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Create Object Array |
  
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Create Object Array |
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The Create Object Array tool allows the user to easily create multiple model objects (e.g., source, buildings, receptors) with identical properties. After the model objects are created, the individual model object properties can be edited.
Starting the Create Object Array Tool
From the Tools menu, select the Create Object Array menu item. The following form will be displayed:
Options
Object type: Select the type of model object you want to create.
Configuration: Select the model object layout.
Cartesian grid - creates a Cartesian grid of model objects uniformly spaced in both the X and Y directions.
Polar grid - creates a polar grid of model objects uniformly spaced about a center point.
Polygon grid - creates a grid of model objects within a user defined polygon.
Polyline - creates an array of model objects along the perimeter of a user defined polyline. The polyline can be either open or closed.
Line - creates an array of model objects along a user defined line.
Variable density - creates an array of model objects with varying spacing within a user defined Cartesian grid.
Parameters
The Parameters group box lets the user define the locations of model objects. Different sets of parameters are required for different types of layout configurations.
Cartesian object array
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 Map view display of Cartesian object array of area sources |
For Cartesian grid layout, the following parameters are required to define the locations of the model objects.
SW X: X coordinate of the southwest corner (or the center) of the grid.
SW Y: Y coordinate of the southwest corner (or the center) of the grid.
X points: The number of objects on a horizontal line.
Y points: The number of object on a vertical line.
X spacing: The distance between two adjacent objects on a horizontal line.
Y spacing: The distance between two adjacent objects on a vertical line.
Polygon object array
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 Example of a polygon receptor object array |
X coord: X coordinate of every vertex of the polygon.
Y coord: Y coordinate of every vertex of the polygon.
X spacing: The distance between two adjacent objects on a horizontal line.
Y spacing: The distance between two adjacent objects on a vertical line.
Import Coordinates: Click to import coordinates of polygon vertices from a boundary line file (.bln) file.
Polar object array
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 Example of a polar receptor object array |
Center X: X coordinate of center of the polar grid.
Center Y: Y coordinate of center of the polar grid. .
Radials: The number of redials of the grid.
Rings: The number of the rings of the grid.
Ring spacing: The distance between two adjacent rings.
Polyline object array
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 Example of a polyline receptor object array |
X coord: X coordinate of every vertex of the polyline.
Y coord: Y coordinate of every vertex of the polyline.
Spacing: The desired distance between two adjacent model objects.
Corners >: The Corners parameter is used to define when objects will be placed at a point on a polyline, irrespective of the Spacing parameter. When the angle at a specific point on the polyline is at an angle greater than the Corner parameter, a model object will be placed at that point. The angle at each point is determined by the lines connecting the point to the preceding and succeeding points.
Import Coordinates: Click to import coordinates of polyline vertices from a boundary line file (.bln) file.
Line object array
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 Example of a line object array of volume sources |
X begin: X coordinate of the starting location of the line.
Y begin: Y coordinate of the starting location of the line.
X end: X coordinate of the starting location of the line.
Y end: Y coordinate of the ending location of the line.
Spacing: The desired distance between two adjacent model objects.
Variable density object array
This option is used to create model objects that are distributed in either Cartesian grid (square shape) or polar grid, with more than one spacing.
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 Example of a variable density |
Center X: X coordinate of center of the grid.
Center Y: Y coordinate of center of the grid.
Start: The distance between the center and the start point of the spacing that's defined in the same row.
End: The distance between the center and the end point of the spacing that's defined in the same row.
Spacing: The distance between the two adjacent model objects.
Object Parameters
Depending on the type of objects to be created, the user need to define the object properties for one of the following:
Sources - see the section on entering source parameters for more information.
Discrete receptors - see the section on entering receptor parameters for more information.
Buildings - see the section on entering building parameters for more information.
Page url: http://www.breeze-software.com/prod/aermod-isc/help/index.html?create_object_array.htm
