The Eschino d’Azé and the Cham des Bondons

Hiking distance : 16 km ; Hiking time : 05:00

On the western end of Mount Lozère a limestone plateau known as the “Cham des Bondons” bridges the space between Mont Lozère and the Sauveterre Causse. The Cham is interesting for a number of reasons.

Cham des Bondons landscape
Cham des Bondons landscape
    • The plateau is sprinkled with an estimated 150 prehistoric monolithic standing stones. Over time, many have been knocked over but many are also still standing or have been replaced upright in modern times. The meaning or purpose of the stones is unknown. Religious significance, waymarkers for travellers, burial markers… ? Christian prelates, however, considered these monoliths to be a symbol of paganism and so some were voluntarily knocked down to signify the dominance of the Christian faith. These monoliths are all granite and have therefore been quarried elsewhere – presumably on Mount Lozère – and transported to the Cham to be erected. The Cham has the largest accumulation of these monoliths in southern France. No one knows why prehistoric peoples would have gone to all the trouble so the monoliths represent a cultural heritage yet to be explained. To the best of my knowledge, however, there are no upright monoliths along this particular route.

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WordPress mapping plugins

Orux Maps altimetric profile vs theoreticalThis site, built with WordPress, uses a couple plug-ins for mapping. They are Leaflet Map and WP-GPX-maps.

Leaflet Map

Leaflet map allows you to display a track on a map background. The plug-in allows for use of OSM maps via MapQuest. To use MapQuest you need to sign up for an API key from their website, and for modest use like this website, the API key should be free. However, I opted not to use Mapquest. This is France and France has the IGN (Institut National de l’Information Géographique et Forestière). This institute publishes folding paper maps at many scales and the 1:25000 scale maps are outstanding for hikers. It seems that every department in the country has a hiking trail plan and these trails are all marked on the IGN maps. One point of warning though. The paper versions are sometimes out of date. Continue reading “WordPress mapping plugins”

A Cévennes panorama

Hiking distance : 20.5 km ; Hiking time : 06:00
la cabane
la cabane

This hiking trail starts from a spot in Saint-Sebastien d’Aigrefeuille about 9 km from Alès in the lower Cévennes. The starting location is not in the centre of the village, but on a side road near the Amous river at the bottom edge of the Carnoulès lead mine. We start with a pretty stroll upstream along the Amous river, which is flowing with clean water in February. The Amous river, downstream from the starting point flows through the famous Anduze Bamboo park (La Bambouseraie) in Générargues. The Amous then spills into the Gardon river about 2 km from Anduze. We’ll see later why this is of interest… Continue reading “A Cévennes panorama”

GPS trackers and altitude

All hikes start from the iron cross of Gattigues
Any attempt to get a good fix on cumulative climbing using GPS devices (handhelds, or smartphones) is fraught with error. Anyone who has used these GPS tracking devices knows that, while longitude and latitude are quite accurate, the altitude measurements at any given point vary from accurate to completely off the mark. GPS chip quality, embedded software and various external factors affect these readings. Walking at the base of a steep limestone cliff will cut out half of the sky and half of the satellite readings. Walking through a wet forest under wet leafy trees degrades the signals too. And there might be times when military services move the geopositioned satellites to serve a military purpose thereby degrading consumer level accuracy. So in this article, I compare a couple different apps to the Garmin GPSMap 64s to see if there are any conclusions. Continue reading “GPS trackers and altitude”