<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>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.</p>
</abstract>

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.

Proposed single-zone map projection system for Turkey

Reports on Geodesy and Geoinformatics

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

{"article-title":"Proposed single-zone map projection system for Turkey"}

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...

Proposed single-zone map projection system for Turkey

Article Category: Original Article

Published Online: Jan 03, 2022

Page range: 35 - 45

Received: Aug 12, 2021

Accepted: Nov 29, 2021

DOI: https://doi.org/10.2478/rgg-2021-0006

Keywords
Universal Transverse Mercator (UTM), Lambert conformal conic (LCC), composite projection, distortion, scale

© 2021 Faruk Yildirim et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Proposed single-zone map projection system for Turkey

Article Category: Original Article

Published Online: Jan 03, 2022

Page range: 35 - 45

Received: Aug 12, 2021

Accepted: Nov 29, 2021

DOI: https://doi.org/10.2478/rgg-2021-0006

KeywordsUniversal Transverse Mercator (UTM), Lambert conformal conic (LCC), composite projection, distortion, scale

© 2021 Faruk Yildirim et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
Universal Transverse Mercator (UTM), Lambert conformal conic (LCC), composite projection, distortion, scale