downloadBasemap: Download basemap from Italian National Geoportal

In Simularia/simulariatools: Simularia Tools for the Analysis of Air Pollution Data

Download basemap from Italian National Geoportal

Description

This function tries to download the aerial orthophoto of the requested domain from the Italian National Geoportal. The output is given in png format at the path given in the file parameter.

Usage

downloadBasemap(
  file = file,
  xSW = 410000,
  ySW = 5000500,
  xExt = 5000,
  yExt = 5000,
  crs = 32,
  width = 1024,
  height = 1024,
  units = "px",
  res = 72
)

Arguments

file	Path to output file.
xSW	South West Easting UTM coordinate of the basemap (in metres).
ySW	South West Northing UTM coordinate of the basemap (in metres).
xExt	Easting extension in metres.
yExt	Northing extension in metres.
crs	UTM Coordinate Reference System: either 32 or 33.
width	The basemap width.
height	The basemap height.
units	The unit of measure of width and height. It can be px (pixels, the default), ⁠in⁠ (inches), cm or mm
res	The resolution in dpi.

Value

No value is returned.

Examples

## Not run: 
# Download a basemap of a domain with SW coordinates (410000, 5000500) 
# in the UTM32 CRS and extension 5000m in both directions.

downloadBasemap(file = "./basemap.png", 
                xSW = 410000, ySW = 5000500, xExt = 5000, yExt = 5000)

# Download a basemap of a domain with SW coordinates (410000, 5000500) 
# in the UTM32 CRS and extension 5000m in both directions.
# The file has to be 2048 x 2048 pixels.

downloadBasemap(file = "./basemap.png", 
                xSW = 410000, ySW = 5000500, xExt = 5000, yExt = 5000, 
                width = 2048, height = 2048)
                
# Download a basemap of a domain with SW coordinates (410000, 5000500)
# in the UTM32 CRS and extension 5000m in both directions.
# The file has to be 10cm x 10cm with a resolution of 150 dpi.

downloadBasemap(file = "./basemap.png", 
                xSW = 410000, ySW = 5000500, xExt = 5000, yExt = 5000, 
                width = 10, height = 10, units = "cm", res = 150)

## End(Not run)

Simularia/simulariatools documentation built on Nov. 9, 2023, 12:36 p.m.