How to Specify a Grid

A grid is defined by specifying values for the following statements taken from the Gridlines.txt file which is located in the style Config directory as mentioned in Grid Lines .

Example: GRID floor_A

GRID  <name>
GRID starts the definition of a new grid (keyword)
<name>              the name of the grid

Example: ACS 0 0 0 20

ACS <origin>  <angle>
ACS specifies the local coordinate system for a grid (keyword)
• <origin>         specifies the origin of the ACS
• <angle>          specifies the counter-clockwise angle of the north direction relative to the global north

Example: LINE A N 0 0 0 20000

LINE <name> <dir> <start point> <length>
LINE specifies a single grid line in the grid (keyword)
• <name>           the name of the grid line
• <dir>            the nominal direction of the grid line, either N or E
• <start point>    start point of the grid line
• <length>         the length of the grid line

Example: LINESET A N 0 0 0 20000 11 2000

LINESET <name> <dir> <start point> <length> <cnt> <offset>
LINESET specifies a set of equidistant grid lines in the grid (keyword)
• <name>           the name of the grid line. Note that for a LINESET the first letter is used to detect if it is a digit. If so line names start from 1 otherwise line names start from A
• <dir>            the nominal direction of the grid line, either N or E
• <start point>    start point of the grid line
• <length>         the length of the grid line
• <cnt>            the number of grid lines wanted
• <offset>         the distance between the grid lines. When lines are running in North the offset value is in East direction, when lines are running in East the offset value is in North direction

Note: Multiple LINESET and LINE statements can be used to define a single grid.

Example 1

A sample grid named "Floor_A" is shown below. It consists of 3 gridlines in North/South direction named A, B, C and 6 lines in East/West named 1 to 6. The local coordinate system can be located anywhere in- or outside the grid, here it is located in the left lower corner of the grid. The North/south grid lines are 10000 apart, the East/West lines are 2000 apart. The red dot is a location point and mentioned are the coordinates in the global plant coordinates system (WCS) , the local grid coordinate system (ACS) an a column reference dimension.

The specification lines are given in the picture. The text specification for this grid would be as follows:

GRID Floor_A
  # the local coordinate system is offset (20000, 10000, 0) for the global origin and has zero rotation
  ACS  20000  10000  0  0
  # Lines running North/South. The first line starts in (0,0,0) relative to the ACS and run 10000 units 
  # in NORTH direction
  # the other 2 lines are offset 10000 from this line in East direction
  LINESET  A  N  0  0  0  10000  3  10000
  # Lines running East/West. The first line starts in (0,0,0) relative to the ACS and run 20000 units 
  # in EAST direction
  # the other 5 lines are offset 2000 from this line in North direction
  LINESET  1  E  0  0  0  20000  6  2000

Example 2

The grid definition is basically the same as in Example #1 but rotated 5 degrees counter-clockwise.

The text definition is the same as in Example 1 except for the ACS line. (Note the last column has a value of 5 which represents a 5 degree counter-clockwise rotation.)

GRID Floor_A
  ACS  20000  10000  0  5
  LINESET  A  N  0  0  0  10000  3  10000
  LINESET  1  E  0  0  0  20000  6  2000