Fix vision documentation redirects and references. (googleapis#3202)

Author: daspecster

docs/vision-usage.rst

@@ -130,7 +130,7 @@ Face Detection
 an image and return the coordinates in the image of each `landmark type`_ that
 was detected.
 
-.. _landmark type: https://cloud.google.com/vision/reference/rest/v1/images/annotate#type_1
+.. _landmark type: https://cloud.google.com/vision/docs/reference/rest/v1/images/annotate#type_1
 
 .. code-block:: python
 

vision/google/cloud/vision/face.py

@@ -434,7 +434,7 @@ class LandmarkTypes(Enum):
     """A representation of the face detection landmark types.
 
     See:
-    https://cloud.google.com/vision/reference/rest/v1/images/annotate#Type_1
+    https://cloud.google.com/vision/docs/reference/rest/v1/images/annotate#type_1
     """
     UNKNOWN_LANDMARK = 0
     LEFT_EYE = 1

vision/google/cloud/vision/feature.py

@@ -19,7 +19,7 @@ class FeatureTypes(object):
     """Feature Types to indication which annotations to perform.
 
     See:
-    https://cloud.google.com/vision/reference/rest/v1/images/annotate#Type
+    https://cloud.google.com/vision/docs/reference/rest/v1/images/annotate#Type
     """
     CROP_HINTS = 'CROP_HINTS'
     DOCUMENT_TEXT_DETECTION = 'DOCUMENT_TEXT_DETECTION'
@@ -45,7 +45,7 @@ class Feature(object):
                         feature type.
 
     See:
-    https://cloud.google.com/vision/reference/rest/v1/images/annotate#Feature
+    https://cloud.google.com/vision/docs/reference/rest/v1/images/annotate#Feature
     """
     def __init__(self, feature_type, max_results=1):
         try:

vision/google/cloud/vision/geometry.py

@@ -137,7 +137,7 @@ class Position(object):
     """A 3D position in the image.
 
     See:
-    https://cloud.google.com/vision/reference/rest/v1/images/annotate#Position
+    https://cloud.google.com/vision/docs/reference/rest/v1/images/annotate#Position
 
     :type x_coordinate: float
     :param x_coordinate: X position coordinate.
@@ -213,7 +213,7 @@ class Vertex(object):
     """A vertex represents a 2D point in the image.
 
     See:
-    https://cloud.google.com/vision/reference/rest/v1/images/annotate#Vertex
+    https://cloud.google.com/vision/docs/reference/rest/v1/images/annotate#Vertex
 
     :type x_coordinate: float
     :param x_coordinate: X position coordinate.

vision/google/cloud/vision/likelihood.py

@@ -37,7 +37,7 @@ class Likelihood(Enum):
     """A representation of likelihood to give stable results across upgrades.
 
     See:
-    https://cloud.google.com/vision/reference/rest/v1/images/annotate#likelihood
+    https://cloud.google.com/vision/docs/reference/rest/v1/images/annotate#likelihood
     """
     UNKNOWN = 'UNKNOWN'
     VERY_UNLIKELY = 'VERY_UNLIKELY'