From 0b5c3622e37dcf697db45e8db05fd4ebf045674b Mon Sep 17 00:00:00 2001
From: Kristian Evers <kristianevers@gmail.com>
Date: Thu, 24 May 2018 15:22:43 +0200
Subject: Temporal gridshifting (#1015)

Temporal gridshifts allow [h|v]gridshift operations to be used as step functions
in a pipeline. This is useful in transformations dealing with deformations caused
by earthquakes.

See the included documentation for details.
---
 docs/source/operations/options/t_epoch.rst | 3 +++
 docs/source/operations/options/t_final.rst | 7 +++++++
 2 files changed, 10 insertions(+)
 create mode 100644 docs/source/operations/options/t_epoch.rst
 create mode 100644 docs/source/operations/options/t_final.rst

(limited to 'docs/source/operations/options')

diff --git a/docs/source/operations/options/t_epoch.rst b/docs/source/operations/options/t_epoch.rst
new file mode 100644
index 00000000..76a4473a
--- /dev/null
+++ b/docs/source/operations/options/t_epoch.rst
@@ -0,0 +1,3 @@
+.. option:: +t_epoch=<time>
+
+    Central epoch of the transformation.
diff --git a/docs/source/operations/options/t_final.rst b/docs/source/operations/options/t_final.rst
new file mode 100644
index 00000000..37908209
--- /dev/null
+++ b/docs/source/operations/options/t_final.rst
@@ -0,0 +1,7 @@
+.. option:: +t_final=<time>
+
+    Final epoch that the coordinate will be propagated to after transformation.
+    The special epoch *now* can be used instead of writing a specific period in
+    time. When *now* is used, it is replaced internally with the epoch of the
+    transformation. This means that the resulting coordinate will be slightly
+    different if carried out again at a later date.
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