Reprojects feature coordinates from one coordinate system to another using the REFRAME library. This transformer handles the usual planimetric and altimetric reference frame change for Switzerland.
The following Swiss reference frames are supported:
- Plane coordinates LV03 (CH1903)
- Plane coordinates LV95 (CH1903+)
- National levelling network LN02 (levelled heights)
- National height network LHN95 (orthometric heights, CHGeo2004)
- Ellipsoidal heights (Bessel)
Source planimetric reference frame
Specifies the reference frame used for source ground measurements.
Destination planimetric reference frame
Specifies the reference frame used for destination ground measurements.
Source altimetric reference frame
Specifies the reference frame used for source height measurements.
Destination altimetric reference frame
Specifies the reference frame used for destination height measurements.
Cell Size (Raster Only)
The Cell Size applies only to raster features.
Stretch Cells: The cell size of the raster will be adjusted to maintain the same number of rows and columns in the reprojected raster as there were in the input raster.
Square Cells: The number of rows and columns as well as the spacing will be changed to maintain approximately the same cell ground area and form square cells where the horizontal and vertical cell sizes are equal. Like the Square Cells option, Preserve Cells will change both the number of rows and columns and the spacing to maintain cell ground area, but will also try to preserve the original cell aspect ratio, taking into account any warping caused by the reprojection.
Preserve Cells: Like the Square Cells option, this option will change both the number of rows and columns and the spacing to maintain cell ground area, but will also try to preserve the original cell aspect ratio, taking into account any warping caused by the reprojection.
Interpolation Type (Raster Only)
The Interpolation Type affects only raster data. Cell values are interpolated in order to change the raster to the specified size.
Nearest Neighbor is the fastest but produces the poorest image quality.
Bilinear provides a reasonable balance of speed and quality.
Bicubic is the slowest but produces the best image quality.
Average 4 and Average 16 have a performance similar to Bilinear and are useful for numeric rasters such as DEMs.
Usage Notes
To perform a reference frame change, select the planimetric and altimetric input and output frames.
The input and output reference frames can be the same (or empty): it allows you to perform only a planimetric or only an altimetric transformation.
For more information about REFRAME, please refer to the documentation available (PDF) or to swisstopo website:
http://www.swisstopo.ch/geosoftware
For more information about Swiss reference frames:
http://www.swisstopo.admin.ch/internet/swisstopo/en/home/topics/survey/sys/frames.html
If you are experiencing problems, please check that the following components are installed on your computer:
- Microsoft Visual C++ 2010 Redistributable Package (x86 or x64)
- Microsoft .NET Framework 4
Version 3.0 (04.2014) © swisstopo
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