glinks.pl
 GRASSLinks                            Version 3.2beta2
 Additions by Len Coop                 Last Modified 8/27/2006
 Changelog version 3.5beta1 - L. Coop IPPC Oregon State University

Fall 2001
 - Added LatLong support, all coords stored and used as decimal LL
 - Modify display2/3 appearance to make better use of screen real estate
 - Add Site Labels and p.map Legends capabilities as options
   (needs further work)
Winter 2002
 - Add siteform query feature to bring up HTML FORM with custom queries
   for the selected site: for databases and other external applications
 - Add vectorform query feature to bring up HTML FORM with custom queries for
   selected vector (polygons): for databases and other external applications
   (requires modification of cats or dig_cats to include html; e.g.
      53241:wa241.soil.txt
 - Add site marker options including standard sizes plus user-constructed
   icons (made with p.icons).
 - Multiple GRASS Locations support - now tracked/specified as the 5th field
   for project descriptions in the GL_list file, example:
        project|n|DD Calculator: NW States||nw_nl|nw_30s@coopl
   where nw_nl is the GRASS location. Formerly only a single Location
   was supported.
Spring-Summer 2002
 - Add GRASS standard global and spearfish databases with proper config
   to provide standard for installation and testing. (4-13-02)
 - Use PNG rather than GIF for output (needs cleanup work)
 - Add second raster layer for semi-transparent/overlay option
   example: show data overlaying spot image (first version with ppmmix,
   later expand to pnmcomp for variable opacity). (4-17-02)
Sept 2002
 - Work to improve installation. Include at least one GRASS database
   Spearfish with GRASSLinks to avoid tricky setup pitfalls
 - Check and update all files for first release as open source software
Oct-Feb 2003
 - update second raster layer routines - using pbm utility ppmmix (and pnmtopng)
   alternative pbm routine commented out (pnmcomp), doesnt perform as well
   a native GRASS solution would be better but this allows shade relief to look OK
 - Update INSTALL a bit more after a couple tests
Jan 2006
 - add a "no query show" feature to speed up display - now the program does not sit
   and churn on vectors that have no data to query because the flag prevents trying
Aug 2006
 - the long awaited features - since we failed to get a good mapserver as a replacement,
   include "hierarchical zoom" so now layers are defined according to the min and max resolution
   (minscale and maxscale) that they will be displayed.
 - also added a javascript zoombox feature needed especially to zoom in, managed to restrict it
   to zoomin only, but other modes (query in particular) should be added later
 - will call this version 3.5 and try to update docs and demos to use the new features