A COMPARISON BETWEEN INTERPOLATION METHODS FOR MORE ACCURATE ELEVATION SURFACE USING GNSS AND GIS
Abstract
Elevation surface is a fundamental element of spatial data that can be employed to perform a variety
of geostatistical and spatial analyses. On this basis, this paper presents the assessment of elevation
surfaces interpolation methods such as Inverse Distance Weighting (IDW), Ordinary kriging, and Local
Polynomial Interpolation (LPI). There are three scenarios for achieving this purpose by examining it in
three different areas: mild slope area, steep slope area and combined case. The dimension of each tested
area is decided to be 100*100 m with 121 survey points for each. The ellipsoidal height of survey points are
measured by the Global Navigation Satellite System (GNSS) receiver exploiting the real-time kinematic
(RTK) technique. All survey points are transferred to Arc GIS environment for generating elevation
surfaces and conducting interpolations. Interpolated pixels of surfaces are then compared with the trusted
data collected with GNSS receiver in RTK mode. The result revealed that the total Root Mean Square
(RMS) error for kriging interpolation in the steep area is around 26 cm, whereas RMS for LPI
interpolation in the flat area found to be approximately 8.0 cm. The evaluation outcomes can be utilized to
understand the influence of the slope on interpolation methods as well as to select the most appropriate
method according to the ground relief.
Downloads
References
interpolation method and error propagation
mechanism–creating a DEM from an analogue
topographical map. Journal of Spatial Science,
56(2), 283-304.
Adam, S. M. (2017). THE USE OF ONLINE AND
OFFLINE PROCESSING TOOLS TO
IMPROVE THE PRECISION OF A GPS
PASSIVE STATION. Journal of Duhok
University, 20(1), 335-346. doi:
10.26682/sjuod.2017.20.1.30
Aguilar, F. J., Agüera, F., Aguilar, M. A., Carvajal, F.
J. P. E., & Sensing, R. (2005). Effects of
terrain morphology, sampling density, and
interpolation methods on grid DEM accuracy.
71(7), 805-816.
Arun, P. V. J. T. E. J. o. R. S., & Science, S. (2013). A comparative analysis of different DEM
interpolation methods. 16(2), 133-139.
Brus, D., De Gruijter, J., Marsman, B., Visschers, R.,
Bregt, A., Breeuwsma, A., & Bouma, J. J. E.
(1996). The performance of spatial
interpolation methods and choropleth maps to
estimate properties at points: a soil survey case
study. 7(1), 1-16.
Burrough, P. A. (1998). Principles of geographical
information systems.
Declercq, F. A. N. J. C., & Systems, G. I. (1996).
Interpolation methods for scattered sample
data: accuracy, spatial patterns, processing
time. 23(3), 128-144.
ESRI. (2016). How local polynomial interpolation
works. Retrieved 16 April, 2020, from
https://desktop.arcgis.com/es/arcmap/10.4/exte
nsions/geostatistical-analyst/how-local-
polynomial-interpolation-works.htm
ESRI. (2016 ). How Kriging works. Retrieved 16
April, 2020, from
https://desktop.arcgis.com/en/arcmap/10.4/tool
s/3d-analyst-toolbox/how-kriging-works.htm
ESRI. (2018). geostatistical-analyst. Retrieved 16
April, 2020, from
https://desktop.arcgis.com/es/arcmap/10.4/exte
nsions/geostatistical-analyst.htm
Gallichand, J., & Marcotte, D. J. G. (1993). Mapping
clay content for subsurface drainage in the
Nile Delta. 58(3-4), 165-179.
Rishikeshan, C., Katiyar, S., & Mahesh, V. V. (2014).
Detailed evaluation of DEM interpolation
methods in GIS using DGPS data. Paper
presented at the 2014 International Conference
on Computational Intelligence and
Communication Networks.
Strößenreuther, U., Horwath, M., & Schröder, L.
(2020). How Different Analysis and
Interpolation Methods Affect the Accuracy of
Ice Surface Elevation Changes Inferred from
Satellite Altimetry. Mathematical Geosciences,
1-27.
Weber, D., & Englund, E. J. M. G. (1992). Evaluation
and comparison of spatial interpolators. 24(4),
381-391.
It is the policy of the Journal of Duhok University to own the copyright of the technical contributions. It publishes and facilitates the appropriate re-utilize of the published materials by others. Photocopying is permitted with credit and referring to the source for individuals use.
Copyright © 2017. All Rights Reserved.
