R Statistical Raster Data (GRD) Quick Facts

Format Type Identifier

RRASTER

Reader/Writer

Both

Dependencies

None

Dataset Type

Reader: File

Writer: Folder

Feature Type

RRASTER or <source_dataset_filename>

Typical File Extensions

.grd

Automated Translation Support

Yes

User-Defined Attributes

No

Coordinate System Support

Yes

Generic Color Support

No

Spatial Index

No

Schema Required

No

Transaction Support

No

Encoding Support

Yes – the header supports unicode values.

Geometry Type

rraster_type

RRASTER Geometry Support

Geometry

Supported?

aggregate

no

circles

no

circular arc

no

donut polygon

no

elliptical arc

no

ellipses

no

line

no

none

no

point

no

polygon

no

raster

yes

solid

no

surface

no

text

no

z values

no

Raster Support

Band Interpretations

INT8, INT16, INT32, INT64, UINT8, UINT16, REAL32, REAL64

One type must be applied to all bands

Palette Key Interpretations

UInt8, UInt16

Palette Value Interpretations

RGB24, RGB48, RGBA32, RGBA64, STRING

Nodata Value

Any, but all bands on a raster must have the same value.

R rasterfile package default based on band data type:

  • Unsigned: highest possible value
  • Signed: lowest possible value

Rotation Support

No

GCP Support

No

World File Support

No

TAB File Support

No