Creating a Terrain or Roughness Map based on Polygon

If no map file is provided by customer or post-assessment team, or the terrain information in the map file is incomplete, you can create a terrain or roughness map file based on the polygon you draw.

  1. Draw a polygon and save it in the project. Refer to the section Drawing a Polygon for details.
  2. Click the project name in the project pane and click the data download icon in the toolbar menu. The Data download pane opens.
  3. Click the Existing Region radio button.
  4. Select a polygon in the Choose drop down menu.
  5. Select terrain, roughness, topography, road network, or wind resource map from the Type drop-down menu, and select the data source and interval correspondingly.
    Download Content Data Source Option
    Terrain SRTM and Greenwich. The recommended option is Greenwich, which is the map set generated by Greenwich machine learning. Data source and interval of contour line
    Roughness GlobCover2009 and LandCover. The source of these two options are the public data of institutes. Roughness origin
    Topography Terrain information is acquired from the SRTM or Greenwich data set, and the roughness information is from GlobCover2009 and LandCover. Data source, interval of contour line, and roughness origin
    Road newtwork Greenwich road network data library. Road level
    Wind resource map Greenwich wind resource data library. The upper limit of the exterior rectangle area of the downloaded wind resource map is 2000 km2. Wind resource map (height)
    Note: The options introduced in this section is only related to map creation.
  6. Click the Download button, a map object is created in the project named as Map1. At the same time, the corresponding map file is downloaded in the default download directory of your browser.
    The boundary of the polygon is expanded by 6 km as the border of the map.
  7. (Optional) To modify the map name, click the map object in the project pane and click the expand icon 《 to open the operation pane.
  8. Edit the name in the Property pane.
  9. Click OK at the top to save the change.

    The operations introduced in this section are applicable for scopes in any shape. To download map, you can select the Drawn Region radio button in the Data download pane, input the longitude, latitude, and radius to define a square scope, and select the content type to be downloaded.