writers.p2g¶
The points to grid writer takes in a stream of point data and writes out gridded summaries of the stream. Each cell in the output grids can give one of the: minimum value, maximum value, average value, average value, inverse distance weighted interpolation (for sparse points), or density. The points to grid writer supports creating multiple output grids simultaneously, so it is possible to generate all grid variants in one pass.
Note
A project called lidar2dems by Applied GeoSolutions integrates the P2G writer and other PDAL components into a series of scripts and utilities that make it more convenient to do DEM production with PDAL.
Example¶
{
"pipeline":[
{
"type":"readers.las",
"filename":"inputfile.las"
},
{
"type":"writers.p2g",
"grid_dist_x":"6.0",
"grid_dist_y":"6.0",
"radius":"8.4852813742385713",
"filename":"autzen_grid",
"output_type":"min",
"output_type":"max",
"output_type":"mean",
"output_type":"idw",
"output_type":"den",
"output_format":"asc",
}
]
}
Options¶
- grid_dist_x
- Size of grid cell in x dimension [Default: 6]
- grid_dist_y
- Size of grid cell in y dimension. [Default: 6]
- radius
- ??? [Default: 8.48528]
- filename
- Base file name for output files. [Required]
- output_type
- One or many options, specifying “min”, “max”, “mean”, “idw” (inverse distance weighted), “den” (density), or “all” to get all variants with just one option. [Default: all]
- output_format
- File output format to use, one of “grid”, “tif”, or “asc”. [Default: grid]
- z
- Name of the ‘z’ dimension to use. [Default: ‘Z’]
- bounds
- Custom bounds for output raster(s). If not provided, bounds will be calculated from the bounds of the input data. [Default: none]