elevationsToRaster: Create and save a raster fileset specified

In CraigMohn/maptrack3d: Draw 3d maps from SRTM data with GPS tracks

Description

elevationsToRaster create a raster fileset of elevations

Usage

elevationsToRaster(
  rasterFileSetName = "default",
  rasterDir,
  mapDataDir,
  USStatevec = NULL,
  CAProvincevec = NULL,
  USParkvec = NULL,
  worldCountryvec = NULL,
  mapWindow = NULL,
  cropbox = NULL,
  parkDir = NULL,
  mapbuffer = 0,
  mapmergebuffer = 0,
  maxrastercells = 2.5e+08,
  workProj4 = "+proj=longlat +datum=WGS84 +no_defs +ellps=WGS84 +towgs84=0,0,0",
  year = 2017,
  resstr = "_1arc_v3_bil"
)

Arguments

rasterFileSetName	names of saved raster data files
rasterDir	location to load and save raster files
mapDataDir	directory where zipped SRTM data files reside
USStatevec	vector of standard 2-letter abbreviations of US states, or pre-defined regional aggregations of states for use in defining map or finding features to include in the map
CAProvincevec	vector of standard 2-letter abbreviations of Canadian provinvces states, or pre-defined regional aggregations of states for use in defining map or finding features to include in the map
USParkvec	vector of US National Park names
worldCountryvec	vector of 3-letter ISO country abbreviations
mapWindow	a vector of 4 numbers which describe the region drawn. The format is c(lon_min, lon_max, lat_min, lat_max)
cropbox	vector of 4 numbers for cropping the map defined above The format is c(lon_min, lon_max, lat_min, lat_max).
parkDir	location of downloaded US Park boundary shapefiles downloaded from, for example, https://irma.nps.gov/DataStore/
mapbuffer	numeric value to expand defined map
mapmergebuffer	numeric value to expand components of the map defined before merging, to eliminate gaps from minor boundary inconsistencies
maxrastercells	maximum number of cells in each written raster
workProj4	coordinte reference projection string
year	numeric year to use in calls for map boundaries/features
resstr	suffix on SRTM data files after lon/lat info

Details

Create a raster file set containing elevation data from SRTM BIL zip files stored in a local directory

Value

a rasterLayer containing the elevations

CraigMohn/maptrack3d documentation built on March 17, 2021, 7:38 a.m.