Geomorphometry is the science of quantitative land-surface analysis (also known as the science of DIGITAL TERRAIN MODELLING AND ANALYSIS). It draws upon mathematical, statistical, and image-processing techniques to quantify the shape of earth's topography at various spatial scales. The focus of geomorphometry is calculation of surface-form measures (land-surface parameters) and features (objects), which may be used to improve the mapping and modeling of landforms, soils, vegetation, land use, natural hazards, and other information. With today's rapid growth in sources for mass-produced surface heights (digital elevation models, or DEMs), such as the Shuttle Radar Topographic Mission and laser ranging (LiDAR) technology, geomorphometric methods are becoming increasingly attractive to many disciplines. The operational focus of geomorphometry is the extraction of land-surface parameters and objects from digital elevation models (DEMs). In the simplest terms, geomorphometry is everything you can extract from DEMs! In last six years, 3 times of conference have been successfully held，brought people in the field of terrain analysis together and provided a platform for more active and fruitful communication and exchange of ideas. The aim of Geomorphometry 2013 is to create a platform for better communications and scholarly exchange among researchers in the fields of terrain analysis, geomorphometry, environmental modeling and geographical information sciences. It is the intention of the conference organizer to allow sufficient discussion and exchange of ideas during the conference sessions, so that the conference will be run in the single session format with sufficient time for each paper presentation and follow-up discussion.