Changes between Initial Version and Version 1 of WeekReport

Timestamp:

May 29, 2009, 9:39:00 AM (15 years ago)

Author:

epifanio

Comment:

--

WeekReport

@@ +1 @@
+
+-- Report --
+
+i start to wrote code  .... my first time using svn (cool!) 
+
+i'll try to describe it here ...
+
+
+
+what is done :
+
+-  code to use ossim TCP capabilities to set a position and a point of view based on (lon, lat, altitude, roll, pitch, gain) (finished)
+-  code for reading the gps data from dgps and display the nmeadata in the gui (include a map view using qtwebkit), it will use a fixed position (gps) and a modificable view setting (roll,pitch,gain) (finished)
+-  code to change the position using a joystic (needs some implementation yet, but is ready for test) 
+
+so the position message can be sended using gui, gps, joystick
+
+- code to read the grass environment and retrieve a list for vector, raster and regions in the running mapset  
+ so it is possible to syncronize the posiotion in ossimplanet on the center of the active grass region or change the region to a speciphic layer or saved region
+
+- code to export grass elevation data to ossimplanet (g.ossim) the code is usable from the pyqt gui or directly from grass (finished)
+- code to read vector layer in grass and export it to kml (it is to have a custom kml settings, like color, label etc...) (needs testing, not finished)
+
+
+what to do during the next week :
+
+- finish the code i described first
+- work on a table widjet (it will contain the avayable layer in the mapset and a checkbox for each layer i'll try to realize a "query system" connected to the gui )
+- reorganize the code in a clean way, ranaming function give them a better position in the code and create comment 
+
+
+known problems that can block me :
+
+using the gdal-ossim plug-in we can read grass raster layer but there are problems to reneder images with more than 255 entries in the colortable.
+
+i had a chat with FrankW where we discuss a bit the problem, i stored the irc log here :
+
+http://trac.osgeo.org/ossim/attachment/wiki/GdalOssimPlugin/frankw_irclog.txt
+
+tring to summarize it :
+
+the code needs to be modified to handle three cases - 8bit, 16bit and 32bit integers and to error out gracefully if it isn't one of those cases...
+... and "the s[sample] value it fetched from the input buffer this would need to be altered to fetch it based on the type of the buffer." in function loadIndexTo3BandTile
+
+what i learn .. : 
+
+theSingleBandTile    --->  point to a byte array (that isn't every true)
+theGdalBuffer.resize(theSingleBandTile->getSizePerBandInBytes()*2);  ---> the band is readed correctly but is is "casted" to 8bit
+
+i think gdal-grass should read correctly the grass data, so maybe the problem is in the colortable rendering in the GDAL OSSIM driver.
+
+i'm tring to documenting myself reading :
+
+http://www.gdal.org/gdal_datamodel.html 
+
+and :
+
+ossimGdalTileSource::loadIndexTo3BandTile()
+
+... seems it accepts only raster files with 3band or with indexcolor , need i a function to port in rgb mode a grass color table ?
+
+i'm reading the grass colortable structure to learn more
+
+any suggestion, lines of code, examples ... that can help me to know how to work on the gdal-ossim code ..  can make me happy
+... i know it is not a simple task.
+