number(s) in attribute table of the column(s) to be used for defining the size of circles.
opacity of lines.
logical. If TRUE all options are set to their default values
logical. Should the options be printed to the console
whether to watch a certain environment and automatically render changes to the list of spatial data in that environment. See mapviewWatcher for details.
if set to TRUE mapview will not use 'clasical' leaflet/htmlwidgets
rendering (which embeds data directly in the html) but leverage the speed of
a file format called flatgeobuf (hence, fgb). This has the added benefit that
data is being streamed onto the map, which makes for a pleasant user experience.
It should also help to visualise larger data sets due to a reduced memeory footprint.
A note of warning, data will be attached to the html
via a <src=...> call which means that the html is not selfcontained anymore
(so it cannot be used without an accompanying folder).
character. parameter to be queried.
list of the current options (invisibly). If no arguments are provided the options are printed.
mapviewGetOption: query single mapviewOption parameters
# NOT RUN {
mapviewOptions()
mapviewOptions(na.color = "pink")
mapviewOptions()
mapviewGetOption("platform")
mapviewOptions(default = TRUE)
mapviewOptions()
# }
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