mz_tile_coordinates: Specify tile coordinates

In rmapzen: Client for 'Mapzen' and Related Map APIs

Specify tile coordinates

Description

mz_vector_tiles requires tile coordinates or some other specification of the region that is to be drawn. mz_vector_tiles will automatically convert its inputs to vector tiles, so you generally won't need to use this function directly.

Usage

mz_tile_coordinates(x, y, z)

as.mz_tile_coordinates(obj, ...)

## S3 method for class 'mz_tile_coordinates'
as.mz_tile_coordinates(obj, ...)

## S3 method for class 'mz_bbox'
as.mz_tile_coordinates(obj, ..., z = NULL, height = NULL, width = NULL)

## S3 method for class 'mz_location'
as.mz_tile_coordinates(obj, ..., z = 15L)

## S3 method for class 'mz_geocode_result'
as.mz_tile_coordinates(obj, ..., z = 15L)

Arguments

x	integer vector of x-coordinates
y	integer vector of y-coordinates
z	integer between 0 and 19 specifying the zoom level
obj	An object that can be converted to tile coordinates
...	Other arguments passed on to methods
height	Height in pixels
width	Width in pixels

See Also

mz_vector_tiles, mz_bbox

Examples

mz_tile_coordinates(19293, 24641, 16)

## can specify multiple contiguous tiles:
mz_tile_coordinates(19293:19294, 24641:24642, 16)

## a rectangular bounding box can be converted to tile coordinates:
as.mz_tile_coordinates(mz_rect(min_lon = -122.2856,
                               min_lat = 37.73742,
                               max_lon = -122.1749,
                               max_lat = 37.84632))

## zoom level is calculated based on desired pixel dimensions of the map:
as.mz_tile_coordinates(mz_rect(min_lon = -122.2856,
                               min_lat = 37.73742,
                               max_lon = -122.1749,
                               max_lat = 37.84632), height = 750, width = 1000)

## a bounding box can also be calculated:
as.mz_tile_coordinates(mz_bbox(oakland_public))

rmapzen documentation built on Oct. 17, 2023, 5:06 p.m.