Module Geographic Distances
Calculates for all segments of the input lines the planar, great elliptic, and loxodrome distance and re-projects the latter two to the projection of the input lines.
Projection routines make use of the Proj.4 Cartographic Projections library.
Proj.4 was originally developed by Gerald Evenden and later continued by the United States Department of the Interior, Geological Survey (USGS).
Proj.4 Version is Rel. 4.7.1, 23 September 2009
Proj.4 Homepage
- Author: O. Conrad (c) 2015
- Specification: grid
- Menu: Projection|Tools
Parameters
| | Name | Type | Identifier | Description | Constraints |
|---|
| Input | Segments | Shapes (input) | PLANAR | - | - |
| Output | Great Elliptic | Shapes (output) | ORTHODROME | - | - |
| Loxodrome | Shapes (output) | LOXODROME | - | - |
| Options | Epsilon | Floating point | EPSILON | defines the maximum resolution [km] for the re-projected distance segments | Minimum: 1.000000
Default: 100.000000 |
Command-line
Usage: saga_cmd pj_proj4 20 [-PLANAR <str>] [-ORTHODROME <str>] [-LOXODROME <str>] [-EPSILON <str>]
-PLANAR:<str> Segments
Shapes (input)
-ORTHODROME:<str> Great Elliptic
Shapes (output)
-LOXODROME:<str> Loxodrome
Shapes (output)
-EPSILON:<str> Epsilon
Floating point
Minimum: 1.000000
Default: 100.000000