Raster Data Extraction Using R for Climate Analysis

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6 likes•1,952 views

Simultaneously sample hundreds of PRISM climate rasters at several point locations to build a multi-year spatial temporal dataset.

Environment Technology

@MicheleTobias @GeospatialUCD
Using R for Climate
Raster Data Extraction
Michele Tobias, PhD
CalGIS – Apr. 14-16, 2014 – Monterey, CA

@MicheleTobias @GeospatialUCD
Objective
Sample 1,416 climate rasters (x 3 datasets) with a
point shapefile
… as quickly as possible.

@MicheleTobias @GeospatialUCD
Raster Files
PRISM Dataset – Oregon State University
Monthly climate rasters
(also available: daily)
1895 – present
Datasets: Precipitation
Temperature (Min, Max, & Mean)
http://prism.oregonstate.edu/

@MicheleTobias @GeospatialUCD
RasterFiles
January 1953, Precipitation

@MicheleTobias @GeospatialUCD
PointLocations

@MicheleTobias @GeospatialUCD
Processing Options
QGIS – Point Sampling Tool
ArcGIS – Extract by Points Tool
GRASS – v.what.rast
R – Extract Command
Probably lots of other ways...

@MicheleTobias @GeospatialUCD
Questions?
Michele Tobias
mmtobias@ucdavis.edu
geospatial.ucdavis.edu

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Raster Data Extraction Using R for Climate Analysis

1. @MicheleTobias @GeospatialUCD Using R for Climate Raster Data Extraction Michele Tobias, PhD CalGIS – Apr. 14-16, 2014 – Monterey, CA

2. @MicheleTobias @GeospatialUCD Objective Sample 1,416 climate rasters (x 3 datasets) with a point shapefile … as quickly as possible.

3. @MicheleTobias @GeospatialUCD Raster Files PRISM Dataset – Oregon State University Monthly climate rasters (also available: daily) 1895 – present Datasets: Precipitation Temperature (Min, Max, & Mean) http://prism.oregonstate.edu/

4. @MicheleTobias @GeospatialUCD RasterFiles January 1953, Precipitation

5. @MicheleTobias @GeospatialUCD PointLocations

6. @MicheleTobias @GeospatialUCD Processing Options QGIS – Point Sampling Tool ArcGIS – Extract by Points Tool GRASS – v.what.rast R – Extract Command Probably lots of other ways...

7. @MicheleTobias @GeospatialUCD

8. @MicheleTobias @GeospatialUCD

9. @MicheleTobias @GeospatialUCD Results

10. @MicheleTobias @GeospatialUCD Questions? Michele Tobias mmtobias@ucdavis.edu geospatial.ucdavis.edu