Changeset 2048 for inundation/wiki

Timestamp:

Nov 21, 2005, 2:58:38 PM (19 years ago)

Author:

duncan

Message:

comments

File:

• inundation/wiki/least_squares_redesign.txt (modified) (4 diffs)

inundation/wiki/least_squares_redesign.txt

@@ -64 +64 @@
 memory error.
 
-Remove least_squares commandline interface until a need arises.
+Remove least_squares commandline.  This means it will be called using
+python files, which should increase accountability.
 
 Points do not have to be supplied all at once.  They can be supplied
@@ -76 +77 @@
 a float, let the user set the default value that is returned for
 points outside the mesh. if the value can be set to NAN, then set it
-to NAN, if no default is given.
+to NAN, if no default is given. 
+
 
 Reduce the time spent building matrix A. (not a testable requirement)
+
+Points do not have to be supplied all at once.  They can be supplied
+as blocks. (This will improve memory use)
 
 A target to aim for
@@ -114 +119 @@
 info.  Need a building phase and a solve phase.  
 
+*Returning information on points outside the mesh.
+Do not find that these points are outside the mesh by searching the
+binary tree.  Do it by using polygon.  (data_manager.sww2dem does not
+use the expanded search, since it needs points outside the mesh, and
+setting precrop to True means these points are not returned.  Using a
+precrop of true and expand search true grinds the system to a halt.)
 
 *To reduce the time spent building matrix A.
@@ -119 +130 @@
 Change the expansion algorithm, when determining what triangle a point
  is in, when none of the vertices are in the cell the point is in.
- It is imperative to avoid a situation where the search goes back to the root for a large number of points such as what we see in sww2dem (data_manager.py).
- 
 
 Options (still thinking about this one)