An important issue when planning the tasks that a mobile robot has to reach is the path that it has to follow. In that sense, classical path planning algorithms focus on minimizing the total distance, generally assuming a flat terrain. Newer approaches also include traversability cost maps to define the terrain characteristics. However, this approach may generate unsafe paths in realistic envir...

This paper describes an algorithm in order to derive DTMs (Digital Terrain Models) from correlation DSMs (Digital Surface Models) and above-ground (buildings and vegetation) masks in dense urban areas. Among all the methods found in literature, the Elastic Grid method shows a good capability to reconstruct the topographic surface. This method consists in interpolating height values under above-...

This report compares Digital Terrain Models (DTM) created through two separate processes from the same source data. Using mass point and breakline data provide by a private contractor as part of the State Addressing and Mapping Board (SAMB) project, we created two versions of a DTM for the Lorado 7 1⁄2’ Quadrangle in southern West Virginia. We first employed the traditional method of transformi...

This article presents a review of the combined analysis of digital terrain models (DTMs) and remotely sensed data in landscape investigations. The utilization of remotely sensed data with DTMs has become an important trend in geomatics in the past two decades. Models of more than ten quantitative topographic variables are employed as ancillary data in the treatment of images. The article review...

Generating dense digital surface models (DSM) is a vital step in all photogrammetric work. Its precise production influences the quality of subsequent products including the digital terrain model (DTM) and orthomosaic. SimActive’s proven DSM capability is employed throughout the industry for its precision and high processing speed. With today’s demands for larger and denser DSMs, a considerable...

A novel method to map and quantitatively describe very gentle folds (limb dip <5°) at cratonic cave sites was evaluated Snail Shell Nanna caves, central Tennessee, USA. Elevations from the global SRTM digital terrain model (DTM) were assigned points on late Ordovician geologic contacts, elevations of used interpolate 28 m cell size natural neighbor elevation models (DEM’s) contacts. The Fore...

Laser Altimetry, more referred in the commercial sector as LIDAR (Light Detection and Ranging) mapping, is establishing as a common operational tool in the fields of mapping, remote sensing and fotogrametry. LIDAR can to generate quickly dense and accurate digital terrain model. For applications that need digital terrain models with high density and accuracy, as in projects of highway engineeri...

Soil erosion monitoring is a pivotal exercise at macro through micro landscape levels, which directly informs environmental management diverse spatial and temporal scales. The of soil can be an arduous task when completed ground-based surveys there are uncertainties associated with the use large-scale medium resolution image-based digital elevation models for estimating rates. LiDAR derived hav...

In this paper the accuracy of automatic DTM computation on the digital photogrammetric workstation DPW770 of LeicaHelava will be discussed. The software component of the photogrammetric System is the Softcopy Exploitation Tool (SOCET SET) by Helava, with module "Terrain". Basis for the investigation was a test data set (image scale 1:13000) of the Institute for Photogrammetrie of Stuttgart Univ...