Drawing Methods

The following methods create SIS graphics.

In many cases it will be easier and more efficient to use the CreateItem method with an Open Geospatial Consortium (OGC) Well-Known-Text string, rather than a stream of MoveTo/LineTo.


BezierTo   Draws a Bezier curve from the current drawing position.
BulgeTo   Draws an arc from the current drawing position.
CleanLines   Cleans up LineString items, removing repeated vertices etc.
CreateAreaFromLines   Creates a Polygon, or Polygons, from the LineString items in a named list.
CreateAspectGrid   Creates an 'aspect' Grid from the currently open TIN as angles measured from North.
CreateAssembly   Creates an Assembly item from the items in a named list.
CreateBitmap   Creates a Bitmap item.
CreateBlock   Creates a named Block from the items in a named list.
CreateBoundary   Creates an item from the boundary of the current open item.
CreateBoxLabel   Creates a special BoxLabel text item, with a line pointing to a labelled location.
CreateBoxText   Creates a BoxText item.
CreateCircle   Creates a circular Polygon item.
CreateConvexHull   Creates the smallest possible item with convex geometry that contains the current open item.
CreateEllipse   Creates an elliptical Polygon item.
CreateExtrusion   Creates a Surface item by extruding the current open Polygon or LineString item.
CreateFormulaGrid   Creates a Grid item by combining named Grid items using an expression.
CreateGeodeticBuffer   Creates a 'geodetic' buffer around items in a named list.
CreateGradientGrid   Creates a 'slope' Grid from the currently open TIN as gradients between 0 and 100%
CreateGraticule   Creates a Graticule item using the current open Map Frame item.
CreateGreatCircleLine   Creates a Great Circle line.
CreateGridFromQZone   Creates a Grid item from the current open QZone item.
CreateHotSpotGrid Creates a Hot Spot Grid item from the origins of the items in a named list.
CreateInsert   Creates an insertion of a Block item.
CreateLineText   Creates a LineText item using the current open LineString item.
CreateNorthPoint   Creates a North Point item using the current open Map Frame item.
CreatePhoto   Creates a Map Frame item in the current window, filling it with the composed window.
CreatePhotoEx Creates a Map Frame item in the current session, filling it with the specified named composition.
CreatePoint   Creates a Point item.
CreateQZoneFromGrid   Creates a QZone item from the cells in the current open Grid item that are between two values.
CreateRectangle   Creates a rectangular Polygon item.
CreateScatterGrid   Creates a Grid item from the hook points of the items in a named list.
CreateSlopeGrid   Creates a 'slope' Grid from the currently open TIN as angles between 0 and 90 degrees.
CreateSurface   Creates a Surface item from the current open Polygon item.
CreateText   Creates a point Text item.
CreateThiessen   Creates Thiessen Polygon items from the hook points of the items in a named list.
CreateTin   Creates a TIN from the hook points of the items in a named list.
CreateTinEx Creates a TIN from the hook points of the items in a named list, using advanced creation properties.
CreateTinFromGrid Fits a TIN item over the current open Grid item.
CreateViewshed   Calculates a 'viewshed' over Grid Items.
DecomposeGeometry   Breaks down the currently open item with complex geometry, so the disconnected pieces form separate items.
DecomposeGrid 'Explodes' the current open Grid item into one Polygon item per Grid cell.
DeleteGeomPt Deletes a vertex from the geometry of a currently open item.
ExplodeShape Converts Point items with symbols into editable items.
FacetGeometry Replaces curved geometry segments with shorter straight segments.
FillGeometry Fills the space that is enclosed by the geometry of the current open item.
GeneraliseDP   Generalises geometry using the Douglas-Peucker algorithm.
InsertGeomPt   Inserts a new vertex into geometry from the current open item.
IsGeomClockwise Test if the geometry of the current open item is clockwise.
IsGeomClosed Test if the geometry of the current open item is closed.
JoinLines   Joins LineString items within a tolerance.
LineTo   Draws a LineString item from the current drawing position.
MoveTo   Sets the current drawing position.
PasteFrom   Pastes a file into the current SWD.
SetGeomPt   Sets the position of a vertex in geometry from the current open item.
SetGeomSegBulge   Sets the bulge of a segment in geometry from the current open item.
SetGridItemValue   Sets the value in a cell of the current open Grid item.
SetWatermark Sets the watermark image used for renders of this SIS Workspace Definition (SWD) in GeognoSIS.
SliceGeometry   Slices through items in a list cutting them into pieces.
Snap   Inserts a position into the current callback command
SnipGeometry   Snips away portions of the items inside or outside the current item.
SnipTin Snips out the part of the current open TIN that does not overlap the given Polygon item.
SubdivideTin Subdivides the current open TIN item's faces using smooth interpolation.
StoreAsArea   Stores the previous MoveTo/LineTo operations as a Polygon item.
StoreAsLine   Stores the previous MoveTo/LineTo operations as a LineString item.
TraceGeom   Creates a LineString item by tracing geometry from the current open item.

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