getPRISMNormal: PRISM Normal Download Function

In kendonB/prismUtils: PRISM Weather Utilities

Description

This function downloads a PRISM weather data normal grid to disk or the R-environment. If downloading to disk, .bil files are downloaded; if downloading to the R-environment, a SpatialGridDataFrame is downloaded. A .RData file containing download info is also provided.

Usage

getPRISMNormal(type, month = NA, spGrid = TRUE)

Arguments

type	A string denoting the datatype to be downloaded. "tmax", "tmin", "ppt".
month	Month of year to download data for. NA indicates all months.
logical	for SpatialGridDataFrame return value vs storing in working directory. Default is TRUE.

Details

The data these scripts access are subject to the PRISM Gridded Climate Data - Terms of Use. As of 07/06/2014, these are available at http://www.prism.oregonstate.edu/documents/PRISM_terms_of_use.pdf NOTE in particular the Data section: 'All data (gridded, polygon, tabular, graphical) retrieved from the website or otherwise provided on the website may be freely reproduced and distributed for non-commercial purposes.

When referring to the data, the source must be clearly and prominently stated and include, at a minimum, our name, URL, and the date of data creation. For example: PRISM Climate Group, Oregon State University, http://prism.oregonstate.edu, created 4 Feb 2004.

Sale or other commercial use of the data must be arranged by contacting the PRISM Climate Group.'

Value

Either a SpatialGridDataFrame from the sp package (spGrid==TRUE) or the bil and associated files are stored in the working directory and the function returns TRUE/FALSE depending on the success of the unzipping. The current naming convention for the bil files (as of 12/13/2013) are for daily: 'PRISM_type_stable_4kmD1_yyyymmdd_bil.bil' e.g. 'PRISM_tmax_stable_4kmD1_19990101_bil.bil' monthly: # 'PRISM_type_stable_4kmM2_yyyymm_bil.bil'

kendonB/prismUtils documentation built on May 20, 2019, 9:04 a.m.