Easy Tip! Zoom Layering Techniques for managing the detail in your maps
|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.
Above: The Layer Properties button as found in the 32 bit versions of MapInfo pro. Map data is StreetPro Italy (c) 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. Let's say you have a layer of cities and towns which are represented as points. If you zoom in to a very small area, perhaps 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.
Want to learn more?
It is possible to streamline your layer control a bit with multiple style overrides for the same layer. Look for an article in the "Something a bit more Advanced" topic called "Streamline Layer Control with multiple style overrides".
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/or the Add a Label Override settings.
Article by Tom Probert, Editor of "The MapInfo Pro" journal
When not writing articles for "The MapInfo Pro", Tom enjoys talking to MapInfo Pro users at conferences and events. When not working he likes to see movies with car chases, explosions and kung-fu fighting.