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Cadastral mapping and Land Information System
Creation of Block maps /Ward maps
 In general the BLOCK MAP creation involves reading the FMB ladder plotted by the side of the BLOCK MAPS available with the Land Records. For this purpose the popular database format viz., MS EXCEL has been used. A small Visual Basic program allows the user to key-in the FMB ladder data in the same format as it is in the paper, so as to bring it into the CAD environment. Macros or small programs have been written to read this FMB ladder data in MS-Excel and to plot the same in MicroStation/J CAD environment. Options are available to set the symbol types for the station points etc. To join the points so plotted a variety of options are available to the user like:   Mouse method This allows the user to connect the required points by drawing a line between them, while at the same time placing the user defined dimension as well as the actual dimension of the line drawn. Two-Points method This allows the user to connect any two given points with the option to key-in the user defined dimension for the line drawn. Multi-Points method This method allows the user to connect a number of points plotted already in the order specified by the user. Options are also available to move, rotate or do other modifications to the dimensions or to the lines drawn. To plot the Traverse Boundary of the Block Maps, Ward Maps etc. the same MS-Excel format has been used with the option in MicroStation/J to read the selected Excel file containing the Traverse Co-ordinates. Mosaicing of Block Maps into its corresponding Ward Map has been made automatic in MicroStation/J environment using the Reference file concept. Creation Of Village FMB’s / Village Maps The process involved in the creation of Village FMB’s and Village Maps is very much similar to that of Block and Ward Map creation with the small difference that the Traverse Coordinates are not available and hence not used to plot the Traverse Boundary. The G-lines are used for this purpose and a process called as Triangulation plots them. For this purpose tools are available in the above said customised interface developed by PIXEL INFOTEK for the purpose of Land Records Department. After G-lines are plotted another program can be run to plot the FMB’s points from Excel file and also the corresponding ladder table also gets plotted. Mosaicing of Village FMB’s into the Village Map has been made automatic in MicroStation/J environment using the Reference file concept. |