2D grid ASCII file format
OBJECT GRID2D Name
[CRS Authority Code Name HorizontalUnit]
[CSYSTEM Easting Norting TVDSS Inclination Azimuth]
[UNITS EastingUnit NorthingUnit VerticalUnit InclinationUnit AzimuthUnit]
[COLOR Red Green Blue [Alpha]]
[UNKNOWN UnknownValue]
[TYPE GeologicalType]
DIMENSIONS NumberNorth NumberEast StepNorth StepEast
CONSTANT ConstantValue
Keywords (the order of these keywords does not matter, except from the OBJECT keyword – this keyword should always be the first one – and that the TVDSS values are always at the end)
| Keyword | Description | Optional | Comment |
|---|---|---|---|
|
GRID2D |
Specifies the object type |
No |
One value is expected: 1. Name of the surface grid. |
|
TYPE |
Specifies the type of surface grid |
Yes |
One value is expected: 1. GeologicalType (Default = HORIZON) When this keyword is not included, the default type is applied. |
|
DIMENSIONS |
Specifies the surface grid dimensions |
No |
Four values are expected: 1. Number of cells in Easting direction 2. Number of cells in Northing direction 3. Cell size in Easting direction 4. Cell size in Northing direction |
|
CONSTANT |
Specifies a constant TVDSS value |
Yes |
One value is expected: 1. The constant depth value When this keyword is not found, a series of TVDSS values is expected. |
|
SOUTHNEIGHBORCONNECTED |
Specifies the south connection values |
Yes |
Default is false |
|
WESTNEIGHBORCONNECTED |
Specifies the west connection values |
Yes |
Default is false |
|
SOUTHEASTNEIGHBORCONNECTED |
Specifies the south east connection values |
Yes |
Default is false |
|
SOUTHWESTNEIGHBORCONNECTED |
Specifies the south west connection values |
Yes |
Default is false |
Variables
| Variable | Description | Type | Min | Max | Optional | Comment |
|---|---|---|---|---|---|---|
|
GeologicalType |
Type of geological surface |
Int |
0 |
4 |
Yes |
0 = UNDEFINED 1 = FAULT 2 = HORIZON 3 = UNCONFORMITY 4 = INTRUSION 5 = FLUID CONTACT 6 = PROPERTY 7 = FRACTURE 8 = BED BOUNDARY 9 = MICROSEISMIC 10 = MAP 11 = BOUNDARY 12 = FAULT POLYGON 13 = FAULT CENTERLINE 14 = LINE 15 = INFLECTION 16 = MESH BOUNDARY 17 = FLUID POLYGON |
|
NumberNorth |
Number of cells in northing direction |
Int |
1 |
>=1 |
No |
Minimum 1 cell |
|
NumberEast |
Number of cells in easting direction |
Int |
1 |
>=1 |
No |
Minimum 1 cell |
|
StepNorth |
Cell size in northing direction |
double |
>0 |
>0 |
No |
Size should be bigger than 0 |
|
StepEast |
Cell size in easting direction |
double |
>0 |
>0 |
No |
Size should be bigger than 0 |
|
ConstantValue |
Values to be used as constant depth |
double |
- |
- |
Yes |
Default = 0.0 |
|
TVDSS(index) |
TVDSS value at a cell corner |
double |
- |
- |
No |
TVDSS values are ordered from SW->NW to east. |
Example
OBJECT GRID2D Grid1
CSYSTEM 569000 168000 1600.0 0.0 0.0
UNITS m m m deg deg
COLOR 0 255 255 255
UNKNOWN -999.25
TYPE 2
DIMENSIONS 10 5 10 20
CONSTANT 100
10 20 30 40 50 60 70 80 90 100
10 20 30 40 50 60 70 80 90 100
10 20 30 40 50 60 70 80 90 100
10 20 30 40 50 60 70 80 90 100
click to enlarge