This paper describes the processing of IKONOS and QUICKBIRD imagery of two different datasets in Switzerland for analyzing the geometric accuracy potential of these images for 3D point positioning, and orthoimage and DSM generation. The first dataset consists of panchromatic and multispectral IKONOS and QUICKBIRD images covering the region of Geneva. In the second area around Thun with a height...

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...

We investigated the capabilities of a canopy height model (CHM) derived from aerial photographs using the Structure from Motion (SfM) approach to estimate aboveground biomass (AGB) in a tropical forest. Aerial photographs and airborne Light Detection and Ranging (LiDAR) data were simultaneously acquired under leaf-on canopy conditions. A 3D point cloud was generated from aerial photographs usin...

High-resolution satellite images (HRSI) at sub-5m footprint such as IKONOS, IRS-P5 (CartoSat-1) and SPOT-5 HRG/HRS images are becoming increasingly available to the earth observation community and their respective clients. HRSI is one of the main data sources for the Project of Western China Topographic Mapping (WChTM) which has been approved by the State Council of China in year 2006. New adva...

Abstract. The paper introduces a software called Bulldozer, designed to extract Digital Terrain Model (DTM) from Surface (DSM) obtained various sensors. is based on modified version of the multi-scale Drap Cloth principle process noisy DSMs any size, employing tiling strategy and stability margin ensure consistent results. A parameter max object size introduced differentiate objects ground duri...

Very high resolution (VHR) DSMs (digital surface models) derived from stereoor multi-stereo images from current VHR satellites like WorldView-2 or Pléiades can be produced up to the ground sampling distance (GSD) of the sensors in the range of 50 cm to 1 m. From such DSMs the digital terrain model (DTM) representing the ground and also a so called nDEM (normalized digital elevation model) descr...

Models of urban areas are an important input for many applications in the field of urban monitoring. Besides the creation and updating of maps from sprawling urban settlements the models are also used for simulation and planning in case of catastrophic events like flooding, tsunamis or earth quakes. With the availability of very high resolution (VHR) satellite data investigations of large urban...

This article first introduces oblique aerial imagery, then describes how vertical distances can be measured once the pixel distances of the original pictures are known. The calculations require that, not only all camera settings be known, but also that one relies on the availability of detailed digital terrain and digital surface models (DSM and DTM), in order to provide the necessary ground le...