SRTM_GSOD_elevation

SRTM_GSOD_elevation

SRTM_GSOD_elevation

Format

A data frame with 28339 observations of 2 elements:

STNID

Unique station ID, a concatenation of USAF and WBAN number, used for merging with station data weather files

ELEV_M_SRTM_90m

Elevation in metres extracted from SRTM data (Jarvis et al. 2008)

Station elevation information for the US National Centers for Environmental Information (NCEI) Global Surface Summary of the Day (GSOD) weather data. The original file has missing and incorrect geographic data including location (LAT/LON) and elevation. This data frame provides an alternative set of elevation values with the following changes to the original list of stations from the NCEI:

  1. Stations with both a latitude and longitude of 0 degrees were removed.

  2. Stations with longitude values that are beyond -180/180 degrees were removed.

  3. Stations with latitude values that are beyond -90/90 degrees were removed.

  4. A new field for elevation is included, ELEV_M_SRTM_90m. This was created using mean values of a 200m buffer around the reported LAT/LON station location within the CGIAR-CSI hole-filled 90m SRTM digital elevation model (Jarvis et al. 2008).

For more on this, please consult the document available from the GSODR GitHub repository detailing the process used to generate these data, https://github.com/ropensci/GSODR/blob/master/data-raw/fetch_isd-history.md

Source

ftp://ftp.ncdc.noaa.gov/pub/data/noaa/isd-history.csv

Note

Users of these data should take into account the following (from the NCEI website): “The following data and products may have conditions placed on their international commercial use. They can be used within the U.S. or for non-commercial international activities without restriction. The non-U.S. data cannot be redistributed for commercial purposes. Re-distribution of these data by others must provide this same notification.”

The SRTM_GSOD_elevation data are automatically loaded with the GSODR package and merged with the latest available data from the NCEI in the "isd-history.csv" file.

References

Jarvis, A., Reuter, H. I, Nelson, A., Guevara, E. (2008) Hole-filled SRTM for the globe Version 4, available from the CGIAR-CSI SRTM 90m Database http://srtm.csi.cgiar.org