read_dtm: read USDA FUSION format (Bob McGaughey) raster files and...

In jstrunk001/RSForInvt: Remote Sensing FORest INVenTory related analysis tasks, especially FUSION, lidR, NVEL

read USDA FUSION format (Bob McGaughey) raster files and headers

Description

read a single USDA FUSION format raster into an r raster object (raster package). read a single header read headers for all files in directory

Usage

read_dtm(
  dtm_files = NA,
  dir_dtm = NA,
  pattern = "[.]dtm$",
  plot = F,
  NA_val = -1,
  return_polygon = F,
  mosaic = T
)

read_dtm_header(
  dtm_file,
  dir_dtm = NA,
  pattern = "[.]dtm$",
  recursive = TRUE,
  out_file = NA
)

Arguments

dir_dtm	path to directory containing FUSION dtm files
pattern	extension for FUSION dtm files
plot	with 'dtm_file' optionally plot dtm with rgl and rasterVis
NA_val	recoded fusion NA values to R NA - unfotunately FUSION uses -1.0 as NA values ..
dtm_file	path to specific FUSION dtm file
ncore	how many cores to use in processing dtm files - used with 'dir_dtm'

Details

the DEM format is an esoteric raster format used only by (and required by) FUSION gridmetrics. SInce it is required and we extensivey use FUSION (esp gridmetrics) we need the ability to interact with this file format.

Revision History

0.1	2014 July 09 - Operational

Value

raster, rasters, or dataframe with header(s) information

Author(s)

Jacob Strunk

See Also

read_las

Examples

many_dtms=read_dtm_header(dir_dtm="c:\\temp\\dtm_files" ,out_file="c:\\temp\\headers.csv")

one_dtm=read_dtm_header("//dnrgpoly112/e$/rs_prototype/dtm/dtm_files/38_58.dtm")

jstrunk001/RSForInvt documentation built on April 18, 2022, 11:03 p.m.