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Define one or more possible base layers
Define one overlay for the track and one for way points
Define a layer of point of interests (POI)
Define the symbology of each layer by use of Symbology Encoding
according eventually a set of predefined symbologies for points, lines,
texts, areas, etc.
Define initial map extent and spatial reference system
Describe metainformation, layer name, date, author, source, orientation,
legend, etc.
The XML SE file which is the dictionary collection of the POI visual at-
tributes (icon, color, texture, number, label, etc) can be inserted as part of
WFS file that includes via GML tags all the semantic details and geo-
graphic coordinates of the different POIs.
WMS will then visualize on the collected base maps, the mash ups of the
POIs retrieved from WFS file with SE visual symbols. The author name,
source, date, orientation, scale, legend, etc are inserted as modules on the
base-map.
The drawback of this solution is that each base-map will include its own
metadata and if we want to contact many providers, the integration of
many base-maps via WMS will keep the copyrights for each map provider
such as source, legend, date, etc. for marketing purpose. Besides, the sym-
bology encoding XML file is defined manually by the admin-cartographer
as reference and we can't accept the proprietary symbols of each provider.
Otherwise, we must include a knowledge database to collect and match all
the Symbology Encoding files from the different providers towards a do-
main global one. This knowledge database is a kind of geo-ontology for
icon-based retrieval that we decided to implement it in our solution.
4.2.2 Scenario 2: Applying a new type of Ontology with visual
concepts
From (Domingues et al. 2009), we can find that it is possible to develop a
geo-ontology framework for color assignment to maps on demand. In
order to develop automatically a map based on the graphical semiology
rules, the users' preferences for colors and the outputs of the Chromatic
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