Survey File Examples

In Insight, a survey refers to the navigational positioning of a dataset (the IL/CL or Line/CMP to X/Y relationship). Data is stored in Volumes. See Survey Overview for more details.

In most cases, surveys are created when loading data into Insight from SEG-Y (see Defining a Survey (3D SEG-Y)), navigation data, or over the data links. Survey geometry can be also specified in text files and imported into Insight.

By default, Insight expects the extension ".survey". The format varies between 2D and 3D surveys.

Note: Lines or sections with the # character are comments and will not be read or processed.

3D Survey Example

survey_type=3D
survey_name=Example3D

# survey master grid. inline and crossline extents. Note these can't have increments.
survey=il:501-2501+cl:2501-4501

# tie points: inline/crossline, UTM-X/UTM-Y
survey_pt1_IL_CL_X_Y=1001.000000/3001.000000,500000.000000/6000000.000000
survey_pt2_IL_CL_X_Y=1001.000000/4001.000000,500000.000000/6005000.000000
survey_pt3_IL_CL_X_Y=2001.000000/4001.000000,510000.000000/6005000.000000
  1. survey_type must be "3D".
  2. survey_name should be a useful label.
  3. survey=il:[range]+cl:[range]
    • Defines the initial inline and crossline extents when displaying the survey
    • Do not specify an increment
  4. survey_pt1_IL_CL_X_Y, survey_pt2_IL_CL_X_Y, and survey_pt3_IL_CL_X_Y.
    • Three tie points must be specified
    • The value of each point must be: IL/CL, X/Y
    • The survey will be generatd from the relationship defined by the three points
    • The points must not be co-linear, but can otherwise be from anywhere in the survey

2D Survey Example

# Survey grid
survey_type=2D
survey_name=Example2D

### Line  2d-001 ###
line_name=2d-001
line=cmp:1-412
line_CMP_X_Y=1,497230.769231/6006884.615384
line_CMP_X_Y=412,503341.590521/5998624.258966

### Line  2d-002 ###
line_name=2d-002
line=cmp:1-412
line_CMP_X_Y=1,496892.307692/6006653.846154
line_CMP_X_Y=412,503003.128983/5998393.489736

### Line  2d-003 ###
line_name=2d-003
line=cmp:1-412
line_CMP_X_Y=1,496430.769231/6006330.769231
line_CMP_X_Y=412,502541.590521/5998070.412813

### Line  2d-004 ###
line_name=2d-004
line=cmp:1-353
line_CMP_X_Y=1,500430.769231/6006776.923077
line_CMP_X_Y=353,495946.192245/5999205.359879

### Line  2d-005 ###
line_name=2d-005
line=cmp:1-278
line_CMP_X_Y=1,502446.153846/6005346.153846
line_CMP_X_Y=278,498237.281563/5999846.970352
  1. survey_type must be "2D".
  2. survey_name should be a useful label.
  3. line_name= 2D line name
    • The 2D line name, unique to this survey
  4. line=cmp:[range]
    • Defines the valid cmp range for a line
    • Do not specify an increment
  5. line_CMP_X_Y (2D CMP-XY point)
    • Each line must have at least two CMP-XY points (start and end)
    • The value of each point must be CMP, X/Y
    • Locations between CMP corner points are interpolated