Description Usage Arguments Details Value
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.
1 | getPRISMNormal(type, month = NA, spGrid = TRUE)
|
type |
A string denoting the datatype to be downloaded. "tmax", "tmin", "ppt". |
month |
Month of year to download data for. |
|
for |
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.'
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'
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