Changes between Version 29 and Version 30 of HYCOM

Timestamp:

10/03/09 12:39:00 (4 years ago)

Author:

jjr8

Comment:

--

HYCOM

@@ -1 +1 @@
 = Extracting ArcGIS rasters from the HYCOM global ocean model's 4D netCDFs =
-
-'''THIS EXAMPLE IS UNDER CONSTRUCTION'''
 
 The [http://www.hycom.org/ Hybrid Coordinate Ocean Model], or HYCOM, is a sophisticated, high resolution system for simulating ocean physics. HYCOM is a set of equations refined over many years that describe the effects of the tides, winds, earth's rotation, and many other factors on the flow of water. Using supercomputers, the HYCOM team executes these equations at fine spatial and temporal scales to produce daily 3D snapshots of oceanographic variables such as temperature, salinity, and current velocity. At the time of this writing, HYCOM had been applied to global ocean simulations at 1/12º resolution and several ocean basins at higher resolution.
@@ -164 +162 @@
 
  * The extents of the rasters for deep layers are smaller than those for the surface layers. This is because the deeper layers have less data (i.e. the water stops at the sea floor) and the Python script does not try to create layers on a fixed extent. ''TODO: Add pictures showing this.'' You could modify the script to set the geoprocessing's extent prior to doing the extractions and it should produce them on a consistent extent.
+
+ * In the Python script, a lot of the execution time is spent handling the Arctic and Antarctic regions. The script writes the points out to a CSV file, converts it to a shapefile, and then interpolates a raster. If you are just interested in the Mercator section, you can comment out the code that creates the Arctic and Antarctic regions and the script will go a lot faster. Be sure to also comment out the portion of the code that checks for the existence of the Arctic and Antarctic rasters. If you don't comment that out, every time the script restarts, it will start from the beginning again and probably never complete a large batch of extractions.