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Laboratory on Geoinformatics and Cartography
7. MAP COMPOSITIONS ON THE WEB,
OGC WEB MAP CONTEXT
Laboratory on Geoinformatics and Cartography
• Article 11
“View services making it possible, as a minimum, to
display, navigate, zoom in/out, pan, or overlay viewable
spatial data sets and to display legend information and
any relevant content of metadata”
The only indirect remark in the directive
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• More detailed information in Article 14 “Portrayal”
“1. For the portrayal of spatial data sets using a view network
service as specified in Commission Regulation No 976/2009, the
following shall be available:
(a) the layers […] for the theme or themes the data set is related
to;
(b) for each layer at least a default portrayal style, with as a
minimum an associated title and a unique identifier.
2. For each layer […] defines the following:
(a) a human readable title of the layer to be used for display in
user interface;
(b) the spatial object type(s) that constitute the content of the
layer.”
Commission regulation No 1089/2010
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• The Commission Regulation No 1089/2010 describes
the requirements for each theme
• Are you aware of the consequences?
Commission regulation No 1089/2010
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1) If you are very lucky, like the HY theme
INSPIRE data specifications visualization
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2) If you are a little bit lucky, like the TN theme
INSPIRE data specifications visualization
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3) If you are not lucky at all, like the SR theme
INSPIRE data specifications visualization
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• Anyway, even if you are lucky, you may have such
results
“Final“ visualization
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• Definition of portrayal for a specified content
– Defined on the level of layer
• The same possibilities as “traditional” cartography
– Bertin (1967)
– graphic variables
• A style may be
customized to the
user’s needs
Definition of a cartographic style
point line polygon
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<StyledLayerDescriptor version="1.0.0" xmlns="http://www.opengis.net/sld" xmlns:ogc="http://www.opengis.net/ogc"
xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.opengis.net/sld http://schemas.opengis.net/sld/1.0.0/StyledLayerDescriptor.xsd">
<NamedLayer>
<Name>Hranice_VU</Name>
<UserStyle>
<Name>Hranice_VU</Name>
<Title>Hranice vojenského újezdu</Title>
<FeatureTypeStyle><Rule>
<PolygonSymbolizer>
<Fill>
<CssParameter name="fill">#dbc0da</CssParameter>
<CssParameter name="fill-opacity">0.1</CssParameter>
</Fill>
<Stroke>
<CssParameter name="stroke">#db8ad8</CssParameter>
<CssParameter name="stroke-width">2</CssParameter>
</Stroke>
</PolygonSymbolizer>
</Rule>
</FeatureTypeStyle>
</UserStyle>
</NamedLayer>
</StyledLayerDescriptor>
</StyledLayerDescriptor>
Definition of a cartographic style (SLD)
Style name Testing style
Geometry polygon
Fill (RGB) #dbc0da
Opacity 0,1 (tj. 10%)
Outline #db8ad8
Outline width 2 pixels
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Reaching cartographic interoperability
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server 1
klient
server 2
server 3
http://URL_adresa_serveru?SER
VICE=WMS&version=1.1.1&RE
QUEST=GetMap&Layers=1&srs
=EPSG:4326&BBOX=16.34,
49.22, 16.57,
49.93&WIDTH=701&HEIGHT=38
6&FORMAT=image/png
&STYLES=style1
Reaching cartographic interoperability
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Laboratory on Geoinformatics and Cartography
server 1
klient
server 2
server 3
http://URL_adresa_serveru?SER
VICE=WMS&version=1.1.1&RE
QUEST=GetMap&Layers=1&srs
=EPSG:4326&BBOX=16.34,
49.22, 16.57,
49.93&WIDTH=701&HEIGHT=38
6&FORMAT=image/png
&STYLES=style2
Reaching cartographic interoperability
Laboratory on Geoinformatics and Cartography
server 1
klient
server 2
server 3
http://URL_adresa_serveru?SER
VICE=WMS&version=1.1.1&RE
QUEST=GetMap&Layers=1&srs
=EPSG:4326&BBOX=16.34,
49.22, 16.57,
49.93&WIDTH=701&HEIGHT=38
6&FORMAT=image/png
&STYLES=style3
Reaching cartographic interoperability
Laboratory on Geoinformatics and Cartography
• OGC Web Map Context (WMC) implementation
specification
– Latest version 1.1.0 since 2005
– Addition to the OGC WMS implementation
specification
• Composes of:
– information about the server(s) providing layer(s) in
the overall map
– the bounding box and map
– sufficient operational metadata for Client software to
reproduce the map, and ancillary metadata used to
annotate or describe the maps
Map compositions
Sounds that similar to you?
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Map compositions
server 1 server 2
server 3
server 4
klient
Laboratory on Geoinformatics and Cartography
Map compositions
server 1 server 2
server 3
server 4
klient
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Saving a map composition…the easy way
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Map composition – the XML encoding
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• Some geoportals enable to search also for the map
compositions…even if it is not explicitly required under
INSPIRE
Discovering map compositions