read_fgd_dem {fgdr}

Read and Parse Fundamental Geospatial Data (FGD) dem file

Description

The JPGIS (GML) format file provided by FGD as input, the digital elevation models in the file are read as a data.frame or spatial object (raster, stars or terra). Supporting FGD Version 4.1 (2016/10/31)

Usage

read_fgd_dem(file, resolution = c(5, 10), return_class)

Arguments

file

Path to XML file

resolution

the number of dem mesh size resolution: 5m or 10m

return_class

one of return object class: 'data.table' for faster than data.frame, 'data.frame', 'raster', 'stars' or 'terra'

Value

A tibble (data.frame), raster, stars or terra

See Also

https://fgd.gsi.go.jp/download/ref_dem.html

Examples

fgd_5dem <- system.file("extdata/FG-GML-0000-00-00-DEM5A-dummy.xml", package = "fgdr")
read_fgd_dem(fgd_5dem,
             resolution = 5,
             return_class = "data.table")
read_fgd_dem(fgd_5dem,
             resolution = 5,
             return_class = "data.frame")
# return as raster
read_fgd_dem(fgd_5dem,
             resolution = 5,
             return_class = "raster")
# return as stars
fgd_10dem <- system.file("extdata/FG-GML-0000-10-dem10b-dummy.xml", package = "fgdr")
read_fgd_dem(fgd_10dem,
             resolution = 10,
             return_class = "stars")