fix a few typos (again)

3 files changed, 10 insertions, 10 deletions

diff --git a/docs/source/development/migration.rst b/docs/source/development/migration.rst
index eb509bcf..1ab0a91d 100644
--- a/docs/source/development/migration.rst
+++ b/docs/source/development/migration.rst
@@ -144,7 +144,7 @@ example with the old API the source system is described as
 ``+proj=latlon +ellps=clrk66`` and the destination system is described as
 ``+proj=merc +ellps=clrk66 +lat_ts=33``. Since the Mercator projection accepts
 geodetic coordinates as its input, the description of the source in this case
-is superflous. We use that to our advantage in the new API and simply state
+is superfluous. We use that to our advantage in the new API and simply state
 the destination. This is simple at a glance, but is actually a big conceptual
 change. We are now focused on the path between two systems instead of what the
 source and destination systems are.
diff --git a/docs/source/development/reference/datatypes.rst b/docs/source/development/reference/datatypes.rst
index 7f2c4b41..7ed2da49 100644
--- a/docs/source/development/reference/datatypes.rst
+++ b/docs/source/development/reference/datatypes.rst
@@ -8,7 +8,7 @@ This section describes the numerous data types in use in PROJ.4. As a rule
 of thumb PROJ.4 data types are prefixed with ``PJ_``, or in one particular case,
 is simply called :c:type:`PJ`. A few notable exceptions can be traced
 back to the very early days of PROJ.4 when the ``PJ_`` prefix was not
-consistenly used.
+consistently used.
 
 Transformation objects
 --------------------------------------------------------------------------------
@@ -234,7 +234,7 @@ domain.
 
 .. c:type:: PJ_XYZT
 
-    Generic spatiotemporal coordinate. Usefull for e.g. cartesian coordinates with
+    Generic spatiotemporal coordinate. Useful for e.g. cartesian coordinates with
     an attached time-stamp.
 
     .. code-block:: C
diff --git a/docs/source/development/reference/functions.rst b/docs/source/development/reference/functions.rst
index 38ddbde3..18149139 100644
--- a/docs/source/development/reference/functions.rst
+++ b/docs/source/development/reference/functions.rst
@@ -15,7 +15,7 @@ Threading contexts
 
 .. c:function:: void proj_context_destroy(PJ_CONTEXT *ctx)
 
-    Deallacote a threading-context.
+    Deallocate a threading-context.
 
     :param PJ_CONTEXT* ctx: Threading context.
 
@@ -182,15 +182,15 @@ Coordinate transformation
     :param double* y: Array of y-coordinates
     :param double* z: Array of z-coordinates
     :param double* t: Array of t-coordinates
-    :param size_t sx: Step lenght, in bytes, between consecutive elements of the corresponding array
+    :param size_t sx: Step length, in bytes, between consecutive elements of the corresponding array
     :param size_t nx: Number of elements in the corresponding array
-    :param size_t sy: Step lenght, in bytes, between consecutive elements of the corresponding array
+    :param size_t sy: Step length, in bytes, between consecutive elements of the corresponding array
     :param size_t nv: Number of elements in the corresponding array
-    :param size_t sz: Step lenght, in bytes, between consecutive elements of the corresponding array
+    :param size_t sz: Step length, in bytes, between consecutive elements of the corresponding array
     :param size_t nz: Number of elements in the corresponding array
-    :param size_t st: Step lenght, in bytes, between consecutive elements of the corresponding array
+    :param size_t st: Step length, in bytes, between consecutive elements of the corresponding array
     :param size_t nt: Number of elements in the corresponding array
-    :returns: Number of transformations succesfully completed
+    :returns: Number of transformations successfully completed
 
 
 
@@ -201,7 +201,7 @@ Coordinate transformation
     :param PJ* P:
     :param `direction`: Transformation direction
     :type `direction`: PJ_DIRECTION
-    :param size_t n: Number of cordinates in :c:data:`coord`
+    :param size_t n: Number of coordinates in :c:data:`coord`
     :returns: :c:type:`size_t` 0 if all observations are transformed without error, otherwise returns error number