Changes between Version 15 and Version 16 of ossimElevationSetup

Timestamp:

Sep 30, 2014, 10:25:45 AM (10 years ago)

Author:

dburken

Comment:

--

ossimElevationSetup

@@ -76 +76 @@
 
 '''1) Set up the geoid grids:'''[[BR]]
+Generic support:[[BR]]
+There is now generic geoid grid support that uses an ossim image handler to read the grid.  So you can use any image provided it can be opened by ossim and a valid geometry is picked up.  Example of using a raw raster file with the EGM2008 grid in it:[[BR]]
+
+{{{
+geoid_manager.geoid_source0.connection_string: $(OSSIM_DATA)/elevation/egm2008/Und_min1x1_egm2008_isw_equal_82_WGS84_TideFree_SE.ras
+geoid_manager.geoid_source0.enabled: true
+geoid_manager.geoid_source0.geoid.type: egm2008
+geoid_manager.geoid_source0.memory_map: false
+geoid_manager.geoid_source0.type: geoid_image
+}}}
+
+In the above example the points to note.[[BR]]
+1) There was a geometry file created for the raw raster grid.[[BR]]
+2) The grid had a constant at the beginning and end of each row that had to be ignored with omd file.[[BR]]
+3) Notice the "geoid.type" keyword is set to "egm2008".  To map this to an elevation source1 do:[[BR]]
+
+{{{
+elevation_manager.elevation_source1.geoid.type: egm2008
+}}}
+
+Specific geoid grid support:[[BR]]
 The geoid manager can handle three types of geoids.  These are documented in the ossim preferences template.  See below snip.  At a minimum you should have the geoid_egm_96_grid which is available from the ossim svn repository at:[[BR]]
 [http://trac.osgeo.org/ossim/browser/trunk/ossim_package_support/geoids/geoid1996]