GRASS Location Wizard

Development of a graphical Wizard to easily create locations

Background

It is a long standing problem for newcomers that locations can be only created in an ASCII based interface.

Idea

Write a graphical Wizard to easily create locations which leads the user through a dialog of:

• directory of GRASS database (option to create new directory if needed)
• name of location (avoid white spaces in name)
• name of mapset (default: PERMANENT)
• query for (non)projection:
  • xy unreferenced data: rows, cols, xmin, xmax, ymin, ymax, default raster resolution
  • lat/long: ellipsoid + geodetic datum (from list or EPSG code), W, N, E, S, default raster resolution
  • UTM: ellipsoid + geodetic datum (from list or EPSG code), W, N, E, S, default raster resolution
  • Other projections: ellipsoid + geodetic datum + lase easting/northing etc (from list or EPSG code), W, N, E, S, default raster resolution

Material

(please use 6.3-CVS-HEAD)

• the current GUI startup is in 'lib/init/gis_set.tcl'
• the EPSG file is browsable through 'lib/init/epsg_option.tcl[.in]'
• the needed parameters for each projection are defined in 'lib/gis/geo_init.c' (the ASCII location dialog follows this file to query the user)
• geodetic datums are here: 'lib/gis/datum*'

Python: a new SWIG based interface to GRASS' C functionality is in 'swig/python/'

Questions

• write in TclTk (maybe horrible) or Python (nicer, but extra dependency)?

Results

• http://les-ejk.cz/tmp/grassstartup.png
• http://les-ejk.cz/tmp/wizard.png
• http://les-ejk.cz/tmp/wizard.dia
• integration