Combine OS MasterMap®with contours in AutoCAD Map 3D

Please see the Digimap data in CAD page for details of overlaying other datasets in Autodesk software.

AutoCAD Map 3D instructions

Combine OS MasterMap® Topography Layer with OS Terrain™ 50 Contours in AutoCAD Map 3D.

Get the data

It is assumed that you have already downloaded:

• OS MasterMap® Topography Layer in DWG format and
• OS Terrain™ 50 contours in Shapefile format for the same area from the Ordnance Survey download data service in Digimap.
• The data should be unzipped and stored in a suitable local or network location.

Open files in AutoCAD Map 3D

1) Open the OS MasterMap® Topography Layer DWG file in AutoCAD Map 3D. At the Open Foreign DWG File window click Continue opening DWG file.

2) The downloaded data will be displayed:

3) To overlay the OS Terrain™ 50 contours on top select Data then Connect to Data from the Task Pane:

4) Select Add SHP Connection as the connection type. 5) Give your connection a suitable name (e.g. Terrain 50 Contours) and browse to the OS Terrain™ 50 contours line Shapefile downloaded from Digimap:

5) Select Connect to establish the data connection.

6) Click on the Add to Map button: to add the contours to the map:

7) The contours will be displayed on top of OS MasterMap® Topography Layer.

Controlling which layers are displayed

If you find that the map is too cluttered you can turn off layers using the Layer Control tool in AutoCAD Map 3D.

1. On the Home menu, click on the light bulb to open up the Layer Control.
2. Click on the light bulb to turn off individual layers.

AutoCAD instructions

Combine OS MasterMap® Topography Layer with Terrain 5 Contours in AutoCAD.

Get the data

It is assumed that you have already downloaded:

• OS MasterMap® Topography Layer in DWG format,
• OS Terrain 50 contours in DWG format for the same area from the Ordnance Survey Download Data service in Digimap.

The data should be unzipped and stored in a suitable local or network location.

Open the files

1) Open AutoCAD.

2) Open the OS Terrain 5 contours dataset using the Open Drawing dialog.

3) Press Open then on the Navigation Bar select the Zoom Extents button.

Display OS Terrain 50 contours on top of OS MasterMap® Topography Layer

1) Open the OS MasterMap® Topography Layer DWG file in AutoCAD. At the Open - Foreign DWG File window click Continue opening DWG file:

2) On the Navigation Bar select the Zoom Extents button. The downloaded data will be displayed:

3) To attach the contours dataset go to the Insert tab and click on the Attach button in the Reference section:

4) At the Select Reference File dialog ensure the Files of type drop down is set to Drawing (*.dwg).

5) The Attach External Reference dialog will be shown, leave the dialog as it is:

• Note Locate using Geographic Data is greyed out and cannot be selected/deselected. This is because both datasets contain geographic location information so AutoCAD will place the datasets in the correct position.

6) The contours dataset will be displayed on top of the OS MasterMap® Topography Layer data:

Customising the map to turn off features that are not required

• By default all of the information held in the Contours drawing will be shown including information at the edges of each contour tile which will obscure the OS MasterMap® Topography Layer data below it.
• Individual layers are controlled using the dropdown in the Layers section of the Home tab:

To turn layers off expand the layers dropdown and then click on the lightbulb icon beside the layer(s) you wish to turn off:

Saving your drawing

• Having customised the drawing it is a good idea to save it through the Save As menu.

• Remember to save your file as type: AutoCAD 2013 Drawing (*.dwg).