Use of LIDAR ISOK data Available With the Use of Geoportal 2 Website for Discovering Archaeological Sites (original) (raw)
Related papers
AERIAL LASER SCANNING IN ARCHEOLOGY
cipa.icomos.org
Technology of aerial laser scanning is often well used for a DTM generation. The DTM (digital surface model) displayed in appropriate form, e.g. shaded surface, can be used as a data source for searching for archaeological sites. Aerial laser scanning data acquisition is unfortunately too expensive for noncommercial projects. It can be a solution to use the ALS data acquired primarily for another purpose by public service. In general, this data has lower density than the expensive custom-made data, but in a limited size can be borrowed for some research purpose. We tested the data from The Czech Office for Surveying, Mapping and Cadastre. The aim was to find if possible to use data characterized by a density of about 1 point/m 2 for archaeological research. We used the DTM in the form of shaded surface and inspected the data around few well known archaeological sites of different periods. It is also possible to use different outputs from the original DTM to better display terrain discontinuities caused by man's activity.
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XLI-B5, 2016
This paper deals with the non-destructive documentation of the "Radkov" (Svitavy district, Czech Republic) archaeological site. ALS, GPR and land survey mapping will be used for the analysis. The fortified hilltop settlement "Radkov" is an immovable historical monument with preserved relics of anthropogenic origin in relief. Terrain reconnaissance can identify several accentuated objects on site. ALS enables identification of poorly recognizable archaeological objects and their contexture in the field. Geophysical survey enables defunct objects identification. These objects are hidden below the current ground surface and their layout is crucial. Land survey mapping provides technical support for ALS and GPR survey. It enables data georeferencing in geodetic reference systems. GIS can then be used for data analysis. M. Cejpová and J. Němcová have studied this site over a long period of time. In 2012 Radkov was surveyed using ALS in the project "The Research of Ancient Road in Southwest Moravia and East Bohemia". Since 2015 the authors have been examining this site. This paper summarises the existing results of the work of these authors. The digital elevation model in the form of a grid (GDEM) with a resolution 1 m of 2012 was the basis for this work. In 2015 the survey net, terrain reconnaissance and GPR survey of two archaeological objects were done at the site. GDEM was compared with these datasets. All datasets were processed individually and its results were compared in ArcGIS.
Journal of Archaeological Science, 2011
"Airborne Light Detection and Ranging (LiDAR) is a quite recent (mid-1990s) remote sensing technique used to measure terrain elevation. Recent studies have examined the possibility of using LiDAR in archaeological investigations to map and characterize earthworks, to capture features that may be indistinguishable on the ground and to aid the planning of archaeological excavation campaigns. Despite the great potential of LiDAR in archaeology, also linked to its unique capability to penetrate vegetation canopies and identify archaeological earthworks and remains even under dense vegetation cover, the use of airborne laser scanning data encounters serious challenges. Data filtering and processing as well as pattern extraction, classification of terrain information from raw LiDAR data is still a challenging ongoing research. In this paper, we present the data processing chain along with the threshold-based algorithm we devised for the classification of ground and non-ground points and for the detection of archaeological features. The classification of laser data was performed using a strategy based on a set of “filtrations of the filtrate”. Appropriate criteria for the classification and filtering were set to gradually refine the intermediate results in order to obtain the vegetation heights and to discriminate between canopy, understory and micro-topographic relief of archaeological interest. We selected sample areas within two abandoned medieval settlements in Southern Italy characterized by the presence of low and heterogeneous herbaceous cover and complex topographical and morphological features, which make the identification of archaeological features really complex. Results from our investigations pointed out that the applied data processing enables the detection of micro-topographic relief in sparsely as well as in densely vegetated areas. The most important facts to cope with different environmental situations are mainly linked with (i) the resolution of the acquired data set and (ii) the data acquisition and processing chain specifically devised for archaeological purposes."
Banaszek Ł. 2015. Airborne Laser Scanning and visibility analyses. Some remarks on the use of ALS in archaeological interpretation, [w:] A.G. Posluschny (red.), Sensing the Past. Contributions from the ArcLand Conference on Remote Sensing for Archaeology. Bonn: Habelt-Verlag, 40-41., 2015
Viewshed analysis is one of many beneficiaries of the application of Airborne Laser Scanning in archaeology. High quality data allows calculation of the visibility of a single object (Fig 1). At the same time, interpretation of ALS derivatives shows some limitations of such an analysis. The aim of this paper is to present a significant aspect of landscape dynamics, which alters the results of viewshed calculations. It was identified during the research conducted in the vicinities of Polanów.
AIRBORNE LASER SCANNING AND LANDSCAPE ARCHAEOLOGY
Opuscula archaeologica 39/40(1), 2018
Airborne lidar (Light Detection And Ranging), ALS or ALSM (Airborne Laser Scanning, Airborne Laser Swath Mapping) is an active remote sensing technique , which records the surface of the earth using laser scanning. ALS allows very precise three-dimensional mapping of the surface of the earth, producing high-resolution topographic data, even where surface is obscured by forest and vegetation. The level of detail on digital surface and terrain models produced from high resolution ALS topographic data helps us enormously in identification of past events, which reworked and modified the surface of the earth. However , interpretation of ALS data poses much more than technical challenges. ALS does not provide only a layer of data, but offers a different view of landscape. What kind of landscapes do we see with ALS?
Extraction of archaeological features from high-resolution LIDAR data
In May 2009, the State Office for Cultural Heritage Management Baden-Württemberg launched a three-year project aimed at the complete archaeological mapping of Baden-Württemberg using highresolution airborne LIDAR (Light Detection And Ranging) data, covering an area of 35751 km2. The goal is the verification and extension of the existing archaeological data base. To achieve this goal, a data processing method and workflow for the extraction of Local Relief Models from LIDAR-based Digital Elevation Models was developed. Colour-coded maps of these Local Relief Models are found to be a valuable tool for archaeological prospection. First results of the project confirm the feasibility of using LIDARbased data for the archaeological mapping of very large areas.
LiDAR for Archaeological Research and the Study of Historical Landscapes
Sensing the Past, 2017
Remote sensing technologies have helped to revolutionize archaeology. LiDAR (light detection and ranging), a remote sensing technology in which lasers are used as topographic scanners that can penetrate foliage, has particularly influenced researchers in the field of settlement or landscape archaeology. LiDAR provides detailed landscape data for broad spatial areas and permits visualization of these landscapes in ways that were never before possible. These data and visualizations have been widely utilized to gain a better understanding of historical landscapes and their past uses by ancient peoples.