In August i published a sample data set of river data generated from satellite data. Using this data i have now produced a web map demonstration of this sample area supplementing the rivers with a relief and land cover representation. The purpose of this demo is twofold: offering an easy way to inspect the river sample data and testing some techniques for map rendering, especially concerning labeling and relief visualization. I also assembled some explanations of the techniques and data used. Despite the various shortcomings mentioned there you are invited to compare this map to how well other maps cover this region (which is generally badly covered by most maps).