These instructions apply to Autodesk® Civil 3D® 2013 and newer, and screen shots are of Civil 3D 2020. They describe how to import georeferenced Nearmap imagery that you've exported with the Export Imagery tool in the Nearmap MapBrowser.

Please note that only certain versions of Autodesk support GIS functionality. Standard AutoCAD allow import of georeferenced imagery via the Raster Design Plugin.

NOTE

Autodesk will not detect the .jgw georeferencing file if the file path is greater than 128 characters. We recommend you rename your .jpg and .jgw files after downloading your imagery. Make sure they have exactly the same name.

These instructions assume that you have already followed the process described in our documentation on exporting imagery, and as a result have downloaded a Nearmap image with an accompanying .jgw file to your computer.

In addition to this document, you can watch our video. Note that the video uses Autodesk Civil 3D 2018.

.

Step 1 - Prepare Your Files

  1. Go to the location to which you downloaded the Nearmap image export.

  2. You should find a zip file containing a Nearmap image and .jgw file with similar filenames. If you only have an image, and not a zip file, follow the instructions in our document on exporting imagery and ensure that you select the option to download a georeference file with your image.

  3. Unzip the Nearmap download. You should have a .jpg and a .jgw file.

Step 2 - Set up a Coordinate System

Before loading Nearmap georeferenced imagery, set up a coordinate system.

  1. In the Civil 3D Workspace view, from the Toolspace menu, click the Settings tab.



  2. Right-click on the drawing name and select Edit Drawing Settings.



  3. If you want to take measurements from Nearmap imagery, select a distance-based coordinate system - for example, UTM zones or local grid systems. Please refer to Natively Supported Coordinate Systems.

          

  4. Click Apply, then OK.

Step 3 - Import the image

  1. Enter command MAPCONNECT.



  2. In the Data Connections by Provider window, click Add Raster Image or Surface Connection.



  3. Click the image button and locate the Nearmap jpg imagery. Press Open.
        

  4. Press Connect.


  5. Press Add to Map.


  6. Locate the .jgw world file that was zipped in the download with the jpg file. Right-click it and select Open.


  7. The .jgw file you exported from MapBrowser gives you the X and Y coordinates of the top left centre of the pixel of the image. Autodesk Civil 3D requires the coordinates of for the bottom left corner of the image.


  8. Calculate:

    X at the bottom left corner of the image = Line 5 - ( 0.5 * Line 1) =  368118.953753 - ( 0.5 * 0.298582) = 368118.804462

    and paste it into insertion point x in the open dialog.



  9. Calculate the y translation by following the details in the table below:

    formulay coordinate

    +

    pixel size in y direction

    x

    number of pixels in height minus half a pixel
    where to get the valuey coordinate - line 6 from the .jgw file
    pixel size in y direction - line 4 from the .jgw file

    number of pixels in height can be found by right clicking the image file on your local drive. Go to Property and then the Details tab.

    example/screen shot




    X at the bottom left corner of the image =  8128897.069918 + ( 3290.5 * -0.298582) = 8127914.789858

  10. Enter the result into insertion point y.


  11. Click OK.

The image layer loads and displays.

Note: If the map does not appear to be loaded correctly, it may be that the coordinate system for the drawing is not set to the one downloaded. In that case, just reassign appropriately.




Configuring Measurements

If you would like to take measurements with Nearmap imagery, follow these additional steps:

  1. In the command box at the bottom of the screen, type "UN" and press Enter. The Drawing Units box appears - use this window to set appropriate measurement units.



  2. At the command box, enter "MEA" and select the MeasureGeom tool with an appropriate option. You can now take measurements using Nearmap imagery. The measurements will be shown on screen.