Photogrammetry is experiencing an era of democratization mostly due to the popularity and availability many commercial off-the-shelf devices, such as drones smartphones. They are used most convenient effective tools for high-resolution image acquisition a wide range applications in science, engineering, management, cultural heritage. However, quality, particularly geometric accuracy, outcomes f...

The application of structure-from-motion (SfM) to generate digital terrain models (DTMs) derived from different image sources has strongly increased, the major reason for this being that processing is substantially easier with SfM than with conventional photogrammetry. To test the functionality in a demanding environment, we applied SfM and conventional photogrammetry to archival aerial images ...

JET (Joint European Torus) Joint Undertaking is currently planning to install its new Gasbox Divertor remotely. In line with JET’s policy and philosophy, it was decided to survey the divertor structure remotely to confirm its position, shape and integrity prior to installing the new tile configuration. A survey to metrology standards with sub-millimetre accuracy is required. While remote survey...

Matching ERS scatterometer based soil moisture patterns with simulations of a conceptual dual layer hydrologic model over Austria J. Parajka, V. Naeimi, G. Blöschl, and J. Komma Institute for Hydraulic and Water Resources Engineering, Vienna University of Technology, Vienna, Austria Institute of Photogrammetry and Remote Sensing, Vienna University of Technology, Vienna, Austria on leave from: I...

Due to the nature of many applications, it is difficult with present technology to use a single type of sensor to automatically, accurately, reliably, and completely measure or map, in three-dimensions, objects, sites, or scenes. Therefore, a combination of various sensor technologies is usually the obvious solution. There are several 3-D technologies, two of which; digital photogrammetry and t...

Creating a model, instead of just making measurements, is a common task in photogrammetry today. Methods can vary depending on the requirements, data availability, and type of scenery. The amount of user input is one major differentiating factor. The methods discussed in this paper align closely with a typical workflow for urban mapping from aerial photographs.

The paper deals with an Italian research Project on direct photogrammetry, active in the period 2003-2004. Among its most interesting features are: usage of a rich test site, having 160 artificial GCPs and 60 natural ones; performing of four dedicated flights, each containing different blocks at different scales. The goals and the phases of the Project are described, together with the test site...

Soil moisture-runoff relation at the catchment scale as observed with coarse resolution microwave remote sensing K. Scipal, C. Scheffler, and W. Wagner Vienna University of Technology Institute of Photogrammetry and Remote Sensing, Vienna, Austria University of Jena, Institute of Geography, Jena, Germany Christian Doppler Laboratory “Spatial Data from Laser Scanning and Remote Sensing”, Vienna,...

In this study, a multi-scale approach is used to improve the segmentation of a high spatial resolution (30 cm) color infrared image of a residential area. First, a series of 25 image segmentations are performed in Definiens Professional 5 using different scale parameters. The optimal image segmentation is identified using an unsupervised evaluation method of segmentation quality that takes into...