Influence of survey strategy and interpolation model on DEM quality

Milan, David J.; Large, Arg; Fuller, Ian C.

doi:10.1016/j.geomorph.2009.06.024

Cited by 219 publications

(203 citation statements)

References 41 publications

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“…The quality of the DEM is basically a function of the accuracy of individual survey points, field survey strategy and the method of interpolation (Heritage et al 2009). The most popular ways to create DEM models are the regular grid surface (Grid) and triangulated irregular network (TIN) (El-Sheimy et al 2005).…”

Section: Lake Suskie Dem Generation and Morphometry Calculationmentioning

confidence: 99%

Application of Low-Cost Fixed-Wing UAV for Inland Lakes Shoreline Investigation

Templin

Popielarczyk

Kosecki

2017

Pure Appl. Geophys.

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Abstract-One of the most important factors that influences the performance of geomorphologic parameters on urban lakes is the water level. It fluctuates periodically, causing shoreline changes. It is especially significant for typical environmental studies like bathymetric surveys, morphometric parameters calculation, sediment depth changes, thermal structure, water quality monitoring, etc. In most reservoirs, it can be obtained from digitized historical maps or plans or directly measured using the instruments such as: geodetic total station, GNSS receivers, UAV with different sensors, satellite and aerial photos, terrestrial and airborne light detection and ranging, or others. Today one of the most popular measuring platforms, increasingly applied in many applications is UAV. Unmanned aerial system can be a cheap, easy to use, on-demand technology for gathering remote sensing data. Our study presents a reliable methodology for shallow lake shoreline investigation with the use of a low-cost fixed-wing UAV system. The research was implemented on a small, eutrophic urban inland reservoir located in the northern part of Poland-Lake Suskie. The geodetic TS, and RTK/GNSS measurements, hydroacoustic soundings and experimental aerial mapping were conducted by the authors in 2012-2015. The article specifically describes the UAV system used for experimental measurements, the obtained results and the accuracy analysis. Final conclusions demonstrate that even a lowcost fixed-wing UAV can provide an excellent tool for accurately surveying a shallow lake shoreline and generate valuable geoinformation data collected definitely faster than when traditional geodetic methods are employed.

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Section: Lake Suskie Dem Generation and Morphometry Calculationmentioning

confidence: 99%

Application of Low-Cost Fixed-Wing UAV for Inland Lakes Shoreline Investigation

Templin

Popielarczyk

Kosecki

2017

Pure Appl. Geophys.

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“…Coarseness obviously impedes the simulation of fine-scale GSI driven by morphological features that are poorly or not captured by a DEM. For example, breaks-in-slope of the stream surface are major drivers of hyporheic exchange, yet these areas are generally associated with the largest errors in DEMs (Heritage et al 2009;Schäppi et al 2010). …”

Section: Channel-representation Issues the Digital Elevation Modelmentioning

confidence: 99%

“…They may be time consuming or expensive, yet they favor repeatability and some consistency between different datasets. Potential limitations include the high data volume, which must be reduced to a manageable size (Mandlburger et al 2009), and the poor representation of hydraulically significant steep slopes, despite seemingly small sampling intervals (Heritage et al 2009). …”

Section: Generating a Demmentioning

confidence: 99%

Channel Representation in Physically Based Models Coupling Groundwater and Surface Water: Pitfalls and How to Avoid Them

et al. 2014

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Recent models that couple three-dimensional subsurface flow with two-dimensional overland flow are valuable tools for quantifying complex groundwater/stream interactions and for evaluating their influence on watershed processes. For the modeler who is used to defining streams as a boundary condition, the representation of channels in integrated models raises a number of conceptual and technical issues. These models are far more sensitive to channel topography than conventional groundwater models. On all spatial scales, both the topography of a channel and its connection with the floodplain are important. For example, the geometry of river banks influences bank storage and overbank flooding; the slope of the river is a primary control on the behavior of a catchment; and at the finer scale bedform characteristics affect hyporheic exchange. Accurate data on streambed topography, however, are seldom available, and the spatial resolution of digital elevation models is typically too coarse in river environments, resulting in unrealistic or undulating streambeds. Modelers therefore perform some kind of manual yet often cumbersome correction to the available topography. In this context, the paper identifies some common pitfalls, and provides guidance to overcome these. Both aspects of topographic representation and mesh discretization are addressed. Additionally, two tutorials are provided to illustrate: (1) the interpolation of channel cross-sectional data and (2) the refinement of a mesh along a stream in areas of high topographic variability.

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“…The influence of sampling technique on topographic datasets was tested by Heritage et al (2009). However, it is essential to determine the effect of resampling techniques on hydraulic variables.…”

Section: Comparison Of Resampling Techniquesmentioning

confidence: 99%

“…Further studies may look into the application of the rating relationships developed between vertical elevation errors and spatial variability by Heritage et al (2009).…”

Section: Future Work and Recommendationsmentioning

confidence: 99%

Investigating the Role of DEM Resolution and Accuracy on Flood Inundation Mapping

Saksena

2015

World Environmental and Water Resources Congress 2015

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Influence of survey strategy and interpolation model on DEM quality

Cited by 219 publications

References 41 publications

Application of Low-Cost Fixed-Wing UAV for Inland Lakes Shoreline Investigation

Application of Low-Cost Fixed-Wing UAV for Inland Lakes Shoreline Investigation

Channel Representation in Physically Based Models Coupling Groundwater and Surface Water: Pitfalls and How to Avoid Them

Investigating the Role of DEM Resolution and Accuracy on Flood Inundation Mapping

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