Autor: Christoph Graf

Patrouilles des Glaciers: Track Replay

Comparing Positions with Time Lag As blogged earlier I spent a week at the race office of the Patrouille des Glaciers (PdG). During the race, each PdG team of three athletes was equipped with a GPS device that kept broadcasting its position to the race office. Furthermore this device was equipped with an emergency button able to send a distress message along with its current position to the race office. We wanted to know whether...

Time keeping at the Patrouille des Glaciers – a look behind the scenes

The Patrouille des Glaciers (PdG) is an international ski mountaineering race organised by the Swiss Armed Forces in which military and civilian teams compete. It is said to be the world’s toughest team competition. The very long race distance, the extreme route profile, the high altitude and the difficult alpine terrain with glaciers and couloir climbs are the main features of this unique competition. As announced in November 2015 Ernst Basler + Partner is teaming...

Does Web Mercator imply erroneous geospatial positioning?

Web Mercator nowadays is probably the most frequently used map projection. Don’t worry if you have never heard about it though. This new projection is used by Google Maps, Bing Maps by Microsoft, ArcGIS Online by Esri and the OpenLayers community. It became the standard of displaying geographic data on the web. There are rumours that this standard is bad because it implies tremendous geospatial positioning errors. The Office of Geomatics at the U.S. National...

Rückblick auf Esri Partner Conference und Developer Summit 2014

(An English version of this text can be found here) Ralph Straumann und ich haben vom 9. bis 13. März 2014 in Palm Springs die Esri Partner Conference sowie den Esri Developer Summit besucht. In diesem Beitrag berichten wir über die Trends, die wir vor allem an der Partner Conference identifiziert haben, und ordnen diese in einen grösseren Rahmen ein. Zuerst lässt sich feststellen, dass es dieses Jahr nicht ein bestimmtes Schlagwort gab, das die ganze Konferenz durchzogen hat –...