Export Formats (Horizon)

Horizons can be exported in the default Insight text, Insight multi-survey or the customised text format.

Note: For a full list of Horizon file formats accepted by Insight, see Formats accepted by Insight for import and export.

X/Y horizon

For horizons in the X/Y coordinate space, you can export horizon in the default Insight format (.xyt/.xyz/.xya) or customised format (.dat). In Insight format, the text file consists of three columns. Each line is based on the following format:

  • .xy = Easting/Northing
  • .xyt = Easting/Northing/TWT
  • .xyz = Easting/Northing/TVDSS
  • .xya = Easting/Northing/Attribute (e.g. Amplitude)

Comment lines begin with a hash (#) character. For example:

# subgrid=UTMX:621000-629760[60]+UTMY:6178450-6188950[25]
# vertical_dimension=TWT
# vertical_unit=ms
    621060    6180325    2419.05
    621060    6180350    2418.56
    621060    6180375    2418.05
    621060    6180400    2417.5
    621060    6180425    2416.89

Note: The comments defining the grid, vertical dimension and its unit above the columns are not required.

IL/CL horizon

Similar to X/Y horizons, you can export a horizon in the IL/CL coordinate space using the default Insight format or customised format. For export in Insight format, each line is based on the following format:

  • .ilcl = Inline/Crossline
  • .ilclt = Inline/Crossline/Time
  • .ilclz = Inline/Crossline/Depth

Comment lines begin with a hash (#) character. For example:

# subgrid=il:1272-3492[10]+cl:1320-3520[10]
# vertical_dimension=time
    1272     1320   3005.008
    1272     1330   3005.050
    1272     1340   3005.117
    1272     1350   3005.179
    1272     1360   3005.238
    1272     1370   3005.294
    1272     1380   3005.378
    1272     1390   3011.869

Note: The comments defining the grid and vertical dimension above the columns are not required.

Meanwhile for all the types of horizons, custom export allows you to choose any combination of location (IL, CL, X, Y, CMP, Offset, as appropriate) and amplitude columns, in any order, for export.

Multi-survey horizon

For a horizon that is picked across multiple horizons, you can export it to the Insight multi-survey format (.dugmsh). This is the default format for exporting 2D and multi-survey horizons. See the following for an example of a multi-horizon file in the .dugmsh format:

multi-survey-horizon version 1.0
name MultiSurvey_Horizon
projectCRS
  name "Anguilla 1957 / British West Indies Grid"
  authority EPSG
  code 2000
vertical
  dimension time
  unit ms
survey
  type 3D
  name "South Australia 3D"
  uuid (3c7752d9-9bd9-427e-81ec-e51bb99ec6f5)
  inline
    sequence 1001-1700[1]
  crossline
    sequence 2027-6762[1]
  data
    1001 2554 2187.328
    1001 2555 2186.925
    1001 2556 2186.461
    1001 2557 2185.969
    1001 2558 2185.494
    1001 2560 2184.884
    1001 2561 2184.463
survey
  type 2D
  name "South Australia 2D"
  uuid (c0734c11-c75a-47c2-99ac-68c5f9eed1b8)
  line
    name W00FDW0023
    uuid (4159d552-5254-4e5d-bac4-970d354a396c)
    cmp
      sequence 6904-11190[1]
    data
      6904 1830.801
      6905 1830.851
      6906 1830.916
      6907 1830.833
      6908 1831.196
      6909 1831.271
      6910 1831.555