Create a stamen or line map of the location of a list of LiPD objects
baseMap(
lon,
lat,
map.type = "line",
f = 0,
restrict.map.range = TRUE,
projection = "mollweide",
bound.circ = FALSE,
global = FALSE,
extend.range = 1,
...
)longitude(s) range to map
latitude(s) range to map
"stamen" or "line"
buffer for the map range
TRUE or FALSE. Trim the size of the map to the points, for "line" map type
Map project. All options on: ?mapproject
Draw a boundary circle around a polar projection. TRUE or FALSE(default).
Should the scope of the map be global? TRUE or FALSE(default).
increase the span of the map by this much (lat/long degrees)
Arguments passed on to maps::map
databasecharacter string naming a geographical database, a list of
x, y, and names obtained from a previous call to
map or a spatial object of class SpatialPolygons or SpatialLines.
The string choices include a world map,
three USA databases (usa, state,
county), and more (type help(package='maps') to see the package index). If the requied database is in a different package that has not been attached, the string may be started with "packagename::". The
location of the map databases may be overridden by setting the
R_MAP_DATA_DIR environment variable.
regionscharacter vector that names the polygons to draw.
Each database is composed of a collection of polygons, and each polygon has
a unique name.
When a region is composed of more than one polygon, the individual polygons
have the name of the region, followed by a colon and a qualifier,
as in michigan:north and michigan:south.
Each element of regions is matched
against the polygon names in the database and, according to
exact, a subset is selected for drawing. The regions may also be
defined using (perl) regular expressions. This makes it possible to use
'negative' expressions like "Norway(?!:Svalbard)", which means Norway
and all islands except Svalbard. All entries are case insensitive.
The default selects all polygons in the database.
exactIf TRUE, only exact matches with regions are
selected for drawing.
If FALSE, each element of regions is matched
as a regular expression
against the polygon names in the database and all matches are selected
for drawing.
boundaryIf FALSE, boundary segments are not drawn.
A boundary segment is a line segment of the map that bounds only
one of the polygons to be drawn.
This argument is ignored if fill is TRUE.
interiorIf FALSE, interior segments are not drawn.
An interior segment is a line segment of the map that bounds two
of the polygons to be drawn.
This argument is ignored if fill is TRUE.
parametersnumeric vector of parameters for use with the
projection argument.
This argument is optional only in the sense that certain
projections do not require additional parameters.
If a projection does require additional parameters, these
must be given in the parameters argument.
orientationa vector c(latitude, longitude, rotation) describing where
the map should be centered and a clockwise rotation (in degrees)
about this center.
filllogical flag that says whether to draw lines or fill areas.
If FALSE, the lines bounding each region will be drawn (but
only once, for interior lines).
If TRUE, each region will be filled using colors from the
col = argument, and bounding lines are drawn by default using par("fg").
To hide the bounding lines, use border=NA (see ...).
colvector of colors.
If fill is FALSE, the first color is used for plotting
all lines, and any other colors are ignored.
Otherwise, the colors are matched one-one with the polygons
that get selected by the region argument (and are reused
cyclically, if necessary). If fill = TRUE, the default boundary line colour
is given by par("fg"). To change this, you can use the border
argument (see '...').
A color of NA causes the corresponding region to be deleted
from the list of polygons to be drawn.
Polygon colors are assigned after polygons are deleted due to values
of the xlim and ylim arguments.
plotlogical flag that specifies whether plotting
should be done.
If plot is TRUE the return value of map will
not be printed automatically .
addlogical flag that specifies whether to add to the
current plot.
If FALSE, a new plot is begun, and a new coordinate
system is set up.
namesonlyIf TRUE, the return value will be a character vector of
the names of the selected polygons. See the Value section below.
xlimtwo element numeric
vector giving a range of longitudes, expressed
in degrees, to which drawing
should be restricted.
Longitude is measured in degrees east of Greenwich, so that, in particular,
locations in the USA have negative longitude.
If fill = TRUE, polygons selected by region must be entirely inside
the xlim range.
The default value of this argument spans the entire longitude range
of the database.
ylimtwo element
numeric vector giving a range of latitudes,
expressed in degrees, to which drawing
should be restricted.
Latitude is measured in degrees north of the
equator, so that, in particular,
locations in the USA have positive latitude.
If fill = TRUE, polygons selected by region must be entirely inside
the ylim range.
The default value of this argument spans the entire latitude range
of the database.
wrapBoolean or a numeric vector. If TRUE, lines that cross too far across the map
(due to a strange projection) are omitted. If wrap is a vector of length 2 or more, it is interpreted as the longitude range to be used for a global map, e.g. c(-180,180) or c(0,360). This wrapping even works when fill=TRUE and is performed before any projection (so the range must always be in degrees). However, the wrapping is performed after xlim, ylim are applied, so these options should probably never be combined. If there is a third component, this signifies the latitude at which Antarctica will be "closed". The default value is -89.9. Special values are NA (don't draw Antarctica at all) and 0 (draw the line at the latitude of the extremal points, not at a fixed lower latitude).
resolutionnumber that specifies the resolution with which
to draw the map.
Resolution 0 is the full resolution of the database.
Otherwise, just before polylines are plotted they are thinned:
roughly speaking, successive points on the polyline that are
within resolution device pixels of one another are collapsed
to a single point (see the Reference for further details).
Thinning is not performed if plot = FALSE or when polygons are drawn (fill = TRUE or database is a list of polygons).
typecharacter string that controls drawing of the map.
Aside from the default type = "l", the value type = "n"
can be used
to set up the coordinate system and projection for a map that will
be added to in later calls.
bgbackground color.
marmargins, as in par. Defaults allow for map.axes().
myborderscalar or vector of length 2 specifying the porportion of the plot to add to the defined or computed limits as borders.
namefieldA vector of column names to be used as region name if database is a SpatialPolygonsDataFrame. Ignored in all other cases.
lforceLimit enforcement. Only taken into account if xlim and/or ylim are defined and (for "s" and "l") a projection is used. Possible values are "n" (none) "e" (exact),"s" (small),"l" (large).
If lforce="e", map data is restricted exactly to the given limits prior to projection. This option affects the output value of the map, not only the plot window.
If lforce="s", the four corners defined by xlim and ylim are projected and the plot window is restricted to the largest rectangle inside this region.
"l" will result in a larger rectangle that includes the four corners. However, the parts that fall outside the original limits may not be complete (only polygons that partially fall inside the boundaries are included). This will also work with fill=TRUE. In this case the output value of the data is not changed, only the plot window is affected. These options are only useful for some projections.
ggmap base map