Using GIS to visualise environmental information a case study based on digital terrain models

2002 ◽  
Author(s):  
A. Clematis ◽  
M. De Martino
Keyword(s):  
Environmental Information ◽  
Digital Terrain Models ◽  
Digital Terrain ◽  
Terrain Models

scholarly journals Detection of earthflow dynamics using medium-resolution digital terrain models: Diachronic perspective of the Jovac earthflow, Southern Serbia

2021 ◽  
Vol 61 (2) ◽  
pp. 187-206
Author(s):  
Marko Milošević ◽  
Dragoljub Štrbac ◽  
Jelena Ćalić ◽  
Milan Radovanović
Keyword(s):  
Digital Terrain Models ◽  
Digital Terrain ◽  
Terrain Models ◽  
Landslide Volume ◽  
Medium Resolution ◽  
Before And After ◽  
Movement Mechanism ◽  
Research Procedure ◽  
Definition Of

The paper presents and discusses the landslide research procedure related to the topography before and after its occurrence, using the comparative analysis of two medium-resolution digital terrain models. The case study is the Jovac mega-landslide—the largest landslide to occur in Serbia in the last 100 years, active for three days in February 1977. The indicators used to determine the volume and movement mechanism were the spatial distribution of elevation differences within the two digital terrain models (DTM), and the analysis of geomorphological features before the landslide. The obtained elevation differences allowed the definition of the approximate landslide volume: 11.6 × 106 m3. All the data obtained indicate that the movement mechanism falls into the category of earthflow.

scholarly journals Digital Deforestation: Comparing Automated Approaches to the Production of Digital Terrain Models (DTMs) in Agisoft Metashape

Quaternary ◽  
2022 ◽  
Vol 5 (1) ◽  
pp. 5
Author(s):  
Matthew D. Howland ◽  
Anthony Tamberino ◽  
Ioannis Liritzis ◽  
Thomas E. Levy
Keyword(s):  
Point Cloud ◽  
Archaeological Sites ◽  
Digital Terrain Models ◽  
Digital Terrain ◽  
Terrain Models ◽  
Cloud Classification ◽  
Classification Tool ◽  
Point Cloud Classification ◽  
User Friendly

This paper tests the suitability of automated point cloud classification tools provided by the popular image-based modeling (IBM) software package Agisoft Metashape for the generation of digital terrain models (DTMs) at moderately-vegetated archaeological sites. DTMs are often required for various forms of archaeological mapping and analysis. The suite of tools provided by Agisoft are relatively user-friendly as compared to many point cloud classification algorithms and do not require the use of additional software. Based on a case study from the Mycenaean site of Kastrouli, Greece, the mostly-automated, geometric classification tool “Classify Ground Points” provides the best results and produces a quality DTM that is sufficient for mapping and analysis. Each of the methods tested in this paper can likely be improved through manual editing of point cloud classification.

scholarly journals Estimated Land and Building Tax using Aerial Photography (Case Study: Tingkir District, Salatiga City)

2020 ◽  
Vol 4 (2) ◽  
pp. 372-378
Author(s):  
Josef Allen ◽  
Frederik Samuel Papilaya
Keyword(s):  
Aerial Photographs ◽  
Digital Terrain Models ◽  
Raster Calculator ◽  
Digital Terrain ◽  
Terrain Models ◽  
Surface Models ◽  
Building Area ◽  
The City ◽  
Area Data

Salatiga, a city that borders directly and is surrounded by Semarang Regency. It has an area of ​​56.78 km2, with four sub-districts including, Sidorejo Regency, Argomulyo Regency, Tingkir Regency, and Sidomukti Regency, which covers 23 villages. The city of Salatiga has a fairly high population density with a proportion of more than 3300 inhabitants / km2. In this study took place in the Central Tingkir and Tingkir Lor areas by taking several points that are considered as housing as a case study. This study aims to estimate the price of land and building tax on an object of land and building tax. The process of this research uses aerial photo processing, where aerial photographs will be processed using professional software Agisoft photoscan to become an orthophoto, digital surface models and digital terrain models to obtain building area and land area data, then digital surface models and digital terrain models are processed . with ArcGIS 10.6 software using a raster calculator to get the height of the object to be used as the height of the building. The data obtained will be used to perform land and building tax calculations. The results of this study estimate the estimated land and building tax prices of at least IDR 37,313.00 and a maximum value of IDR 3,809,763.00.  

scholarly journals Nationwide Digital Terrain Models for Topographic Depression Modelling in Detection of Flood Detention Areas

Water ◽  
2014 ◽  
Vol 6 (2) ◽  
pp. 271-300 ◽  
Author(s):  
Jenni-Mari Vesakoski ◽  
Petteri Alho ◽  
Juha Hyyppä ◽  
Markus Holopainen ◽  
Claude Flener ◽  
...  
Keyword(s):  
Digital Terrain Models ◽  
Digital Terrain ◽  
Terrain Models
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