Tag Archives: Background Maps

Multi-directional Hillshading

A hillshade is a shaded relief picture of the surface. Important for a hillshade is the position of the imaginary light source, which is taken into account for shading the image.

Normally, the direction of the light source is 315° (north-west). Since the Service Update 20.5.3, it’s also possible to choose the option Multi-directional. It is a composite image made up of four images in which the light source comes from different directions. Like this, the terrain is more realistically represented, and overexposed and nonilluminated areas of the map are more balanced.

In OCAD, Hill Shading can be created from the DEM menu or from the DEM Import Wizard.

Load Georeferenced Google Maps Aerial Images

Would you like to quickly and easily load a georeferenced aerial image as background map?

Then this is best done with the function Online Map Services. The function loads a Google Maps image directly at the right place.

This is how easy it works (Video you YouTube):

– Open the Online Map Services in the OCAD Background Map menu.
– Move and zoom in Google Maps to the desired extent.
– Load the image correctly geo-referenced as background map.

If the map is not geo-referenced, you need to adjust the Background Map afterwards.

Download Georeferenced Satellite Images

SAS.Planet is a free application used to view and download satellite images submitted by such services as Google Maps, Bing Maps, Yandex.maps, Yahoo! Maps and many more.

The satellite images can be downloaded and then loaded into OCAD as georeferenced background maps.

We can recommend the following workaround:

1. Download SAS.Planet from the web and run the application.

2. Zoom to your desired location and select an extend.

3. Open the Selection Manager and edit the tab Stitch. Don’t forget to create a file for georeferencing. We’ve chosen the settings as follows.

4. Start the download.

5. Open a map project in OCAD. Your map needs to be georeferenced. To georeference a new map, you can use the New Map Wizard.

6. Go to Menu Background>Manage>Open.

7. Choose your downloaded satellite images. As they most probably do not have the same coordinate system as your map project, you need to transform the satellite images. Choose Google Mercator as coordinate system.

8. Click OK and the satellite images appear as georeferenced background maps.