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| author | Kristian Evers <kristianevers@gmail.com> | 2018-03-27 16:47:29 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2018-03-27 16:47:29 +0200 |
| commit | 9874f6078a5fa8981dba6a96adcffbc7a3ec7e8f (patch) | |
| tree | 4d0532ca2a4b2fb832e016723f2cc15900c4876c /docs | |
| parent | a1d924593d55d462536b6243e2e29a5a0386d443 (diff) | |
| parent | bcd647fe82e45efd51c3a64e348b99b38c839e2b (diff) | |
| download | PROJ-9874f6078a5fa8981dba6a96adcffbc7a3ec7e8f.tar.gz PROJ-9874f6078a5fa8981dba6a96adcffbc7a3ec7e8f.zip | |
Merge pull request #906 from kbevers/validate-pipeline-units
Validate pipeline units
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/source/operations/pipeline.rst | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/docs/source/operations/pipeline.rst b/docs/source/operations/pipeline.rst index d7694041..abe98776 100644 --- a/docs/source/operations/pipeline.rst +++ b/docs/source/operations/pipeline.rst @@ -95,4 +95,17 @@ In the following the GRS80 ellipsoid will be applied to all steps. +step +proj=cart +inv +step +proj=merc +**5. Units of operations must match between steps.** + +.. versionadded:: 5.1.0 + +The output units of step *n* must match the expected input unit of step *n+1*. E.g., you can't +pass an operation that outputs projected coordinates to an operation that expects angular units +(degrees). An example of such a unit mismatch is displayed below. + +:: + + +proj=pipeline + +step +proj=merc # Mercator outputs projected coordinates + +step +proj=robin # The Robinson projection expects angular input |