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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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