Changes between Version 16 and Version 17 of IppToPspsDatastorePV3Descriptions

Timestamp:

Nov 5, 2015, 11:26:12 PM (11 years ago)

Author:

chambers

Comment:

--

IppToPspsDatastorePV3Descriptions

@@ -22 +22 @@
 == Step 3 == 
 
-For each set of 4 layers, called dxlayer[num], subdivide those to have segments of equal amount of data. This example here only has 8 segments per dxlayer[num]. Also, note that everything is divided in integer units of ra/dec (no fractional degrees). The division should be made by dividing the data in Right Ascension along a layer into X segments of approximately equal data size, where X is 24 for the Forced Warp and Detections. These boundaries are also rounded off to the nearest integer degree of Right Ascension. 
+For each set of 4 layers, called dxlayer[num], subdivide those to have SLICES of equal amount of data. This example here only has 8 SLICES per dxlayer[num]. Also, note that everything is divided in integer units of ra/dec (no fractional degrees). The division should be made by dividing the data in Right Ascension along a layer into X SLICES of approximately equal data size, where X is 24 for the Forced Warp and Detections. These boundaries between SLICES are also rounded off to the nearest integer degree of Right Ascension. 
 
 [[Image(kens2.png, 600px)]]
@@ -29 +29 @@
 == Step 4 ==
 
-Each of these segments corresponds to a datastore. Each datastore is of the same size, and roughly maps to 1 dxlayer machine.  
+Each of these rectangular in (RA,DEC) CHUNKS corresponds to a Datastore. Each datastore is of the same size. 
 (note - i think better to for DS label to have a (x,y), because that is how we will load and merge. i.e. 
 DS01-1 is most north and starts at RA >= 0. A SLICE is a sequential set of chunks in increasing RA, with a single chunk from each DXLAYER. )