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Raster charts are simply made by scanning
a paper chart (or in the case of ARCS the original photo
masters) and then geo-referenced. The advantage of raster charts
is that they are an exact replica of the original paper chart,
with no change of data being left off. The downside is that they
are just an image, and cannot give the facilities a vector chart
can give.
They are relatively low cost to produce, and coverage is
consequently very good.
HCRF format:
ARCS - are official raster charts produced by
the British Admiralty which offer world-wide coverage. An ARCS
catalogue is provided within seaPro and on the seaPro demo CD.
The charts can either be purchased outright (skipper service) or
leased with an update service for a year (Navigator service)).
For current listing and availability
http://www.ukho.gov.uk/chart_availability.html
Seafarer - are official raster charts produced
by the Australian Hydrographic Office which cover Australasian
waters.
.
NZ Mariner - New Zealand Hydrographic Office
Charts.
Euronav is a distributor for the above products.
BSB - Available from a number of manufacturers
throughout the world, the prime supplier is Maptech (especially
in the USA).
Note: There are a number of BSB 'dialects', most are supported
but compliance with all cannot be guaranteed. Notably those with
copy protection mechanisms (version 4.0 and above).
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