Positioning performance evaluation of a dual frequency multi-GNSS smartphone
Till Weigert And Guenther Retscher
In this study, it is analysed if simple tasks of applied surveying, GIS data acquisition or in LBS can be performed with smartphones. Their usage saves time and cost, since no additional hardware has to be purchased, such as PDAs or dedicated GIS receivers.... [more]

Use only horizontal ground distance [not grid distance] dimensions in land surveys
John Read
In Australia, all land dimensions are only horizontal ground distances and all surveying and mapping coordinates are only on 60 UTM projection. Comparatively simple and unconfused, this Australian coordination practice has proven itself over the last 50 years and can claim to be the best survey coordination and mapping system in the world ... [more]

Animal navigation: How animals use environmental factors to find their way
Roswitha Wiltschko and Wolfgang Wiltschko
Migratory animals have innate programs to guide them to their still unknown goal. Highly mobile animals with large ranges develop a so-called navigational ‘map’, a mental representation of the spatial distribution of navigational factors within their home region and their migration route. Readers may recall that the first part was published in November issue. We present here the concluding part... [more]