Modeling Spatial Relationships between Geodetic Control Points and Land Use with Regards to Polish Regulation

2016 ◽  
Author(s):  
Krzysztof Pokonieczny ◽  
Beata Calka ◽  
Elzbieta Bielecka ◽  
Pawel Kaminski
Keyword(s):  
Land Use ◽  
Spatial Relationships ◽  
Control Points ◽  
Geodetic Control

Analysis of Geodetic Control Points Density Depending on the Land Cover and Relief – the Opoczno District Case Study

2017 ◽  
Author(s):  
Krzysztof Pokonieczny ◽  
Elzbieta Bielecka ◽  
Paweł Kaminski
Keyword(s):  
Land Use ◽  
Land Cover ◽  
Rural Areas ◽  
Pearson Correlation ◽  
Coefficient Of Determination ◽  
Control Points ◽  
Global Index ◽  
Clustering Methods ◽  
Geodetic Control

The main goal of this study is an analysis of statistical and spatial relationships between land cover, relief and geodetic control points’ location. We aimed at proving the previous results showing that in rural areas the density of horizontal geodetic points depends at least 50% on the land cover. Moreover, two clustering methods, k-means and Kohonen self-organising maps, were used to group surveying districts according to similarity in land use, relief and geodetic control density. The research methods includes statistical methods, ie. Pearson correlation and coefficient of determination computed by Pawlowski method as well as spatial autocorrelation expressed by Moran I global index. The results show that both clustering methods give very similar results, however for the k-means the surveying districts are more spatially clustered, than for Kohonen. The coefficient of determination R2 equals 0.652, what means that geodetic control points density in 65.2% explains by the percentage of built-up areas, forests and the standard deviation of elevation. The analysis was conducted for the 3rd order geodetic control points, for Opoczno district, located in the central part of Poland.

scholarly journals Design and Geodetic Adjustment of Levelling Network for Establishment of Unified Control Points in Korea

2021 ◽  
pp. 29-40
Author(s):  
H.K Lee ◽  
S.H. Yun ◽  
J.H. Kwon ◽  
J.S. Lee
Keyword(s):  
Pilot Study ◽  
Vertical Component ◽  
Reference Points ◽  
Spatial Density ◽  
Control Points ◽  
Network Adjustment ◽  
Technical Challenge ◽  
Adjustment Procedure ◽  
Geodetic Control ◽  
Horizontal Network

The unified control points (UCPs), the multi-dimensional geodetic reference points installed in the low elevated area, has been established in Korea for the combination of the horizontal and the vertical geodetic control. While the 1st-phase UCPs network was completed in 2011 with a spatial density of about 10km, its densification has been underway as the 2nd-phase project. The UCPs supersedes the legacy geodetic points, such as triangulation points and benchmarks (BMs) once the 2nd-phase implementation. Although the horizontal network of the UPCs can be readily realised by GNSS technology, a technical challenge of the vertical component remains to be settled due to characteristics of the geodetic levelling technique. To this end, a pilot study was conducted to design a new version of the UCPs-based levelling network and to demonstrate its effectiveness with a comparison of the legacy. In this paper, a concept of the UCPs-based levelling network is briefly addressed with some prominent examples, and details of a pilot network and its measurements is given with the network adjustment procedure. Finally, results of the adjustments are provided with an emphasis on the influence of the newly designed network in terms of accuracy, reliability and estimated heights.

scholarly journals Spatial relationships between land-use, habitat, water quality and lotic macroinvertebrates in two Swiss catchments

2014 ◽  
Vol 76 (3) ◽  
pp. 375-392 ◽  
Author(s):  
C. T. Robinson ◽  
N. Schuwirth ◽  
S. Baumgartner ◽  
C. Stamm
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Spatial Relationships

scholarly journals A LIBRATION MODEL FOR ENCELADUS BASED ON GEODETIC CONTROL POINT NETWORK ANALYSIS

2016 ◽  
Vol XLI-B4 ◽  
pp. 459-462 ◽  
Author(s):  
I. E. Nadezhdina ◽  
A. E. Zubarev ◽  
E. S. Brusnikin ◽  
J. Oberst
Keyword(s):  
Network Analysis ◽  
Coordinate System ◽  
Control Point ◽  
Image Data ◽  
Control Points ◽  
Global Control ◽  
Cartesian Coordinates ◽  
Voyager 2 ◽  
Librational Motion ◽  
Geodetic Control

A new global control point network was derived for Enceladus, based on Cassini and Voyager-2 image data. Cassini images were taken from 2005 to 2014, for Voyager we have only one flyby in the middle of 1981. We have derived 3D Cartesian coordinates for 1128 control points as well as improved pointing data for 12 Voyager and 193 Cassini images in the Enceladus-fixed coordinate system. The point accuracies vary from 55 m to 2900 m (average point accuracy – 221 m). From tracking of the control points we detect a librational motion described by a model which includes 3 different periods and amplitudes (Rambaux et al., 2011). We determine the amplitudes for each term. Our new control point network has a higher number of point measurements and a higher accuracy than previous data (Giese et al., 2014).

scholarly journals GIScience Theory Based Assessment of Spatial Disparity of Geodetic Control Points Location

2020 ◽  
Vol 9 (3) ◽  
pp. 148
Author(s):  
Elzbieta Bielecka ◽  
Krzysztof Pokonieczny ◽  
Sylwia Borkowska
Keyword(s):  
Nearest Neighbor ◽  
Geodetic Network ◽  
Control Points ◽  
Outlier Analysis ◽  
Geodetic Networks ◽  
Land Administration ◽  
Ex Post ◽  
Spatial Cluster Analysis ◽  
Geodetic Control ◽  
Application Fields

Geodetic networks provide a spatial reference framework for the positioning of any geographical feature in a common and consistent way. An even spatial distribution of geodetic control points assures good quality for subordinate surveys in mapping, cadaster, engineering activities, and many other land administration-oriented applications. We investigate the spatial pattern of geodetic control points based on GIScience theory, especially Tobler’s Laws in Geography. The study makes contributions in both the research and application fields. By utilizing Average Nearest Neighbor, multi-distance spatial cluster analysis, and cluster and outlier analysis, it introduces the comprehensive methodology for ex post analysis of geodetic control points’ spatial patterns as well as the quantification of geodetic networks’ uniformity to regularly dense and regularly thinned. Moreover, it serves as a methodological resource and reference for the Head Office of Geodesy and Cartography, not only the maintenance, but also the further densification or modernization the geodetic network in Poland. Furthermore, the results give surveyors the ability to quickly assess the availability of geodetic points, as well as identify environmental obstacles that may hamper measurements. The results show that the base geodetic control points are evenly dispersed (one point over 50 sq. km), however they tend to cluster slightly in urbanized areas and forests (1.3 and 1.4 points per sq. km, respectively).

SEASONALLY DRIVEN VARIATION IN SPATIAL RELATIONSHIPS BETWEEN AGRICULTURAL LAND USE AND IN-STREAM NUTRIENT CONCENTRATIONS

2013 ◽  
Vol 30 (4) ◽  
pp. 476-493 ◽  
Author(s):  
A. G. Yates ◽  
R. B. Brua ◽  
J. Corriveau ◽  
J. M. Culp ◽  
P. A. Chambers
Keyword(s):  
Land Use ◽  
Agricultural Land ◽  
Nutrient Concentrations ◽  
Agricultural Land Use ◽  
Spatial Relationships
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