fileTypeBathy: Download integrated land topography and ocean bathymetry...

In r-forge/satin: Functions for downloading, reading and displaying satellite data for oceanographic applications with R

Description

To download integrated land topography and ocean bathymetry data from ETOPO1 in several file formats Global Relief Model.

Usage

fileTypeBathy(lons, lats, resolution = 1, filetype)

Arguments

lons	the minimum and maximum desired longitude values, in the range -180W to 180E, or 0 to 360E, regardless of the range of the original data. For example, c(-118, -105.5) is the same that c(242, 254.5).
lats	the minimum and maximum desired latitude values, in the range -90S to 90N. Values are in decimal degrees north. For example, c(22.2, 32.5).
resolution	a number indicating the spatial resolution of your data in decimal degrees. If filetype is a .png file, this is ignored.
filetype	the type of data file that you want to download. For example, you can use one of the following: ".asc", "ESRI.asc", "GoogleEarth", ".grd", ".hdf", ".mat", ".nc", ".ncHeader", "small.png", "medium.png", "large.png", "transparent.png", ".tif", ".xyz"

Author(s)

Raul O Martinez-Rincon and Héctor Villalobos

References

Amante, C. and B. W. Eakins, ETOPO1 1 Arc-Minute Global Relief Model: Procedures, Data Sources and Analysis. NOAA Technical Memorandum NESDIS NGDC-24, 19 pp, March 2009.

http://www.ngdc.noaa.gov/mgg/global/global.html

Examples

## Get a ".xyz" of integrated land topography and ocean bathymetry 
## with a spatial resolution of 0.1 degrees of the northwest of Mexico.

## Settings
lons <- c(-118, -105.5)
lats <- c(22.2, 32.5)
resolution <- 0.1
filetype <- ".xyz"

fileTypeBathy(lons, lats, resolution, filetype)
## The downloaded file ("tmp_254.5E32.5N.xyz") contains 3 columns: 
## longitude (in 0 - 360E format), latitude, and the altimetry

r-forge/satin documentation built on Feb. 18, 2022, 2:39 a.m.