SRTM.list: List the available SRTM files
In dazhiyang/SolarData: Work with freely available solar data
Description
Usage
Arguments
Details
Value
Author(s)
See Also
Description
This function retrieves the directory listing, i.e., available files from https://dds.cr.usgs.gov/.
Usage
1
Arguments
resolution
a number indicating the resolution of the DEM, two options are available: 1 or 3, see details
want.plot
boolean, if TRUE return plot
Details
Souce: https://dds.cr.usgs.gov/srtm/version2_1/Documentation/Quickstart.pdf
SRTM data are distributed in two levels: SRTM1 (for the United States and its territories and possessions) with data sampled at 1 arc-second intervals in latitude and longitude (or 30 meters or 98 feet), and SRTM3 (for the world) sampled at 3 arc-seconds (or 90 meters or 295 feet). Three arc-second data are generated by three by three averaging of the one arc-second samples.
File names refer to the latitude and longitude of the lower left corner of the tile - e.g. N37W105 has its lower left corner at 37 degrees north latitude and 105 degrees west longitude. To be more exact, these coordinates refer to the geometric center of the lower left pixel. In addition, the files are separated by geographical zones, i.e., parent directory. For example, SRTM1 contains 7 zones, whereas SRTM3 divides the zones by continent.
SRTM3 files contain 1201 lines and 1201 samples. The rows at the north and south edges as well as the columns at the east and west edges of each cell overlap and are identical to the edge rows and columns in the adjacent cell. SRTM1 files contain 3601 lines and 3601 samples, with similar overlap.
Value
A vector of character strings, indicating the available file names.
Author(s)
D. Yang
See Also
dazhiyang/SolarData documentation built on April 19, 2021, noon
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Description Usage Arguments Details Value Author(s) See Also
Description
This function retrieves the directory listing, i.e., available files from https://dds.cr.usgs.gov/.
Usage
1 |
Arguments
resolution |
a number indicating the resolution of the DEM, two options are available: 1 or 3, see details |
want.plot |
boolean, if |
Details
Souce: https://dds.cr.usgs.gov/srtm/version2_1/Documentation/Quickstart.pdf
SRTM data are distributed in two levels: SRTM1 (for the United States and its territories and possessions) with data sampled at 1 arc-second intervals in latitude and longitude (or 30 meters or 98 feet), and SRTM3 (for the world) sampled at 3 arc-seconds (or 90 meters or 295 feet). Three arc-second data are generated by three by three averaging of the one arc-second samples.
File names refer to the latitude and longitude of the lower left corner of the tile - e.g. N37W105 has its lower left corner at 37 degrees north latitude and 105 degrees west longitude. To be more exact, these coordinates refer to the geometric center of the lower left pixel. In addition, the files are separated by geographical zones, i.e., parent directory. For example, SRTM1 contains 7 zones, whereas SRTM3 divides the zones by continent.
SRTM3 files contain 1201 lines and 1201 samples. The rows at the north and south edges as well as the columns at the east and west edges of each cell overlap and are identical to the edge rows and columns in the adjacent cell. SRTM1 files contain 3601 lines and 3601 samples, with similar overlap.
Value
A vector of character strings, indicating the available file names.
Author(s)
D. Yang
See Also
R Package Documentation
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Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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