USING SCANNED  IMAGES  AS  LOCATION  MAPS

TopoCAD can use a scanned BitMap image as background information. In the case of orthogonal projection images (such as orthophotos), the scanned images can be Transformed into true position and scale in relation to the existing sheet data. This is done by means of an on-screen polynomial transformation, based on the identification of 3-5 defined co-ordinated points. Further data such as buildings, power lines, fences, contours etc. may then be digitized from the image and transferred to the sheet data base.

TopoCAD allows rapid Data Transfer to and from SURPAC drawings such as General Plans, Sectional Title Sheets, Diagrams and Working Plans. General Plan data may also be passed to TopoCAD to provide a Cadastral layer of data to add to general Topographical data etc. On the other hand, TopoCAD can be used to design a new township, or sub-division based, for example, on the normal contour and existing boundary restrictions. Design data may be  constructed such that road boundaries are parallel etc. On completion of the design (i.e. the Town Planning) stage, the Line, Point and Area data may be copied to General Plans, thereby eliminating the need for the Land Suryor to calculate the township from a design plan as is generally done at present.

TopoCAD allows for the drawing of Figures, Lines, Arcs, Circles, Text Items plus a variety of fixed and user defined symbols. Items maybe freely located or snapped to Points, existing Lines or to Grid Lines.

TopoCAD construction aids include Copy, Shift (Duplicate), Move, Enlarge, Decrease, Rotate, Remove which may be applied to Figures, Lines, Circles or Text Items. Other commands are, for example, Line Bisect, Line Trim, Data Search etc.