Analysis of influence of terrain relief roughness on DEM accuracy generated from LIDAR in the Czech Republic territory

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60162694%3AG43__%2F16%3A00532638" target="_blank" >RIV/60162694:G43__/16:00532638 - isvavai.cz</a>

Result on the web

<a href="http://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XLI-B4/25/2016/" target="_blank" >http://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XLI-B4/25/2016/</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5194/isprsarchives-XLI-B4-25-2016" target="_blank" >10.5194/isprsarchives-XLI-B4-25-2016</a>

Result language

angličtina

Original language name

Analysis of influence of terrain relief roughness on DEM accuracy generated from LIDAR in the Czech Republic territory

Original language description

Digital elevation models are today a common part of geographic information systems and derived applications. The way of their creation is varied. It depends on the extent of area, required accuracy, delivery time, financial resources and technologies available. The first model covering the whole territory of the Czech Republic was created already in the early 1980's. Currently, the 5th DEM generation is being finished. Data collection for this model was realized using the airborne laser scanning which allowed creating the DEM of a new generation having the precision up to a decimetre. Model of such a precision expands the possibilities of employing the DEM and it also offers new opportunities for the use of elevation data especially in a domain of modelling the phenomena dependent on highly accurate data. The examples are precise modelling of hydrological phenomena, studying micro-relief objects, modelling the vehicle movement, detecting and describing historical changes of a landscape, designing constructions etc. Due to a nature of the technology used for collecting data and generating DEM, it is assumed that the resulting model achieves lower accuracy in areas covered by vegetation and in built-up areas. Therefore the verification of model accuracy was carried out in five selected areas in Moravia. To determine the reference heights of check points, the known geodetic points whose heights were defined using levelling were used. Up to several thousands of points were surveyed in each area. Individual points were selected according to a different configuration of relief, different surface types, and different vegetation coverage. The sets of deviations were obtained by comparing the DEM 5G heights with reference heights which was followed by verification of tested elevation model. Results of the analysis showed that the model reaches generally higher precision than the declared one in majority of areas.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

KA - Militarism

OECD FORD branch

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Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLI-B4, 25-30, 2016

ISBN

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ISSN

1682-1750

e-ISSN

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Number of pages

6

Pages from-to

25-30

Publisher name

ISPRS

Place of publication

Praha

Event location

Praha

Event date

Jul 12, 2016

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000392752100004