{"id":4986,"date":"2026-01-20T07:57:53","date_gmt":"2026-01-20T07:57:53","guid":{"rendered":"https:\/\/help.cadomation.com\/spcad\/docs\/spcadhelp\/dem-tools\/"},"modified":"2026-03-12T08:44:44","modified_gmt":"2026-03-12T08:44:44","slug":"dem-tools","status":"publish","type":"docs","link":"https:\/\/help.cadomation.com\/spcad\/docs\/spcadhelp\/dem-tools\/","title":{"rendered":"DEM Tools"},"content":{"rendered":"\n

Overview<\/h1>\n\n\n\n

The DEM Tools<\/strong> in SPCAD group provides a specialized set of commands for processing and analyzing Digital Elevation Models (DEM)<\/strong> directly within SPCAD<\/strong>. Use these tools to fetch global elevation data, reproject spatial coordinates, generate vector contours from rasters, map hydrological networks, and perform advanced pathfinding analysis, all without leaving your CAD environment.<\/p>\n\n\n\n

What you can do with DEM Tools in SPCAD<\/strong><\/h2>\n\n\n\n
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  • Direct Elevation Access<\/strong>: Fetch high-quality global elevation data using the OpenTopography API.<\/li>\n\n\n\n
  • Coordinate Precision<\/strong>: Assign and manage coordinate systems within your DWG to ensure absolute spatial accuracy.<\/li>\n\n\n\n
  • Raster to Vector Conversion<\/strong>: Transform .tif elevation files into usable CAD contour lines.<\/li>\n\n\n\n
  • Hydrological Modeling<\/strong>: Automatically map drainage paths and identify watershed outlets.<\/li>\n\n\n\n
  • Site Planning Optimization<\/strong>: Use advanced pathfinding to determine the most efficient routes across a terrain.<\/li>\n<\/ul>\n\n\n\n

    Tools in this group<\/strong><\/h3>\n\n\n\n
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    • Download DEM<\/strong>
      <\/strong>Connects to the OpenTopography API<\/strong> to download high-resolution elevation data for your specific project area. This eliminates the need for external GIS software to acquire base terrain data.<\/li>\n\n\n\n
    • Reproject DEM<\/strong>
      <\/strong>Efficiently changes the coordinate system of a DEM file. Use this to ensure your elevation data aligns perfectly with your project\u2019s local or global coordinate requirements.<\/li>\n\n\n\n
    • Contours from DEM<\/strong>
      <\/strong>Processes raster .tif files to generate vector contour lines<\/strong>. This is a critical step for converting raw elevation data into manageable CAD geometry for grading and site design.<\/li>\n\n\n\n
    • Watershed Network<\/strong>
      <\/strong>Performs automated hydrological analysis to map drainage paths and watershed boundaries. Use this to identify natural water flow, drainage outlets, and potential flood zones using defined hydrology parameters.<\/li>\n\n\n\n
    • Least Cost Path<\/strong>
      <\/strong>Calculates the most efficient route between two points based on terrain slope and distance. This is a powerful tool for planning access roads, pipelines, or corridors with minimal environmental or construction impact.<\/li>\n<\/ul>\n\n\n\n

      Typical workflow<\/strong><\/h2>\n\n\n\n
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      1. Coordinate System Setup<\/strong>: Assign a coordinate system to your DWG to ensure all fetched data is spatially correct.<\/li>\n\n\n\n
      2. Download DEM<\/strong>: Fetch the required elevation data for your project boundary via OpenTopography.<\/li>\n\n\n\n
      3. Reproject DEM<\/strong>: If necessary, align the downloaded raster to your specific project coordinates.<\/li>\n\n\n\n
      4. Choose your analysis<\/strong>:\n
          \n
        • Contours from DEM<\/strong> for traditional topographic mapping.<\/li>\n\n\n\n
        • Watershed Network<\/strong> for drainage and environmental planning.<\/li>\n\n\n\n
        • Least Cost Path<\/strong> for optimized route and corridor planning.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n

          Notes and tips<\/strong><\/h3>\n\n\n\n
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          • Ensure your DWG has a defined coordinate system before downloading data to prevent alignment issues.<\/li>\n\n\n\n
          • When generating contours, adjusting the interval resolution can help balance drawing performance with the required level of detail.<\/li>\n\n\n\n
          • Use Watershed Network<\/strong> analysis early in the site planning phase to identify natural drainage constraints before starting heavy grading.<\/li>\n<\/ul>\n\n\n\n
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