Geoscience Reference
In-Depth Information
Figure 11:
confusions
The fourth section provides additional available information. The user can
download original textual specification files corresponding to his/her
query, and is able to view a subset of the database, and download it in
KML
format in order to be able to use it on any GIS software.
The cartographic module is implemented using to the
Géoportail API
, and
the displayed layers are controlled by the system according to the term
selected by the user. In order to display only geographic objects
corresponding to the user's need, the system filters the
WMS
layers served
by
Geoserver
, using
CQL
queries which allow the creation of layers with
the
Géoportail API
. The system displays automatically the layers
corresponding to a specific database when the user switches from one tab
into another one.
In addition to functions offered by the
Géoportail API
, new ones were
implemented in our system, like retrieving a place using its address, adding
vector layers or images in order to allow the user to compare his/her data
with those proposed by our system, etc.
Thanks to our system, it is now possible to compare different databases
content with regards to a specific user's need. The implemented prototype
allows comparing the
BDTOPO®
and
BDCARTO®
contents. For example, if
the user wants to know which databases better represent channels, s/he can
quickly have detailed information about channels in each database and
visualize channels in both databases as shown on
figures 12
and
13
.
