Viewshed Analysis tool settings

Setting Description
Area Defines the area to be processed. An STM is very large and in many cases areas away from the selected viewpoint do not need to be processed. Use the selection tool to identify the appropriate area or select the element or view. Select from:
  • Block
  • Oriented Block
  • Element
  • Shape
  • View
KEY-IN: STM VIEWSHEDANALYSISDLG DEFINEAREA < BLOCK > < ORIBLOCK > < ELEMENT > < SHAPE > < FENCE > < VIEW >
View Position Describes the viewers's position.
KEY-IN: STM VIEWSHEDANALYSISDLG IDENTIFYVEWERPOS
Method Either a static point or a path.
KEY-IN: STM VIEWSHEDANALYSISDLG IDENTIFYVEWERPATH
Position Active if Static position is selected. KEY-IN the X, Y and Z values or use the selection tool to define.
Increment Specifies the increment distance along the path in which to calculate results. A smaller increment will increase processing time.
Elevation Specifies the elevation to use:
  • The specified point or element - Uses the elevation as defined by the point or selected path element .
  • STM elevation - The height of the STM at that point.
  • Height above STM - The specified height above the STM.
  • User defined elevation - A user defined elevation. Only the X and Y values of the point or path are used for location with the elevation value determined by this parameter.
Pixel Size The size of the output pixel in the resulting grid file. Smaller values increase processing time.
Measuring tool Use to measure the pixel size.
KEY-IN: STM MEASURER
Grid File Name The name of the resulting grid file.
Run Starts the viewshed analysis process.
KEY-IN: STM VIEWSHEDANALYSISDLG RUN