This tutorial outlines the process of preparing a 2D digital file for tool-pathing with FlowPATH for use with the school’s abrasive water-jet cutter. The water-jet is only capable of 2D cutting operations, and has extremely limited control of the depth of the cut so work should be designed with 2D lines and with the intention that the lines will be cut completely through the material – not etched. Depending on the hardness of the material it is possible to etch or score a cut instead of cutting all the way through, but this should only be done with ductile materials as it will cause shattering or breaking in more brittle materials.
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The content of data production in 3D city model is 3D Model Data (3DMD) including Digital Elevation Model (DEM), Digital Orthoimage Map (DOM) and objects (artificial and natural objects). DEM and DOM should be produced according to the traditional and mature criterion. 3D city model data production based on aerial remote sensing and 2DGIS should include three aspects: aerial survey 3D geometry model building, field texture collecting and building, terrain sight building and CAD model building for parts of objects.
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