The article discusses the construction of a digital terrain model in various programs, which will be used for vertical planning design. One major challenges this area is creation an accurate and realistic surface, give opportunity to create quality compliant site. To solve problem analyze, same territory initial data has been built. paper presents algorithms DTM method constructing irregular gr...

This work focused on the collection and preparation of data required for hydrological modelling Beht catchment area, which covers an area 4560 km 2 with a perimeter 414 km, by combining various spatial technologies, in particular geographical information systems (GIS), remote sensing, digital terrain models (DTM), order to prepare used flood forecasting. The methodology consists, at first, auto...

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 ...

The present work deals with the problems related to the generation of Digital Terrain Model (DTM) of braided rivers by means of the open source GIS GRASS. In particular, we investigated how to optimize the terrain survey, that is how to reduce the density of topographic points that we have to survey and which is their best distribution, related to the employed interpolation method and with resp...

This paper tests the suitability of automated point cloud classification tools provided by popular image-based modeling (IBM) software package Agisoft Metashape for generation digital terrain models (DTMs) at moderately-vegetated archaeological sites. DTMs are often required various forms mapping and analysis. The suite relatively user-friendly as compared to many algorithms do not require use ...

The increasing use of Geographic Information System applications has generated a strong interest in the assessment of data quality. As an example of quantitative raster data, we analyzed errors in Digital Terrain Models (DTM). Errors might be classified as systematic (strongly dependent on the production methodology) and random. The present work attempts to locate some types of randomly distrib...

During the last decade laser scanning turned out to be one of the most promising techniques in photogrammetry. Some photogrammetrists even say that laser scanning has caused a paradigm change in photogrammetry because of its big impact on methods like DTM generation or 3D city model reconstruction. Originally, laser scanning was designed for DTM generation in forest areas. For that purpose seve...

This paper focuses on evaluating and optimizing the computation procedures for achieving real-time mapping with modern Airborne Laser Scanning (ALS) instrumentation. The computation steps under consideration include real-time point cloud generation at full resolution, strip-wise analyses of scanning density and coverage, error propagation, ground classification and digital terrain and surface m...

abstract a significant deficiency of most computer models used for stream floodplain analysis is that the locations of structures impacted by floodwaters, such as bridges, roads, and buildings, cannot be effectively compared to the floodplain location. this research presents a straightforward approach for processing output of the hec-ras hydraulic model, to enable two- and three dimensional flo...

Most of the proposed methods for automatic DTM reconstruction are based on parametric estimation processes with very little capabilities for reasoning and decision making. Human operators which measure DTMs solve interpretation related problems while they carry out the geometric measurements. When working with terrain often decisions have to be made which are of imprecise nature. For those prob...