Gauss Krüger projection for areas of wide longitudinal extent

Enríquez, Carlos

doi:10.1080/13658810701602286

Cited by 13 publications

(8 citation statements)

References 7 publications

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“…Caquard et al's (2008) paper 'Designing sound in cybercartography: from structured cinematic narratives to unpredictable sound/image interactions' and Henriques et al's forthcoming paper 'Carto-SOM: cartogram creation using self-organizing maps' show there is still a great deal of fun to be had in our research, and new areas to explore. Turino's (2008) paper, 'Gauss Kruger projection for areas of wide longitudinal extent', confirms that we have not lost our roots in the process.…”

Section: Trends Over the Past Yearmentioning

confidence: 53%

Recent Trends in IJGISc

Lees¹

2009

International Journal of Geographical Information Science

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Section: Trends Over the Past Yearmentioning

confidence: 53%

Recent Trends in IJGISc

Lees¹

2009

International Journal of Geographical Information Science

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“…However, with the development of mathematical computer software for numerical computing (MATLAB, Maxima, Mathematica, Maple, etc. ), new solutions (Bermejo-Solera and Otero, 2009;Bowring, 1990Bowring, , 1993aDeakin et al, 2010;Engsager and Poder, 2007;Grafarend, 1995;Guo et al, 2020;Ingwersen, 1996;Karney, 2011;Klotz, 1993;Lee, 1962Lee, , 1963Mittermayer, 1993;Thompson, 1975;Turiño, 2004Turiño, , 2008 have been developed for l > ±3.5 • by increasing the number of coefficients in UTM. The coefficients used in the calculations are presented ready to the user.…”

Section: Projection Methods and Data Set For Determination Of Distort...mentioning

confidence: 99%

Proposed single-zone map projection system for Turkey

Yildirim

Kadı

2021

Reports on Geodesy and Geoinformatics

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The coordinate base of the maps or sheets produced is the Universal Transversal Mercator (UTM) conformal projection, and it is not possible to work in a single coordinate system in Turkey. Therefore, a transition from UTM to other conformal projections is required. For the countries extending in an east–west UTM zone width like Turkey, composite projection (CP), a double standard paralleling Lambert Conformal Conic (LCC) and double map projections (DP) are used widely. However, this process causes increase in working load and processing errors by users. This study aims to determine a common projection system that can be used in the whole country. In this context, a composite projection from UTM and LCC projection has been defined for the first time. According to the results obtained, map projection CP with the least distortion values in both east–west and north–south directions has been chosen. With the CP selection, a single coordinate system has been determined for medium- and large-scale maps. Projection correction formulas, scale factor and false origin have been determined for map coordinates in CP. These distortions are obtained with a difference of less than 1 cm for 1 km long sides and less than 0.003″ for the azimuth value of this side, when the correction formulas are used.

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“…Figure 4b shows the edges of the data. The projection of the data is Gauss-Krüger projection [35,36] Meanwhile, it is necessary to introduce the threshold of the NC, an empirical value [32]. When the NC is larger than or equal to the predefined threshold, the suspicious data corresponding to W is considered infringing data.…”

Section: Datasetsmentioning

confidence: 99%

“…Figure 4b shows the edges of the data. The projection of the data is Gauss-Krüger projection [35,36]…”

Section: Datasetsmentioning

confidence: 99%

Zero Watermarking for the TIN DEM Data Based on the Edge Length

Zhou

Zhu

Ren

2021

IJGI

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How to keep the fidelity of the digital elevation model (DEM) data is a crucial problem in the current watermarking research, as the watermarked DEM data need to preserve their accuracy. We proposed a zero watermarking method for the triangulated irregular network (TIN) DEM data. It takes full advantage of the characteristics of the edge length in the TIN DEM data. First, the radio of the edge lengths is quantified to the watermark index, and then the comparison of the edge lengths is quantified to the watermark bit. Finally, the watermark is constructed by combing the watermark bits according to the watermark indices with the help of the majority voting mechanism. In the method, the TIN DEM data are only used to construct the watermark, not to be embedded by the watermark. Therefore, the data quality is preserved to the greatest extent. Experiments verify the theoretical achievements of this method and demonstrate the method is lossless to the TIN DEM data. Simulation results also show that the method has good robustness on translation, rotation, scaling, and cropping attacks.

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Gauss Krüger projection for areas of wide longitudinal extent

Cited by 13 publications

References 7 publications

Recent Trends in IJGISc

Recent Trends in IJGISc

Proposed single-zone map projection system for Turkey

Zero Watermarking for the TIN DEM Data Based on the Edge Length

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