For an upcoming project I was curious about visualizing a line layer using OpenLayers. Therefore I digitized a way with googlemaps. After creating a kml with “my places” in googlemaps I exported the coordinates to libre office calc and converted them to fit the needed code in OpenLayers:
In the last tutorial we have created a very basic web-map using OpenLayers and one web-mapping service from OpenLayers itself. In fact using OpenLayers seems to me like consuming WMS layers and combine them to a new map. In the next example I would like to show you, how to add a second layer which contains some labels of interest.
The term GIS is very closely associated with the layer concept, as a standard GIS will allow you to work in various levels and their proper representation. When you talk about GIS, you will might need to visualize this layer principle. Here is a template for such a visualization you can use under the CC license: