Copyright (C) 2011 by Will Kamp <manimaul!gmail.com>
Distributed under the terms of the Simplified BSD Licence.
These are wrapper programs for tilers-tools, gdal and gemf
designed to create gemf files from bsb charts

Required programs:
gdal 1.7+, pngnq, python, python imaging library (PIL)

Optionally, if you use a more recent version of tilers-tools you should make the following customizations:
(http://code.google.com/p/tilers-tools/)

###################################################################################

tiles_opt.py

-   command(['pngnq','-n',options.colors,'-e','.png','-d',dpath,src])
+   command(['pngnq','-s1','-g2.2','-n',options.colors,'-e','.png','-d',dpath,src])

###################################################################################

reader_bsb_data.csv

# KNP/ projection parameters
+proj_knp,OTHER,                          PROJ4:+proj=merc,PP:lat_ts,
+proj_knp,UNKNOWN,                        PROJ4:+proj=merc,PP:lat_ts,

###################################################################################

map2gdal.py

-        lines=[f.readline() for i in range(10)]
+        lines=[f.readline() for i in range(24)]

###################################################################################

gdaltiler.py

-            mtd_lst=[xml_txt('MDI',metadata[mdkey].encode('utf-8'),4,key=mdkey) for mdkey in metadata]
-            meta_txt=meta_templ % '\n'.join(mtd_lst)
+        try:
+            mtd_lst=[xml_txt('MDI',metadata[mdkey].encode('utf-8'),4,key=mdkey) for mdkey in metadata]
+            meta_txt=meta_templ % '\n'.join(mtd_lst)
+        except:
+            print("error encoding meta data")
+            meta_txt=''