Overview of GridMapper:

v1.7.4 - 10 Jan 2023
Fixed parsing of grid with lower case.

v1.7.3 - 26 June 2022
Fixed parsing of 8-character Grid Square.

v1.7.2 - 26 April 2022
Fixed map not rendering due to not using https call to google maps api.

v1.7.1 - 12 November 2021
Fix proper parsing of VUCC_GRIDS for multi-grid entries.

v1.7 - 15 March 2019
Rewrite of internal parsing, saving another 5-10% of peak memory usage, depending on upload size.

v1.6.8 - 1 November 2018
Added http request for browser referrer headers, this is required for Google Maps API.
Some browser appear not to send this, even on same site.

v1.6.7 - 27 October 2018
Fixed small parsing error in ADIF application field.
Adjusted Google API settings to work properly.

v1.6.6 - 22 October 2018
Updated for new Google Maps API, using keys. Usage quote is set to 750 maps per day.

v1.6.5 - 7 October 2018
Google Maps API change warning.
Added some form defaults via URL line options, per user request. See online help page.

v1.6.4 - 9 September 2018
Small regression bug fix in KML creation that broke KML output since v1.6

v1.6.3 - 25 April 2018
Small (long standing) bug fix in handling of incorrectly formatted ADIF records.

v1.6.2 - 22 April 2018
Small regression bug fix for FFMA award tracking.

v1.6.1 - 10 April 2018
Per user request, added support for the 'VUCC_GRIDS' field (used in SAT propagation mode).

v1.6 - 15 March 2018
Rewrite of internal ADIF parsing, resulting in 70% reduced memory footprint on several test files.
This means larger ADIF files (more qso's) can be processed. Successfully tested on a file with 11800 QSO's!

v1.5.2 - 7 March 2018
Fix to handle ADIF files without a header record.
Added option to set initial Google Maps zoom level.

v1.5.1 - 11 February 2018
Added statistics on propagation mode requested, viewable from 'stats' option.
Fixed bug in statistics count where 'demos' were also counted toward upload stats.

v1.5 - 4 February 2018
Added ability to filter qso's by "propagation" mode, per user request to display only 'Satellite' contacts.
Added calculation of 'band' field (based on 'freq' value) if not found in qso record.
Refactoring of some internal libraries.
Minor modification to initial form page.

v1.4.2 - 26 February 2017
first attempt to minimize memory usage, to allow upload of larger ADIF files.
also add 630m in band selector, per a user request.

v1.4.1 - 25 May 2014
Small fixes for PHP >= 5.4
Update to adodb library from V5.10 to V5.19

v1.4 - 1 May 2014
Add global accumulative grid statistics

v1.3 - 8 January 2014
Added FFMA accumulated stats per year, and can be displayed per year.

v1.2.2 - 23 August 2013
Refresh of icons.
Added FFMA grid accumulative statistics.

v1.2.1 - 9 January 2013
Bugfix in FFMA; missing grids are yellow again

v1.2 - 1 December 2012
Add FFMA accumulative statistics for worked or confirmed counts

v1.1.5 - 15 September 2012
more flexible code to handle callsign search sites
more help links from initial form

v1.1.4 - 14 September 2012
Added option in worked station list to create link for callsigns to several callsign database search sites.

v1.1.3 - 5 September 2012
Minor fixes to home grid labelling in output.
Minor internal code cleanup.

v1.1.2 - 1 September 2012
text/label changes only.

v1.1.1 - 29 August 2012
Added cumulative statistics gathering for FFMA grids.

v1.1 - 28 August 2012
Addition of Fred Fish Memorial Award code.

v1.06 - August 2012
Some fixes to show total grid square count.
Show worked grid square counts, per suggestion by W4ABC
Various bugfixes in KML rendering.

v1.05 - June 2012
fix to display gridsquare count, instead of grid count (ie DM33 vs. DM)

v1.04 - 02 May 2012
Small bugfixes in handling of bad or empty ADIF files

v1.0.3 - 15 February 2012
Small bugfixes

v1.0.2 - 23 August 2011
Added the grid color options to the KML output.
Several Google Maps options not working in KML (yet).
Output filename for KML now include timestamp for allow multiple file to distinguised.

v1.0.1 - 10 July 2011
Added outlines of the major grid, eg. "DM" in both Google Maps and KML file.
Added various Google Maps display options, such as color, etc.

v1.0 - 20 June 2011:
Initial release. Can produce Google Maps, or download KML file. ADIF filtering on band and year only.
Confirmed grds in green, unconfirmed in red. Home (sub)grid square also marked.