MapInfo (NGrid) Quick Facts

About Quick Facts Tables

Format Type Identifier

NGRID

Reader/Writer

Both

Licensing Level

Professional and above

Dependencies

None

Dataset Type

Reader: File, Writer: Folder

Feature Type

NGRID or <source_dataset_filename>

Typical File Extensions

Reading:

  • .grd
  • .grc

Writing:

  • .grd: rasters that do not contain a palette
  • .grc: rasters that contain a palette

Automated Translation Support

Yes

User-Defined Attributes

No

Coordinate System Support

Yes

Generic Color Support

No

Spatial Index

Never

Schema Required

Not applicable

Transaction Support

No

Encoding Support

No

Geometry Type

ngrid_type

 

Geometry Support

Geometry

Supported?

 

Geometry

Supported?

aggregate

no

 

point

no

circles

no

 

polygon

no

circular arc

no

 

raster

yes

donut polygon

no

 

solid

no

elliptical arc

no

 

surface

no

ellipses

no

 

text

no

line

no

 

z values

no

none

no

 

 

 

 

Band Interpretations

Real32

Palette Key Interpretations

UInt8, UInt16

Palette Value Interpretations

RGB24, String

Nodata Value

-2e37 for numeric bands

0 for paletted bands

Cell Origin (x, y)

0.5, 0.5

Rotation Support

No

GCP Support

No

World File Support

No

TAB File Support

Yes (but does not handle attribution)