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| author | Martin Dobias <wonder.sk@gmail.com> | 2020-03-25 22:22:03 +0100 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-03-25 22:22:03 +0100 |
| commit | f7e157749f4b47bff01ae29fc36723271c0bd3ae (patch) | |
| tree | d70ba3cdb90d034ff15d2aae39bd11d65a13e8f4 /sk_gku | |
| parent | eae13e7b25da2b287688bd1d7092d70a86d348a5 (diff) | |
| download | PROJ-data-f7e157749f4b47bff01ae29fc36723271c0bd3ae.tar.gz PROJ-data-f7e157749f4b47bff01ae29fc36723271c0bd3ae.zip | |
Add horizontal grid for Slovakia - JTSK03 to JTSK (EPSG:8364) (#17)
Diffstat (limited to 'sk_gku')
| l--------- | sk_gku/.github/README.md | 1 | ||||
| -rw-r--r-- | sk_gku/sk_gku_JTSK03_to_JTSK.tif | bin | 0 -> 183132 bytes | |||
| -rw-r--r-- | sk_gku/sk_gku_README.txt | 29 |
3 files changed, 30 insertions, 0 deletions
diff --git a/sk_gku/.github/README.md b/sk_gku/.github/README.md new file mode 120000 index 0000000..86629c0 --- /dev/null +++ b/sk_gku/.github/README.md @@ -0,0 +1 @@ +../sk_gku_README.txt
\ No newline at end of file diff --git a/sk_gku/sk_gku_JTSK03_to_JTSK.tif b/sk_gku/sk_gku_JTSK03_to_JTSK.tif Binary files differnew file mode 100644 index 0000000..50ebaf6 --- /dev/null +++ b/sk_gku/sk_gku_JTSK03_to_JTSK.tif diff --git a/sk_gku/sk_gku_README.txt b/sk_gku/sk_gku_README.txt new file mode 100644 index 0000000..10bc2a8 --- /dev/null +++ b/sk_gku/sk_gku_README.txt @@ -0,0 +1,29 @@ +# sk_gku_README.txt + +The files in this section result from the conversion of datasets originating +from [GKU](https://www.geoportal.sk/en/) (Geodetic and Cartographic Institute). + +## Included grids + +### Slovakia: JTSK03 -> JTSK + +*Source*: [GKU](https://www.geoportal.sk/en/geodeticke-zaklady/download/) +*Format*: GeoTIFF converted from NTv2 +*License*: [Creative Commons Attribution 4.0](http://creativecommons.org/licenses/by/4.0/) + +This is digital datum shift model for horizontal coordinates transformation between JTSK03 and JTSK +reference frames of S-JTSK coordinate refernce system in the territory of Slovakia. +Transformation shift model involves the vectors of coordinate differences defined +in the plane JTSK03 on 684 identical points. It is the same set of identical points, which +has been used for the computation of the 7 Helmert transformation parameters of the global transformation key. +The computed coordinate differences characterize systematic non-homogeneity of the JTSK frame, but +do not aptly describe detailed non-homogeneity of lesser localities on cm level. +For purposes of the unambiguous definition of transformation relation between the JTSK03 and JTSK +frames it was necessary to express coordinate differences in the form of a regular grid and to define +the interpolation method. For this purpose the coordinate differences between JTSK03 and JTSK +in the shape of ellipsoidal coordinates on Bessell1841 ellipsoid for individual axes have been +interpolated by the Surfer software kriging method into a regular grid with a step 0.0168 deg (latitude) x 0.025 deg (longitude). + +For correct usage of those shift models always check your outputs with transformation service: https://zbgis.skgeodesy.sk/rts/en/Transform + +* sk_gku_JTSK03_to_JTSK.tif |