Easy Tip! Zoom Layering Techniques
| ||What is zoom layering? |
Zoom Layering allows you to control the visibility of each layer based on whether it is relevant for the current map window zoom. For example a detailed streets layer is best used when you are zoomed in close on the map. A generalised (i.e. not detailed or low resolution) boundary layer is best used when you are zoomed out.
Determining the Zoom Layering settings
Here are quick tips for knowing if Zoom Layering has been applied to a Layer and what these settings are.
Setting the Zoom Layering
To set the Zoom Layering you need to access the Layer Properties dialog box. Here are two ways to do this. In Layer control either (1) Select the Layer and click the Layer Properties button or (2) double click the layer name.
Map data is StreetPro Italy (c) 2012 TomTom BV
The Zoom Layering controls
See the screen shot below. The minimum zoom can be used to prevent layers from being displayed because they are too general. The city layer below is a good example. Letâs say you have a layer of cities and towns which are represented as points. If you zoom in to a very small area, letâs say a few hundred metres, then the whole area of your map represents the city. When zoomed in this close it no longer makes sense to display a point to represent the city.
You can work with multiple layers at once!
If you need to change the Zoom Layering (or other Layer Control settings) it is possible to select multiple layers and change them all at once.
I hope you found this article useful. Next month we will extend this topic in the "Something a bit more advanced" section and discuss how to easily apply multiple zoom layering and label settings for a map. If you want to venture on your own and explore this now, right click on a layer and check out the Add a Display Override and Add a Label Override settings.
Download MapInfo Professional v11.5
The screen shots and instructions for this article were done using the Layer Control capabilities first introduced in MI Pro v10.0. Zoom Layering is present in earlier versions of the software. If you are using an older version of MapInfo Professional and want to see how much Layer Control has improved you can download a free trial of MapInfo Professional v11.5.
Article by Tom Probert, Editor of "The MapInfo Professional" journal
When not writing articles for "The MapInfo Professional", Tom enjoys talking to MapInfo Professional users at conferences and events. When not working he likes to see movies with car chases, explosions and kung-fu fighting.